1440x900 resolution on 945GM (GMA 950)

1440x900 resolution on 945GM (GMA 950)

I'm trying to get my external LCD widescreen monitor to use 1440x900 with my laptop. Here's my specs:

Windows XP
Toshiba Satellite A105
Intel GMA 950 with 945GM/GU
AOC 19MVWk 19'' LCD

I'm not positive that my LCD reports any EDID information and I'm trying to modify my igxp32.inf file like others have done but I can't figure out the DTD hex codes nor find any modeline information. Any help with this would be much appreciated! I noticed archibael seems to be the expert around here and I'm hoping to catch his attention ;)

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Get MonInfo. Make sure the AOC monitor is active (any resolution will do), and then run MonInfo. It should return your EDID. If it doesn't for some bizarre-ass reason, since neither you nor I have been able to find a Linux Modeline we'll probably have to go generic. Which I do not relish, but we'll manage.

Let me know your results.

Hi archibael,

Thank you so much for your reply. I tried MonInfo and was unable to get the EDID. Both monitors are active. All I could get was the EDID from the monitor built in to the laptop. My LCD returned nothing but the following:

Monitor
Hardware information........ n/a
Windows description......... Default Monitor

Display adapter
Adapter description......... Mobile Intel 945GM/GU Express Chipset Family
Adapter device ID........... 0x27A68086
Display settings............ 800x600, 32bpp

Okay. A couple of possible issues I want to warn you about before you start: your laptop may be specifically excluding 1440x900 as an allowable resolution. This is in the BIOS, but since I don't know specifically which model Satellite A105 you have (the sub-model number determines which BIOS to use), I can't be sure.

We can get around this, but only by cheating (use 1432x892 and you may have some blank pixels on the edges, but the 1440x900 restriction will be gone).

That said, here are some DTDs I've come up with based on some stuff I've found on the web for AOC in general, if not your monitor in particular:

HKR,, DTD_1,%REG_BINARY%, 56,2A,A0,D8,51,84,2E,30,20,98,29,14,00,00,00,00,00,1E,37,01;1440x900@60...from web
HKR,, DTD_2,%REG_BINARY%, 30,2A,A0,D0,51,84,22,30,50,98,36,00,00,00,00,00,00,1E,37,01;1440x900@60...from elsewhere on web
HKR,, DTD_3,%REG_BINARY%, 97,29,A0,D0,51,84,20,30,50,98,13,00,00,00,00,00,00,1C,37,01;1440x900@60....fromweb
HKR,, DTD_4, %REG_BINARY%, 83,2A,A0,D8,51,84,2E,30,20,98,29,14,00,00,00,00,00,1A,37,01;1440x900@60 Generic

HKR,, DTD_5, %REG_BINARY%, 83,2A,98,E0,51,84,2E,30,28,98,29,14,00,00,00,00,00,1A,37,01;1432x900@60 Generic plus Hack to deal with BIOS

The first four might work, or might not, depending on the unknown timings of your monitor. Even if your monitor may like them, Toshiba's BIOS may still forbid them. The final DTD (5) is 1432x900, which should get around any Stupid BIOS Tricks Toshiba is playing on you, but your monitor may still not like the timings. I'd mess with the first hex digit (83), tweaking it up and down a bit to see if your monitor will accept variations on it.

I'll be out of town for about a week, and not near the Net much, but I'll check in when I can.

Good luck!

archibael,

Thanks so much for taking the time and putting these settings together. I'll try them as soon as I get back into the office tomorrow. One weird thing I forgot to mention is that for that LCD there were no widescreen resolutions available in the display properties. Can't wait to try out these DTD settings in the morning! Thanks again and I'll keep you posted.

archibael,

I was able to get one of the 1440x900 resolutions displaying. The one with the 61 hertz was the only one I could get working. Thank you so much for your help! Everything looks great now

Hopefully Intel can release new drivers so people with widescreen monitors won't have to go through this hassle

Glad it worked for you!

Supposedly they corrected something in the 15.4.2 drivers ( http://downloadcenter.intel.com/Detail_Desc.aspx?agr=N&ProductID=2806&DwnldID=13479&strOSs=164&OSFullName=Windows%20Vista*%2032&lang=eng)where they were improperly reading 1440x900, or improperly excluding it, or something according to the release notes.

Thanks archibael. I may try those but I think they're only for Vista and I'm running XP.

archibael,

I've been trying to get my computer to output widescreen as well and have had no luck. My lcd tv is 1366x768. I also tried the new driver from intel and it only gives me a resolution thats too big for my tv. Any help would be appreciated.

Thanks

nelson27,

Please provide:

-- Brand and model of computer, if you didn't build it yourself

-- Brand and model of TV

-- Interface you're trying to use (VGA, DVI, HDMI)

-- MonInfo data from the TV

Toshiba Satellite A105-S4184

Olevia 232V

VGA

And i'm not sure what you mean by moninfo, but the native resolution is 1366x768

I ran Moninfo and it gave me this

Monitor
Windows description......... Seiko-Epson Monitor
Manufacturer................ Seiko-Epson

Plug and Play ID............ SEC3633
Serial number............... n/a
EDID data source............ I2C bus (real-time)

Manufacture date............ 2005
EDID revision............... 1.3
Display type and signal..... Digital
Sync input support.......... n/a
Screen size................. 330 x 210 mm (~16")
Power management............ n/a

Sure you got all of it? There should be some raw EDID data underneath the MonInfo data you provided.

it also gave me this

Monitor
Hardware information........ n/a
Windows description......... Generic Non-PnP Monitor

Display adapter
Adapter description......... Mobile Intel 945 Express Chipset Family
Adapter device ID........... 0x27A28086
Display settings............ 800x600, 32bpp

Hmmm... still doesn't help, and I'm not finding Modelines or a User Manual for your monitor. I'll look around to try and find something, but the EDID would be very helpful...

for some reason, there is nothing else underneath the last info I gave you..I'll try it again and see if i get anything

this is what it gives me when I dont plug in the tv

Raw EDID base
00: 00 FF FF FF FF FF FF 00 4C A3 33 36 00 00 00 00
10: 00 0F 01 03 80 21 15 78 0A 87 F5 94 57 4F 8C 27
20: 27 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
30: 01 01 01 01 01 01 EE 1A 00 80 50 20 10 30 10 30
40: 13 00 4B CF 10 00 00 19 00 00 00 0F 00 00 00 00
50: 00 00 00 00 00 23 87 02 64 02 00 00 00 FE 00 53
60: 41 4D 53 55 4E 47 0A 20 20 20 20 20 00 00 00 FE
70: 00 4C 54 4E 31 35 34 58 33 2D 4C 30 36 0A 00 70

Yeah, that's the right format, but the info's bogus: I'm reading a 1280x800 resolution there, and since it's when you don't even have the TV plugged into the computerI'm thinking it must be from some other source entirely.

I'll do a little more digging, but your monitor seems pretty obscure in Googlespace.

yea i bet that EDID is coming from my laptop screen

I appreciate all your help, but if you can't figure it out, don't worry about it, its no big deal

Well, unfortunately, I couldn't find an exact match to your monitor. I did find several Olevia monitor Modelines which might work, but even within a single brand every monitor tends to be different...

1368x768" 87.403 1368 1456 1592 1800 768 771 781 798 -hsync +vsync

1360x768" 85.875 1360 1408 1520 1768 768 769 772 810 +hsync +vsync

1366x768" 73.800 1366 1414 1446 1526 768 773 783 793 +hsync +vsync

These translate into DTDs:

24 22 58 B0 51 00 1E 30 58 88 3A 00 00 00 00 00 00 1C; 1368x768

8B 21 50 98 51 00 2A 30 30 70 13 00 00 00 00 00 00 1E ; 1360x768

8C 21 50 98 51 00 2A 30 30 70 13 00 00 00 00 00 00 1E ; above, but rounding error on pixel clock?

D4 1C 56 A0 50 00 19 30 30 20 5A 00 00 00 00 00 00 1E ; 1366x768

Follow the instructions on the Wiki http://isnwiki.jot.com/WikiHome/Articles/111111431using these DTDs and see if any of them work. Also see if any of them don't show up in your list of modes: it's possible that Toshiba is locking one or more of them out of your BIOS, in which case we can tweak them to avoid the lockout. They still might not work with your monitor, but we can at least try them...

Sorry I couldn't be of more help.

i appreciate your help, i will try these sometime this afternoon and see if i can get one of them to work

thanks!

i tried those dtd's and they didn't work out

i tried moninfo again and it gave me this with the monitor plugged in and it still won't give me any EDID

thanks for all your help but it doesn't seem like this will work, thanks though!

I have a Panasonic Toughbook (CF-Y5) laptop. I am trying to link it to an Acer 19 widescreen monitor but I cannot provide it with the required resolution (1440-900).

I follow other posting on this issue (the great and wise archibael) but simply cannot find the "igxp32.inf" on my laptop (I cancelled all XP restrictions on viewing system or hidden files).

My OS is XP SP 2 with Intel GMA 950 with 945GM/GU.

The .inf file is found when youextract the latest drivers to your hard drive. It's in the Graphics sub-directory.

(Be careful with the 14.29 driver download-- the .zip file seems to be missing some files or have corruption or something. Best bet is to download (not "Open") the .EXE version of the drivers and then right click the .EXE file and choose "extract"-- it should act like a .zip file and extract the required files to a directory.)

Let me know if you need further help. The model number of your monitor or better yet the EDID information from MonInfo will greatly assist.

Rgds,

AB

Hi all, I have a Toshiba U-205 S5034 laptop and I'm trying to get it to extend the desktop onto a Viewsonic VX2235wm with its native resolution (1680x1050 at 60Hz). The problem i'm having with using the suggested procedure is that the laptop won't allow me to install the drivers I get from Intel. When i try and find the .inf file in the Toshiba provided driver package, it's not there. Can anybody please help?

Thank you,
mp

Which version of the drivers are you trying to install from Intel when your laptop "won't let" you? If it's the .Zip version of 14.29, see above. You need to get the .exe version of 14.29 and extract them with WinZip in order to modify the .inf.

As for the Toshiba drivers, I downloaded the latest Vista Display drivers from the Toshiba website for your model, and (similar to the 14.29 Intel drivers above) I extracted the files out of the .exe with WinZip. The .inf file was in the Graphics subdirectory where I extracted them.

Ran into this problem with a GNR 1440x900 TFT on an
i945 desktop machine (Foxconn motherboard), so I guess it's not just
laptops. Moninfo reported nothing and hacking the DTDs in the registry
didn't reveal any extra modes. I tried editing the inf file and ran
into the corrupt zip issue.

It's a customer's machine so I don't have easy access to it - might have to install a PCI-E video card if this isn't fixed soon.

--
John Jordan

ok so i keep trying this and editing the .inf file, but when i restart none of the resolutions actually show up that i editing in that file. All of the resolutions that were in the file to begin with still show up like i didn't even make any changes at all.

I read the website you sent me and did all those things, but it still seems like i can't get the resolutions to even show up in the menu. Am I doing something wrong?

Nelson,

Are the changes you've made making it into the registry?

If you go to a command prompt and type "regedit", then choose Find and look for "DTD", you should find that the DTD entries are all populated with what you put in the .INF file.

Hallo...
I do have a same problem, my fujitsu siemens could not set the correct display...
Mine is amila pro v3205, chipset intel GMA 950
by default from factory it's with XP profesional.. and now i m using vista home basic 32 bit, but some how the graphic card doesnt fit it...
i need assistance....

for private help, u can contact me by email dimasz_prio@yahoo.de

thanks in advance

Would be happy to help you, prioadhi. Let me know what monitor you're trying to drive,what resolution you want, and if you can get an EDID from MonInfo when connected to it, that would be divine.

I have a Fujitsu-Siemens Amilo Si 1520 with the GMA 950 chipset. The problems described here seem very familiar. How many of you who have problems with getting the EDID have this kind of setup:

display (D-SUB) --> cable --> adapter --> computer (DVI)

I am not able to read the EDID information from a perfectly normal and modern LG F900P CRT-monitor. The same thing happened with a Samsung LE32S73BD 32" LCD-TV. Therefore I had to drag them to another room and read the edid with another computer and then do the DTD trickery with the drivers.

EDIT: it seems that there are a few people with straight d-sub connectors and still no EDID coming through. Is there anyone with GMA950 and pure DVI setup having resolution problems?

I wonder if there is a double design flaw resulting in this catastrophe...

a) Someone has made a mistake and EDID is not coming through from devices from analog D-SUB outputs. If there is no EDID, it means that custom resolutions are needed...

b) ... and there are none. The drivers for GMA 950 do not support custom resolutions. I can not set 1280x1024 or 1600x1200 or any other than the predefined resolutions which have been decided by someone responsible for the VBIOS. Now the parameters need to hacked in by hand...

The drivers for GMA950 do support custom resolutions, but the laptop provider can specifically restrict some resolutions in the BIOS. You can get around this by moving to a slightly different rez: 1020x768 instead of 1024x768, for example.

I have never been able to set a resolution which was not available in the display properties without changing the driver configuration .inf file by hand. I do not regard this as a "feature for custom resolutions" but a hack. The laptop provider would have then restricted almost all resolutions, which seems strange (although possible).

For example:
I plugged in a LG F900P monitor to my Fujitsu-Siemens Si 1520 featuring 945GM chipset and graphics. It is a 19" CRT-monitor with D-SUB input. I wanted to use 1280x1024 resolution. The display properties did not let me choose that resolution even though it is a very common one. It only let me choose from the following: 800x600, 1024x768, 1280x720, 1280x768, 1280x600, and 1280x800. Also it offered only one refresh rate which was 60hz. I went through all possible options from the screen settings ("show unsupported resolution" etc.). Moninfo from Entech returned NULL EDID information from the monitor on my laptop with 945GM (GMA 950).

I then read the EDID with another computer (it had an old nVidia card) and inserted the bytes to igdlh.inf (I am using Windows Vista). Then I installed the drivers and now I could choose other resolutions. I am quite sure that non-technical users have trouble doing this hack, if they are even able to.

Please let me know if there is some other way to achieve the above.

I have never been able to set a resolution which was not available in the display properties without changing the driver configuration .inf file by hand. I do not regard this as a "feature for custom resolutions" but a hack.

Fair enough. I've not had this problem: when I unclick "Hide Modes This Monitor Cannot Display", I get every damned thing, and the ability to do single pixel changes (most graphics cards must be in multiples of 8) is a bonus for me. But I can see why you might consider it a hack if it's not that easy for you.

archibael:

Fair enough. I've not had this problem: when I unclick "Hide Modes This Monitor Cannot Display", I get every damned thing, and the ability to do single pixel changes (most graphics cards must be in multiples of 8) is a bonus for me. But I can see why you might consider it a hack if it's not that easy for you.

I can not resist the desire to note that as a developer and an experienced software engineer it is very easy for me. That said, I do not get any satisfaction wasting my time configuring some trivial piece of hardware. I also feel for those who are not able to modify their driver files. Therefore I think that everyone would win, if the drivers and the hardware would work more smoothly (I have never had this kind of trouble with other major graphics hardware vendors).

Wow. I have. Prior to Catalyst, ATI drivers were the buggiest in the business. They've made significant improvements, but even with vendors like Nvidia every time they release a driver which fixes one issue they break something else.

That said, it's no secret Intel's behind in this game. Their focus on graphics has been the corporate market and it's only comparatively recently that they have made a real push toget into consumer space, and it's obvious they're still struggling with the robustness, functionality, and overall user-friendliness of their driver software. The fact that the VideoBIOS still dictates which graphics modes are available is the perfect example of this.

Hi,

I have a sony vaio with a gma 950 vid card running on Vista Home Premium, I'm plugging it into a 24inch westinghouse lcd and the highest resolution i could get is 1920x1050, my lcd's native resolution is 1920x1200.. is there any work around on how I can increase the resolution?

I have another laptop with the same vid card but is on Windows XP, its max resolution is 1920 x 1200..

Thanks!

aong0827,

Download MonInfo from http://www.entechtaiwan.com/util/moninfo.shtmand report back the results from your monitor. We can probably get it working from there.

Thanks for the really quick reply. Here's what I'm getting on moninfo:

Monitor
Windows description......... Generic PnP Monitor
Manufacturer description.... L2410NM
Manufacturer................ Westinghouse

Plug and Play ID............ WDE5180
Serial number............... n/a
EDID data source............ I2C bus (real-time)

Manufacture date............ 2007, ISO week 6
EDID revision............... 1.3
Display type and signal..... Analog 0.700,0.000 (0.7V p-p)
Sync input support.......... Separate
Screen size................. 520 x 320 mm (~25")
Power management............ Active off/sleep

Color characteristics
Display gamma............... 2.20
Red chromaticity............ Rx 0.644 - Ry 0.348
Green chromaticity.......... Gx 0.286 - Gy 0.603
Blue chromaticity........... Bx 0.143 - By 0.070
White point (default)....... Wx 0.313 - Wy 0.329

Timing characteristics
VESA GTF support............ Not supported
Horizontal scan range....... 30-80kHz
Vertical scan range......... 56-75Hz
Video bandwidth............. 160MHz
Extension blocks............ n/a
Timing recommendation #1.... 1920x1200 at 60Hz
Modeline................ "1920x1200" 154.000 1920 1968 2000 2080 1200 1203 1209 1235 +hsync -vsync
Timing recommendation #2.... 1920x1080 at 60Hz
Modeline................ "1920x1080" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync

Standard timings supported
640 x 480 at 60Hz - IBM VGA
640 x 480 at 67Hz - Mac II
640 x 480 at 72Hz - VESA
640 x 480 at 75Hz - VESA
720 x 400 at 70Hz - IBM VGA
800 x 600 at 56Hz - VESA
800 x 600 at 60Hz - VESA
800 x 600 at 72Hz - VESA
800 x 600 at 75Hz - VESA
1024 x 768 at 60Hz - VESA
1024 x 768 at 70Hz - VESA
1024 x 768 at 75Hz - VESA
1280 x 720 at 60Hz - VESA
1280 x 1024 at 75Hz - VESA
1280 x 1280 at 60Hz - VESA
1440 x 1440 at 60Hz - VESA
1440 x 1440 at 75Hz - VESA
1680 x 1680 at 60Hz - VESA
1920 x 1080 at 60Hz - Westinghouse
1920 x 1200 at 60Hz - Westinghouse

Raw EDID base
00: 00 FF FF FF FF FF FF 00 5C 85 80 51 00 00 00 00
10: 06 11 01 03 68 34 20 78 2E C5 85 A4 59 49 9A 24
20: 12 50 54 BF CF 00 81 00 81 C0 B3 00 95 00 95 0F
30: 01 01 01 01 01 01 28 3C 80 A0 70 B0 23 40 30 20
40: 36 00 06 44 21 00 00 1A 00 00 00 FD 00 38 4B 1E
50: 50 10 00 0A 20 20 20 20 20 20 02 3A 80 18 71 38
60: 2D 40 58 2C 45 00 06 23 21 00 00 1E 00 00 00 FC
70: 00 4C 32 34 31 30 4E 4D 0A 20 20 20 20 20 00 48

Display adapter
Adapter description......... Mobile Intel 945GM Express Chipset Family
Adapter device
ID........... 0x27A28086
Display settings............ 1920x1080, 32bpp

Text at 1920x1080 looks so slim..

Thanks again!

Okay, your DTD for 1920x1200 is

28 3C 80 A0 70 B0 23 40 30 2036 00 06 44 21 00 00 1A

Comma delimit it, add ",37,01" to the end, and follow the instructions here on how to get new resolutions on Intel graphics chipsets.

Hi,

I have successfully added the dtd settings and verified it in regedit. But I'm not seeing this new setting..the list all modes for the adapter is still only showing upto 1920 x 1080..am I doing something wrong?

Thanks!

That should work. Could be that your Sony is explicitly refusing 1920x1200 in the VBIOS. Try 1912x1200:

28 3C78 A8 70 B0 23 40 30 2036 00 06 44 21 00 00 1A

Samedrill: make sure it gets into theregistry after running setup.

Sony probably is refusing 1920x1200, 1912x1200 worked and it is way much better than 1920 x 1080. I'm missing 8 pixels in the monitor vertically, so this means I'm like running in native res right?

And I didn't reinstall the driver anymore, just went to regedit and editted the DTD_1 entry..

Thank you very much for the kind help!!

Glad to hear it worked. You're essentially running at native rez, assuming you can tolerate the dumb 8-pixel loss. This pretty much proves Sony is explicitly rejecting 1920x1200 in the VideoBIOS. Take it up with them if you want it permanently fixed-- it's happening on their end.

If the 8 pixels is really causing you heartburn, you can probably drop it down to 2

28 3C7E A2 70 B0 23 40 30 2036 00 06 44 21 00 00 1A ; 1918x1200

or even 1

28 3C7F A1 70 B0 23 40 30 2036 00 06 44 21 00 00 1A ; 1919x1200

but you might get instability with something that's not a factor of 8.

Hi everybody there, i'm having a laptop with intel 945GM.
Also i own a monitor Acer 22" (model AL2016w) widescreen which it supports resolution up to 1680x1020.
As you understand my problem is that i can't enjoy that resolution . The max resolution i can afford is 1024x768 . I need help on how to display 1680x1020.

I run Moninfo and the information i took was:

SPECIFICATION FOR MY LAPTOP DISPLAY
Monitor
Windows description......... ????? PnP ?e????? ???s??
Manufacturer description.... Color LCD
Manufacturer................ Apple

Plug and Play ID............ APP9C5C
Serial number............... n/a
EDID data source............ I2C bus (real-time)

Manufacture date............ 2006, ISO week 13
EDID revision............... 1.3
Display type and signal..... Digital
Sync input support.......... n/a
Screen size................. 290 x 180 mm (~14")
Power management............ n/a

Color characteristics
Display gamma............... 2,20
Red chromaticity............ Rx 0,595 - Ry 0,345
Green chromaticity.......... Gx 0,320 - Gy 0,555
Blue chromaticity........... Bx 0,155 - By 0,145
White point (default)....... Wx 0,313 - Wy 0,329

Timing characteristics
VESA GTF support............ Not supported
Horizontal scan range....... n/a
Vertical scan range......... n/a
Video bandwidth............. n/a
Extension blocks............ n/a
Timing recommendation #1.... 1280x800 at 60Hz
Modeline................ "1280x800" 71,000 1280 1328 1360 1440 800 803 809 823 -hsync -vsync

Standard timings supported
n/a

Raw EDID base
00: 00 FF FF FF FF FF FF 00 06 10 5C 9C 00 00 00 00
10: 0D 10 01 03 80 1D 12 78 0A 50 C5 98 58 52 8E 27
20: 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
30: 01 01 01 01 01 01 BC 1B 00 A0 50 20 17 30 30 20
40: 36 00 1E B3 10 00 00 18 00 00 00 01 00 06 10 20
50: 00 00 00 00 00 00 00 00 0A 20 00 00 00 FE 00 42
60: 31 33 33 45 57 30 31 20 56 30 0A 20 00 00 00 FC
70: 00 43 6F 6C 6F 72 20 4C 43 44 0A 20 20 20 00 B7

Display adapter
Adapter description......... Mobile Intel 945GM/GU Express Chipset Family
Adapter device ID........... 0x27A28086
Display settings............ 1280x800, 32bpp

User/computer information
Registered user name........ makis
Registered organization..... n/a
Network user name........... makis
Network computer name....... MAKIS-PC
Windows version ............ Windows 2000
Windows build .............. 6.00.6000
Installation date .......... 3/5/2007 12:00:00

SPECIFICATIONS FOR MY ASUS LCD MONITOR:
Monitor
Hardware information........ n/a
Windows description......... ????? ?-PnP ?e????? ???s??

Display adapter
Adapter description......... Mobile Intel 945GM/GU Express Chipset Family
Adapter device ID........... 0x27A28086
&
nbsp; Display settings............ 1024x768, 32bpp

User/computer information
Registered user name........ makis
Registered organization..... n/a
Network user name........... makis
Network computer name....... MAKIS-PC
Windows version ............ Windows 2000
Windows build .............. 6.00.6000
Installation date .......... 3/5/2007 12:00:00

Please help me,
Thank you very much

Makis,

Lucky for you, your monitor is well-known in the Linux community, and a Modeline was trivial to find.

Modeline "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -HSync +Vsync

Which makes the right DTD for you

21 39 9030 621A27 40 68 B0 36 00 00 00 00 00 00 1C

Put it in the .INF file or directly into the registry and it ought to work for you.

Dear archibael,
First of all, thank you for your reply and your time. Unfortunately it didn't work and i'm unhappy .
What i did:
I found the igdlh.inf file in the drivers archive package and i changed the information you gave me. This is how it looks like the igdlh.inf file after the changesi made
(i own Windows Vista)
The red colour shows the changes

....................

HKR,, TotalDTDCount, %REG_DWORD%, 3 ; This shows number of DTDs to be used. ; 0-->Disable the feature.
;Following keys have 20 bytes (18 byte DTD + 2 Byte flags).
HKR,, DTD_1,%REG_BINARY%, 21,39,90,30,62,1A,27,40,68,B0,36,00,00,00,00,00,00,1C,37,01;1920x1080@60...Interlaced
HKR,, DTD_2, %REG_BINARY%, 01,1D,80,D0,72,1C,16,20,10,2C,1A,80,00,00,00,00,00,86,37, 01;1920x1080@50...Interlaced
HKR,, DTD_3,%REG_BINARY%, 01,1D,00,BC,52,D0,1E,20,B8,28,25,40,00,00,00,00,00,04,37, 01;1280x720@50....Non-interlaced
HKR,, DTD_4, %REG_BINARY%, 01,1D,00,72,51,D0,1E,20,6E,28,25,00,00,00,00,00,00,06,37,01;1280x720@60....Non-interlaced
HKR,, DTD_5,%REG_BINARY%, 00, 00, 00 ,00, 00, 00,00, 00, 00,00, 00, 00,00, 00, 00,00, 00, 00,00, 00;Fifth DTD

............................

I also tried to change the registry but i couldn't find the same
Thank you for your patience
My monitor model is Acer AL2016W 22''
Graphic card intel 945GM

Imade a mistake with the exact specifications of my monitor. Actually it's size is 20'' (not 22'' ). But the model number i wrote is true (Acer AL2016w) and the resolution it can display is 1680x1050. Is that information helpful..
Thank you very much

Open a command window and type regedit to bring up the Registry Editor.

Do a Find on "DTD". Those entries should show up after the install using setup.exe and be correctly populated. If they are not present, then you may need to do them manually. They are in several spots in the registry, so keep doing Find Again until you are sure you've done them all. Reboot and

If you still don't get the resolution to show up after ensuring it's right in the registry, it could be that your laptop has that resolution blocked in the VideoBIOS. Try 1672x1050 instead:

21,39,88,38,62,1A,27,40,68,B0,36,00,00,00,00,00,00,1C,37,01;1672x1050@60...Interlaced

Archibael,

I've tried what you told me to do in the registry with a registry editor but nothing worked.
I also tried the DTD information
you gave me for the resolution 1672x1050 but still nothing..
The problem is that when i try to change the resolution from the windows control panel menu or from
the intel'sconfiguration utility; i can only select for my acer monitor the resolutions 800x600 and 1024x768 .
As i told you i changed the registry with registry editor , i rebooted my machine and the changes i've done were ok
after the restart.. So what is going wrong?
I can't find out whatthe problem is. What do you think???

Many thanks

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