Intel 915G Can't get 1680x1050 to work

[Andrew Barr]

On Mon, 2007-04-02 at 20:55 -0500, david rankin wrote:
> Mates,
> 
>     This is my first post and I'm rather stumped at the moment. I have been 
> googling this issue and I can find a lot of discussion about it, but I can't 
> find a solution in the archives.
> 
>     I have a new Acer AL2216W that runs native at 1680x1050. I am using the 
> analog input. The install is Suse 10 with xorg-x11-6.8.2-100.2 and the card 
> is an Intel 915G. The video card supports 1680x1050 natively and works well 
> under M$. I cannot for the life of me get the display to work under suse 10. 
> It either is stuck in 1280x1024 or when configured for 1680x1050, the screen 
> extends well beyond to edge of the monitor in some sort of "virtual" 
> resolution that you have to scroll the mouse to be able to find the edge of 
> the screen. Also, when I provide the proper modeline created with gtf or 
> others that are very similar suggested for the Dell problem, x starts fine, 
> but the Monitor reports that it cannot create the display and I have to 
> ctrl+alt+backspace to kill the server.
>
>     I have installed and tried using both 915resolution and 855resolution to 
> patch Mode 30 or 4d to 1680x1050 at 24 bits/pixel without success.  For 
> example:
> 
> providence:/home/david/Documents/linux/video_WideScreen # 915resolution -l
> Intel 800/900 Series VBIOS Hack : version 0.5.2
> 
> Chipset: 915G
> BIOS: TYPE 1
> Mode Table Offset: $C0000 + $269
> Mode Table Entries: 27
> 
> Mode 30 : 1680x1050, 24 bits/pixel
> Mode 32 : 800x600, 8 bits/pixel
> Mode 34 : 1024x768, 8 bits/pixel
> Mode 38 : 1280x1024, 8 bits/pixel
> Mode 3a : 1600x1200, 8 bits/pixel
> Mode 3c : 1920x1440, 8 bits/pixel
> Mode 41 : 1680x1050, 16 bits/pixel
> Mode 43 : 800x600, 16 bits/pixel
> Mode 45 : 1024x768, 16 bits/pixel
> Mode 49 : 1280x1024, 16 bits/pixel
> Mode 4b : 1600x1200, 16 bits/pixel
> Mode 4d : 1920x1440, 16 bits/pixel
> Mode 50 : 1680x1050, 32 bits/pixel
> Mode 52 : 800x600, 32 bits/pixel
> Mode 54 : 1024x768, 32 bits/pixel
> Mode 58 : 1280x1024, 32 bits/pixel
> Mode 5a : 1600x1200, 32 bits/pixel
> Mode 5c : 1920x1440, 32 bits/pixel
> 
> I have edited /etc/X11/xorg.conf to include the proper modeline created with
> gft to include the following:
> 
> Section "Monitor"
>   Option       "CalcAlgorithm" "XServerPool"
>   DisplaySize  452 283
>   HorizSync    30-70
>   Identifier   "Monitor[0]"
>   ModelName    "1680X1050 at 60HZ"
>   Option       "DPMS"
>   VendorName   "--> LCD"
>   VertRefresh  59-63
>   UseModes     "Modes[0]"
> EndSection
> 
> 
> Section "Modes"
>   Identifier   "Modes[0]"
>   Modeline "1680x1050"  147.14  1680 1784 1968 2256  1050 1051 1054 
> 087  -HSync +Vsync
> EndSection
> 
> 
> Section "Screen"
>   DefaultDepth 24
>   SubSection "Display"
>     Depth      15
>     Modes      "1680x1050" "1600x1024" "1600x1000" "1400x1050" "1280x1024"
> "1440x900" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768"
>  "800x600" "768x576" "640x480"
>   EndSubSection
> 
> 
> 
> The only thing else that looks promising is to try the "NoDCC" option. Does 
> anyone have this video card/monitor combination? Does anyone else have any 
> suggestions?? Do I need to download drivers from Intel?? I know enough to be 
> dangerous when compiling from scratch to replace modules, etc., but if 
> required, I'm willing to try. Here are the current modules and what is 
> reported on the pci bus.
> 
> 
> 
> providence:/home/david/Documents/linux/video_WideScreen # lsmod
> 
> Module                  Size  Used by
> 
> i915                   23680  2
> 
> drm                    70932  3 i915
> 
> speedstep_lib           8452  0
> 
> freq_table              8832  0
> 
> <snipped>
> 
> 
> 
> providence:/home/david/Documents/linux/video_WideScreen # lspci
> 
> 00:00.0 Host bridge: Intel Corporation 915G/P/GV/GL/PL/910GL Processor to 
> I/O Controller (rev 04)
> 
> 00:01.0 PCI bridge: Intel Corporation 915G/P/GV/GL/PL/910GL PCI Express Root 
> Port (rev 04)
> 
> 00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Express 
> Chipset Family Graphics Controller (rev 04)
> 
> 00:02.1 Display controller: Intel Corporation 82915G Express Chipset Family 
> Graphics Controller (rev 04)
> 
> <snipped>
> 
> 
> It is frustrating looking at a "squished" screen or one that extends 4 in. 
> beyond the side of the monitor.
> 
> Thanks in advance and any advise, help or thoughts will be greatly 
> appreciated.

You should try the 2.0 release candidate versions of the intel driver
(available from X.org FTP). They are capable of programming modes
natively on Intel graphics hardware instead of relying on the video BIOS
to do it. I am using the latest 1.9.93 release on a G965 and an 855GM
(i830-generation) without any issues so far.

> --
> David C. Rankin, J.D., P.E.
> 510 Ochiltree Street
> Nacogdoches, Texas 75961
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