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Intel 855/915/945G Integrated Graphics and 1920×1200 resolution in xorg

The Intel driver uses the bios to determine resolutions, you need to use an app to change the bios resolution if you want 1920x1200. The default is 1920x1400, which won’t display properly. You’ll also need a 1920x1200 modeline, I’ve included it at the bottom of the post. Install the RPM and run 855resolution.
[root@host ~]# 855resolution -l
855resolution version 0.4, by Alain Poirier
 
Chipset: Unknown (id=0x27708086)
VBIOS type: 2
VBIOS Version: 1215
 
Mode 30 : 640x480, 8 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 : 1920x1400, 8 bits/pixel
Mode 41 : 640x480, 16 bits/pixel
Mode 43 : 800x600, 16 bits/pixel
Mode 45 : 1024x768, 16 bits/pixelMODE=5c
X=1920
Y=1200
Mode 49 : 1280x1024, 16 bits/pixel
Mode 4b : 1600x1200, 16 bits/pixel
Mode 4d : 1920x1400, 16 bits/pixel
Mode 50 : 640x480, 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 : 1920x1400, 32 bits/pixel
 Change the resolution:
[root@host ~]# 855resolution 5c 1920 1200
855resolution version 0.4, by Alain Poirier
 
Chipset: Unknown (id=0x27708086)
VBIOS type: 2
VBIOS Version: 1215
 
** Patch mode 5c to resolution 1920x1200 complete

I’ve also included an init.d script to change the setting at boot, just edit /etc/sysconfig/855resolution:
MODE=5c
X=1920
Y=1200

RPMS: i386 SRPM

My xorg.conf Display section
Section "Monitor"
         Identifier   "Monitor0"
         VendorName   "Monitor Vendor"
         ModelName    "LCD Panel 1920x1200"
         HorizSync    30 - 70
         VertRefresh  60
         ModeLine     "1920x1200" 162.0 1920 1984 2176 2480 1200 1201 1204 1250
+hsync +vsync
         Option      "dpms"
EndSection

This entry was posted on Tuesday, September 19th, 2006 at 07:33 and is filed under Linux. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “Intel 855/915/945G Integrated Graphics and 1920×1200 resolution in xorg”

  1. Shlomi Says:
    September 28th, 2006 at 03:07

    Hello,
    I need to get my display to run on 1920×1200.
    I followed this post (only with 915resolution instead of 855resolution, is this important?), and it seems that no matter what I do the resolution goes back to 1600×1200 or 1900×1440.

    please help me out

    Shlomi

  2. uphill Says:
    September 28th, 2006 at 06:18

    What is the output of 915resolution -l ? I’m not sure if 855 vs 915 makes a big difference, but I had better luck with 855 myself. You’ll need the modeline in your xorg.conf or else this won’t work either, xorg doesn’t have a 1920×1200 mode by default…

  3. jeff Says:
    December 28th, 2006 at 11:33

    Thanks! Helped me make my Samsung 243T get to 1920×1200 on the Dell Optiplex GX620, on Fedora Core 6.

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