Bug 505860

Summary: Wrong screen resolution on Intel Mobile GM965/GMA X3100 / phantom dual-head problem
Product: [Fedora] Fedora Reporter: Juergen Wieczorek <juergenw_>
Component: xorg-x11-drv-intelAssignee: Adam Jackson <ajax>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 11CC: ajax, xgl-maint
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-06-26 15:18:32 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
xrandr output
none
Xorg log
none
lspci output
none
new xrandr output none

Description Juergen Wieczorek 2009-06-14 11:34:28 UTC 
Description of problem:

My System:
Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz with
Intel Mobile Express GM965/GMA X3100 (256MB)
Tungsten Graphics, Inc., Mesa DRI Intel(R) 965GM GEM 20090114
2.1 Mesa 7.5-devel
Linux 2.6.29.4-167.fc11.x86_64 x86_64

My 17" LCD display (native res. 1280x1024) is connected to the DVI-I port of my computer, but wrongly detected a boot time.
The boot screed (blue progress bar(bubble?)) has a resolution of 800x600 located in the upper lefthand corner of the screen and so is the console screen.
The graphical login(kdm) has a resolution of 1024x768 and the session starts with this wrong resolution.
If I go to system-setting/display I can see that 2 displays are connected:
LVDS1 @ 1024x768 and DVI1 @ 1024x768
If I change the settings for DVI1 to 1280x1024 (and/or deactivate LVDS1) the screen resets to the correct resolution, but after a session log off or a system reset the changes are gone and I have to do the same tedious routine again.
Sometimes when changing the resolution the screen stays all black and only recovers when I switch to a console and back again.
The console resolution stays all the time at 800x600.
Adding the "nomodset" paramater to the kernel boot does not change anything.

I have encloed the X.org.log + xrandr output for further reference.
Comment 1 Juergen Wieczorek 2009-06-14 11:35:26 UTC 
Created attachment 347812 [details]
xrandr output
Comment 2 Juergen Wieczorek 2009-06-14 11:36:21 UTC 
Created attachment 347813 [details]
Xorg log
Comment 3 Adam Jackson 2009-06-19 16:44:42 UTC 
Can I get 'lspci -vn' too?  We probably need to quirk this machine as not having LVDS.
Comment 4 Juergen Wieczorek 2009-06-19 17:37:17 UTC 
Created attachment 348686 [details]
lspci output
Comment 5 Juergen Wieczorek 2009-06-19 17:50:54 UTC 
I managed to work around this problem by adding 'nomodeset' to the kernel line and creating/editing the xorg.conf as below:

Section "Device"
	Identifier  "Videocard0"
	Driver      "intel"
	Option	    "monitor-LVDS" "LVDS"
EndSection

Section "Monitor" 
	Identifier  "LVDS"
	Option "Ignore" "True" 
EndSection 

Now I have a 1280x1024 at the loging and KDE session, as it should. (see encl. new xrandr.log)
glxgears performance also has been enhanced a lot, from previous ~650 fps to now ~1170 fps (same as with Debian Lenny on this machine)

I do not get a bootsplash screen though, only a progress at the screen bottom. So 'rhgb' somehow doesn't seem to work with 'nomodeset'
Comment 6 Juergen Wieczorek 2009-06-19 17:51:39 UTC 
Created attachment 348692 [details]
new xrandr output
Comment 7 Juergen Wieczorek 2009-06-19 23:44:57 UTC 
Adding 'vga=792' to the kernel line too, gives me back the bootsplash screen and a fullscreen terminal console.
Comment 8 Juergen Wieczorek 2009-06-26 15:18:32 UTC 
Problem resolved the new kernel-2.6.29-5.191.fc11.