Red Hat Bugzilla – Bug 156686
Resolution 1280x800 not supported
Last modified: 2014-06-18 05:07:44 EDT
Description of problem:
In the Resulotion Option Menu on Tab "Settings", 1280x800 is missing
(but the Monitor Option Menu on Tab "Hardware" supports it)
This is on a Laptop with Intel 855GM on chip graphics
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Should be fixed in Rawhide. The packages you need to upgrade to check are "rhpl"
Please reopen if this is still a problem.
I updated the packages with "yum update rhpl xorg-x11".
Configuration now lets me select Resolution 1280x800, but after save and
restart, the resolution ist still at 1024x768
i810 Driver Problem?
Can you attach (not inline) the generated xorg.conf file please.
(Also please make sure that you actually restarted the X server with
Ctrl-Alt-Del - logging out/logging in is not always enough).
Created attachment 113976 [details]
Even after reboot, X comes up with 1024x768
see attached xorg.conf
What exact release of X do get? Ie., what does "rpm -q xorg-x11" give you?
I got it by doing "yum update" some hours ago.
The latest version in rawhide is -29. The latest rhpl version is -161. These two
together should fix this problem. You can get them at
for example. I don't know if there is a yum command that will do it automatically.
Created attachment 114006 [details]
xorg logfile from xorg-6.8.2-29
please note the two lines "Not using Mode ..."
the resolutions are definitvely supported, because Redmond XP can use them :-(
i810 Driver Problem?
(II) I810(0): Monitor0: Using hsync range of 31.50-90.00 kHz
(II) I810(0): Monitor0: Using vrefresh value of 60.00 Hz
(II) I810(0): Not using mode "1280x800" (no mode of this name)
(II) I810(0): Not using mode "1152x864" (no mode of this name)
(--) I810(0): Virtual size is 1024x768 (pitch 1024)
(**) I810(0): *Built-in mode "1024x768"
(**) I810(0): *Built-in mode "800x600"
(**) I810(0): *Built-in mode "640x480"
(==) I810(0): DPI set to (75, 75)
(II) Loading sub module "fb"
What does the generated xorg.conf file look like with the upgraded rhpl and the
Created attachment 114013 [details]
new generated xorg.conf
Could you check if the problem is fixed if you change the modeline from
ModeLine "1280x800_60.00" 83.5 1280 1344 1480 1680 800 801 804 828 -hsync +vsync
ModeLine "1280x800" 83.5 1280 1344 1480 1680 800 801 804 828 -hsync +vsync
Ie. delete "_60.00" from the name.
no difference (after reboot)
it works now:
- the real resolution is 1280x768 not 800 (my fault)
- I must use the tool "855resolution" by Alain Poirier to patch the buggy bios
to allow this resolution (http://perso.wanadoo.fr/apoirier/)
In that case, I'll close this bug as RAWHIDE.