Red Hat Bugzilla – Bug 427332
Only 800x600 resolution with ATI Radeon driver
Last modified: 2009-01-09 02:34:18 EST
Description of problem:
After installing, system-config-display allows me to select screen resolutions
of 640x480 and 800x600 only. Manually editing the xorg.conf file and setting the
required resolution to 1440x900, I get a "desktop-in-desktop" effect. That is to
say that whole desktop displays at 1440x900 but I will have another 800x600
"desktop" in the upper left hand corner of the screen. Any application that is
within that 800x600 space will be maximized to that 800x600 "desktop" space,
while applications that are outside can be maximized to full screen. Attached is
a picture of yumex and the 2 gnome panels being constrained within the 800x600
"desktop" while xchat is maximized to 1440x900.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Run system-config-display
2. Manually edit /etc/X11/xorg.conf file
3. Restart X
800x600 maximum resolution selectable. Manual editing of xorg.conf file results
in a "desktop-in-desktop" effect where a 800x600 "desktop" exists inside a
system-config-display should give me the option of selecting 1440x900. Desktop
should display at 1440x900 without the additional "virtual desktop" in it.
My display adapter according to lspci is:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY
(prog-if 00 [VGA])
Subsystem: ATI Technologies Inc Unknown device 010a
Flags: bus master, stepping, 66MHz, medium devsel, latency 32, IRQ 16
Memory at f0000000 (32-bit, prefetchable) [size=128M]
I/O ports at de00 [size=256]
Memory at feaf0000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at fea00000 [disabled] [size=128K]
Capabilities:  AGP version 2.0
Capabilities:  Power Management version 2
My xorg.conf look like this:
# Xorg configuration created by system-config-display
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
Option "XkbModel" "pc105"
Option "XkbLayout" "us+inet"
ModelName "LCD Panel 1440x900"
HorizSync 31.5 - 80.0
VertRefresh 56.0 - 75.0
Viewport 0 0
Modes "1440x900" "1400x1050" "1360x768" "1280x1024"
"1280x960" "1280x800" "1280x720" "1152x864" "1024x768" "800x600" "640x480"
Option "Composite" "Enable"
Created attachment 290705 [details]
Picture of desktop-in-desktop effect
All 8 systems with the same specs worked fine with Fedora 7.
Thanks for the bug report. We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.
Please attach X server log file (/var/log/Xorg.*.log) to the bug report as
individual uncompressed file attachment using the bugzilla file attachment link
Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 291363 [details]
Xorg.0.log Log File
Created attachment 291364 [details]
Xorg.setup.log Log File
Created attachment 291366 [details]
Xorg.0.log Log File After Removing xorg.conf
Xorg.0.log log file after removing xorg.conf and restarted PC. X starts in
Similar problem on a Sony Vaio PCG-SRX51P,
difference is, display is completely out of sync when manually selecting a
1024*768 TFT Display. Graphics card is Intel 82815 CGC. Would that fit in here
or rather make a new bug ?
the 82815 bug is different, please file a new bug.
To the original reporter, your BIOS appears to report a faulty mode for the
Please try adding Option "PanelSize" "1400x900" to your xorg.conf device section
Alright! That seems to have nailed down the problem. Thanks!
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