Red Hat Bugzilla – Bug 54139
cannot display high resolutions on laptop with monitor
Last modified: 2008-01-25 14:54:53 EST
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Description of problem:
I'm using a Toshiba Tecra 8100 laptop with a Savage 3D video card. Through
the LCD screen, everything works fine (up to 1024*768). If set the adapter
on double display (both monitor and LCD) and put a monitor on the vga
adapter it display's fine on the monitor and the LCD (but it's limited to
1024*768 because of the LCD).
I can set the adapter on "monitor only" which should make it work as a
normal PC-VGA adapter (I want to use 1280*1024).
If I launch Xconfigurator, it detects the monitor and the correct sync
info. However testing/running X just gives me a blank screen. Operating
info of the LG screen returns me an impossible sync frequency.
Going through the debug info of X, I see it detecting the LG and reporting
a "disabled" TFT/LCD. It even uses a correct sync mode... but it's not what
my screen is receiving. I can reproduce this in all resolutions (meaning
that even VGA does not work).
The resolutions do work in Windows.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Running Xconfigurator
2. Run test or start X
Actual Results: Blank screen
LG Studioworks 775N (17") monitor reports incoming Sync of 10Khz and 15Hz.
Expected Results: X on my screen
A collegue has the same problem using a Nokia 17" screen with an IBM
Thinkpad (ATI Rage Mobility). He's running Mandrake 8.0 and he tried both
4.0.3 ans 3.x drivers (with no success).
When booting in a framebuffer mode (vga=791), the console does display right
Starting X does not work.
So I guess it is not an adapter/driver error, but a problem with X.
Created attachment 33159 [details]
XFree.log when using a nokia monitor and the LCD screen switched off, selected resolution is 1024x768 (display not working)
Created attachment 33160 [details]
Please try the XFree86 4.1.0 update which we released for RHL 7.1 and 7.2
not long ago, and see if that resolves this issue for you.
RedHat 7.2 and Mandrake 8.1 behaves OK now on an IBM thinkpad with ATI Rage
It also works OK (more or less) on a Toshiba 8100 with a Savage 3D, only
quitting X give me a strange console back (but that could be because I didn't
upgrade the kernel...)
You may consider it resolved
Comment on attachment 33160 [details]
Comment for attachment Xfree86.log:
Xfree86.log when LCD display AND monitor is on. The LCD is the primary display,
but the nokia monitor perfectly displays the screen too. Switching the LCD
display off and the nokia screen keeps displaying normally (an LG monitor
looses picture at this point)