Red Hat Bugzilla – Bug 97005
Video sync lost on IBM ThinkPad T30
Last modified: 2007-04-18 12:54:41 EDT
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3.1) Gecko/20030527 Debian/1.3.1-2 Description of problem: I am running a standard RH 9 installation on an IBM ThinkPad T30 Mod 2366-97G. The grafics hardware is identified by lspci as: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500] When the system isn't touched for a while and the screen blanking kicks in then when the mouse is moved or a key is pressed the video comes back out of sync. The same effect can be forced by pressing Fn-F3 (which explicitly turns the LCD off). Other than terminate/restart of X11 or rebooting the system the only method that resyncs the screen is to go through a suspend/resume cycle via Fn-F4 key combination. In addition to this problem, the Fn-F7 that is supposed to cycle from LCD -> LCD+CRT -> CRT is a dead key that does not have any effect. The video signal is always sent to both, the LCD and the external CRT. Unfortunately switching to a lower resolution does not seem to reduce the horizontal sync frequency at all which is very bad if one needs to connect to a projector that doesn't sync at the higher frequency. Very interesting is that booting a Knoppix-3.2 CD which also comes with XFree86-4.3.0 does _NOT_ exhibit this problem. Fn-F3 works just fine and so does screen blanking as a result of being idle for a while. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. startx 2. press Fn-F3 to turn the LCD off 3. press any key to turn the LCD back on alternatively: just wait till screen blanks automatically Actual Results: the result is a video screen that has lost synchronization Expected Results: cleanly synced video display Additional info:
Sounds like a non-XFree86 problem, possibly kernel, possibly kernel/X/BIOS interaction. Please upgrade to Fedora Core 2 and if the problem persists, test xorg-x11 from rawhide. If it still occurs, please file a bug report in upstream X.Org bugzilla at http://bugs.freedesktop.org in the "xorg" component, and if you paste the URL here, we will track the issue in upstream bugzilla. Thanks in advance for testing rawhide xorg. Setting status to "RAWHIDE"