OS: Linux 2.6 (Fedora Core 3) Hardware: IBM ThinkPad R40 2681-Q6U Video Card: ATI Radeon Mobility 7500 Monitor: IBM ThinkPad 1400x1050 LCD Panel xorg-x11 RPM: 6.8.1-12 When booting up in graphical mode, horizontal lines will begin flickering in the display. The flickering lines become more and more frequent and the display begins to degrade to the point that it goes blank. However, the light in the LCD monitor is still on, because there is still a glow; it is just black. Pressing Ctrl+Alt+F2 while it is doing this does take me to a full-screen terminal; however, the flickering still continues until the screen goes completely blank. I have blindly logged in through the terminal to reboot the machine. At the grub boot loader, I can edit the kernel line, adding 'linux 3' to boot into runlevel 3. This works just fine, but I don't know where to go from here to find out more information as to why this is happening. I have examined /etc/X11/xorg.conf, but everything looks good (as far as I know). Adding 'nofb' to the kernel line in the boot loader doesn't seem to have any affect.
For reference, this bug is also listed in the RedHat bugzilla here: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=133147
Just wanted to point out that, in the morning (or anytime I start up the computer after it's been turned off for many hours), when I start up the machine, I can use the Linux (Fedora Core 3) partition for about 30 minutes with a nice, clear screen before the horizontal flickering lines begin to appear. Shortly after they appear, though, the screen begins to grow worse and worse with the lines until it's completely blank. I thought it might be a hardware problem, but the screen is fine on the Windows partition, so that makes me think it's a driver problem. Nevertheless, I'm going to try this later today or tomorrow on a brand new IBM R51 just to test the hardware theory.
FYI, I was unable to get one of the R51s to test this on, however, I'm not sure whether it would make much difference. The R51s we have use the IBM ThinkPad 1024x768 LCD Panels, whereas the R40 I'm trying to get this to work on uses an IBM ThinkPad 1400x1050 LCD Panel. Is the xorg driver made to handle such a high resolution on laptops? My monitor is the 15" Active Matrix XGA-TFT display (1400x1050). Most people who have Linux (Fedora Core 3) working on their IBM R40s are using the 15 or 14.1 inch display, XGA (1024 x 768). I'm not sure whether it makes a difference.
I am not having this problem with FC3 on a T42 with Radeon 9600 M10, 15.1 inch screen and 1400x1050. I am using the latest from devel tree which is 6.8.1-22. You may want to try this first.
I went to http://download.fedora.redhat.com/pub/fedora/linux/core/development/i386/Fedora/RPMS/ and grabbed the updated xorg-x11 RPMs, updating my installed RPMs from 6.8.1-12 to 6.8.1-22. After running 'rpm -Uvh xorg-x11-*.rpm' to upgrade/install all 18 RPMs, I rebooted the machine. The same issue continues to occur when the machine boots into runlevel 5 (GUI).
I know this isn't exactly a help forum, but I was wondering if anyone is actually working on this or having any luck with it? I'm still having this problem, and I'm having to use my Windows partition for work. I'd love to be able to use Linux again. Thanks!
Do you find any useful info in #1129?
(In reply to comment #0) > When booting up in graphical mode, horizontal lines will begin flickering in the > display. The flickering lines become more and more frequent and the display > begins to degrade to the point that it goes blank. However, the light in the LCD > monitor is still on, because there is still a glow; it is just black. > > Pressing Ctrl+Alt+F2 while it is doing this does take me to a full-screen > terminal; however, the flickering still continues until the screen goes > completely blank. I have blindly logged in through the terminal to reboot the > machine. You are saying that the flickering continues when you switch to a virtual console? This sounds like a hardware problem. I take it that runlevel 3 on your distro is a no-X runlevel. What happens if you boot to runlevel 3 and let the machine run for an hour? Or if you let the machine run at high CPU usage for an hour? Do you still see flickering?
Are you still experiencing this issue when using a current release of xorg?
Ping to the bug submitter!
Sorry about not responding. I submitted this problem a year and a half ago, and I no longer have access to the IBM Thinkpad R40 with the XVGA display, so I can't test it. It was owned by the company I worked for, and, since I no longer work for them, I can't use the laptop. :-)
As there are no hardware available where this bug occurs I'm closing the bug.
I'm not sure if I have the same problem, but I'm seeing screen flicker with a radeon 9250 and a x850xt on 1600x1200 with DRI enabled and doing some 3d stuff (like glxgears). But it only happens with the DVI connector. Anything I could try?
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