Hello, Sorry to "hijack" this thread, but I'd like to know if it is probably the same problem I am experiencing on the same machine, see: https://bugs.freedesktop.org/show_bug.cgi?id=35812 Just because I seem to be sooo alone out there with that problem :-(. Thanks, Georg On Tue, Jun 26, 2012 at 10:05 PM, Daniel Vetter <daniel at ffwll.ch> wrote: > On Tue, Jun 26, 2012 at 03:08:32PM -0400, Giacomo Comes wrote: >> I have a dell latitude E6420 with Sandybridge Mobile (GT2). >> Since I got it (about one year ago), it has been a nightmare to run linux on it. >> At the beginning I installed openSUSE 11.4 (kernel 2.6.37.6) and the laptop >> would freeze almost immediately. After that I waited for newer kernels in order to >> see if things would improve. They did improve indeed and finally with kernel 3.0 >> I was able to run linux (openSUSE 11.4) without laptop freeze or screen issue. >> Unfortunately, the only kernel that works with my laptop is 3.0. Newer kernel >> (3.1, 3.2, 3.3 and 3.4) do not work. >> This is what happen if I run kernel 2.6.39, 3.1, 3.2, 3.3 and 3.4: >> The laptop boot and does the boot process fine. At the end of the boot process X >> starts and here the problem appears (about 50% of the times): >> the screen goes black on the left side (about 2/3 of the whole screen) with white >> stripes to the right side (the remaining 1/3). >> The laptop is not dead: I can remotely login or I can perform a clean shutdown >> if I press the power button, but the screen is totally dead. >> Another strange issue is that after a bad boot (with the black screen) at the >> next reboot the screen will start to flicker. The flickering will last some time >> and it will become less intense as the time goes until it will disappear completely. >> The funny thing is that the intensity of flicker depends on how long I keep the >> black screen. If, after the boot process, the black screen appears and I reboot >> the laptop immediately, then the flicked is moderate and it disappear after >> 1 or 2 minutes. If I keep the black screen for 1 minute or more, then after the >> reboot the flicker is very intense and it takes much more to fade. >> >> Right now I run openSUSE 12.1 on the laptop, but I had to perform the following >> trick: because openSUSE 12.1 ships with kernel 3.1, in order to make openSUSE run on my >> laptop I have the options: >> 1) downgrade to kernel 3.0 (I use 3.0.7) >> 2) recompile the openSUSE kernel 3.1 replacing the directory drivers/gpu/drm/i915 >> with the content of the same directory from kernel 3.0 source tree. >> >> I choose the second option as I can run the latest openSUSE kernel with patches >> and fixes. >> >> I have searched google to see if other users have my same problem and >> I have found few references to a problem similar to mine: >> >> http://lists.freedesktop.org/archives/intel-gfx/2011-March/009822.html >> http://www.gossamer-threads.com/lists/linux/kernel/1474140 >> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/794474 >> >> But in none there is a mention on how to fix the problem. >> >> Is there any chance to improve the intel kernel driver to make it work >> for my laptop as it was in kernel 3.0? > > Sure, we're always working to fix odd bugs ;-) > >> I can provide any information/testing as needed. > > A few things for you to do, pretty much random order: > - Can you try out the latest drm-intel-next-queued branch from the > ?drm-intel git repo at: > > http://cgit.freedesktop.org/~danvet/drm-intel > > ?This is the basic step to ensure that we haven't fixed your bug already > ?in the latest code. > - Please attach xrandr --verbos and full dmesg when booting with > ?drm.debug=0xe (take a working kernel, doesn't matter that much). > - If you can, please bisect which commit exactly introduced the regression > ?betwen 3.0 and 3.1. That usually helps a _lot_ in tracking down these > ?bugs. > > Yours, Daniel > -- > Daniel Vetter > Mail: daniel at ffwll.ch > Mobile: +41 (0)79 365 57 48 > _______________________________________________ > Intel-gfx mailing list > Intel-gfx at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
