Created attachment 64208 [details] Logfiles and a screenshot of the black screen with a right-sided white bar Hi There is a weird problem on my notebook, which is a quite new Samsung model with Intel i5 processor and Intel chipset running Kubuntu 12.04 x64 with latest updates. Kubuntu is configured not to suspend when the notebook lid is getting closed. Closing the notebook lid just switches off the diplay. The problem happens after reopening the lid after a while. Sometimes it appears a black screen with a right-sided white bar from the top to the lower end (see attachment for screenshot). If the problem happens, the notebook doesn't react on pressing (hot)keys or moving mouse. It's just like dead, but i've found out that closing the lid once more in such a case and waiting a while again may let the black screen disappear at the next time i open the lid. Thanks for your help! Regards, Ettore Atalan
First thing to check would be whether this still occurs with updated drivers, focusing primarily on getting a more recent kernel.
Created attachment 64430 [details] xserver-xorg-video-intel 2.19.0 I've updated to latest mainline kernel for my distribution [1] and to X.org Intel graphics driver 2.19.0 [2], but the problem is still present. [1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-rc6-precise/linux-image-3.4.0-030400rc6-generic_3.4.0-030400rc6.201205061835_amd64.deb [2] see attachment Regards, Ettore Atalan
I've made a test with a playing audio file and a closed notebook lid. After reopening the lid the black screen appeared, but it was still possible to adjust the volume via the volume keys on the keyboard. However, Ctrl+Alt+F1 doesn't work. Graphics has problems, but the rest seems to be ok. Regards, Ettore Atalan
Can you please test 3.6-rc2? That contains a few fixes to the backlight code, which sounds rather relevant here ... Also please attach full dmesg with drm.debug=0xe added to your kernel commandline (and please attach it as an individual text/plain file, much easier to handle).
I think i have forgotten to write that changing brightness of the backlight doesn't work. When trying to change brightness the screen flickers, but the brightness won't change. Regards, Ettore Atalan
Created attachment 66024 [details] dmesg running Linux 3.6-rc3 Today, I gave Kernel 3.6-rc3 a try, but the result was sobering. The Kernel 3.6-rc3 booted up, but there was - no more network connection - no more external mouse support - still no working backlight control - etc. I have attached the dmesg running Linux 3.6-rc3. Regards, Ettore Atalan
Is somebody still analyzing the cause for this bug? Thanks for the help! Regards, Ettore Atalan
Sorry for the delay, but can you please try and grab a dmesg off the most recent stable kernel for your distro? Or a mainline, or drm-intel-experimental?
When grabbing that dmesg, please boot with drm.debug=0xe added to your kernel cmdline, thanks.
Ettore, please do try a recent kernel and grab a full drm.debug=6 dmesg. If it is still occuring, please reopen.
Since updating on kernel 3.5.0 (Kubuntu 12.10) it is not yet occurred again.
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