Bug#572047: xserver-xorg-video-intel: Image distortion and short-term dropouts (black screen) in X

["Singer, Michael" <info@sinweb.de>]

Am Montag 01 März 2010 10:41:43 schrieb Brice Goglin:
> Singer Michael wrote:
> > Package: xserver-xorg-video-intel
> > Version: 2:2.9.1-2
> > Severity: normal
> >
> >
> > Since installing the kernel 2.6.33, I have under X dropouts about every
> > 10 seconds the screen (black screen), and visible image disturbances.
> > Under these conditions, it can not be working on the PC. With the kernel
> > 2.6.32, I have no such problems.
> 
> So the bug is in the kernel ? Not in xserver-xorg-video-intel ?
> 
> Brice
> 
Hello Brice,
Unfortunately, I still have problems with xorg and the new kernel 2.6.33, but 
I have done some analysis and found the following errors.

1. with the boot parameters (grub) "i915.modeset = 0" I have the black screens 
do not proof, but unfortunately not whether the other effects have resulted.

2. Some times it is already (even with boot parameter "i915.modeset = 0") my 
system shortly after the start was very slow. Here are my log entries 
following notice in the Xorg.0.log.

----------------- Start -----------------
# grep ^\(EE \) /var/log/Xorg.0.log
(EE) open / dev/fb0: No such file or directory
(EE) intel (0): [drm] Failed to open device for DRM: No such file or directory
(EE) intel (0): Failed to become DRM master.
(EE) intel (0): Failed to initialize kernel memory manager
(EE) EVIOCGNAME ioctl failed: Inappropriate ioctl for device
(EE) PreInit returned NULL for "Logitech USB Receiver" "
(EE) EVIOCGNAME ioctl failed: Inappropriate ioctl for device
(EE) PreInit returned NULL for "Macintosh mouse button emulation" "
-----------------End-----------------

A reboot fixed the problem and it was only a part of the error messages in the 
Xorg.0.log to see:

----------------- Start -----------------
# grep ^\(EE \) /var/log/Xorg.0.log
(EE) EVIOCGNAME ioctl failed: Inappropriate ioctl for device
(EE) PreInit returned NULL for "Logitech USB Receiver" "
(EE) EVIOCGNAME ioctl failed: Inappropriate ioctl for device
(EE) PreInit returned NULL for "Macintosh mouse button emulation" "
-----------------End-----------------

Unfortunately I can not reproduce the problem, since it is uncommon. Whether 
it's on 2.6.33 kernel or xorg is I can not conclude.

Here is an excerpt from my /boot/grub/menue.lst so you can understand what 
boot parameters I am experiencing the above described problem.

----------------- Start -----------------
title           Debian GNU/Linux, kernel 2.6.33-0.slh.4-sidux-amd64
root            (hd0,4)
kernel          /vmlinuz-2.6.33-0.slh.4-sidux-amd64 root=/dev/mapper/sysvg-
LVroot ro quiet vga=791 i915.modeset=0
initrd          /initrd.img-2.6.33-0.slh.4-sidux-amd64
-----------------End-----------------

Regards
Michael