Description of problem: Since version 2.2.1-1 the i810 drives constantly gives me a blacked out screen, with no or very very little backlight. It still works though, I can reboot if I can find the cursor in the blackness (GDM greeter is barely visible) or switch to a console and type in the blind. I tried later versions of 2.2.1-X all have the same problem. Version-Release number of selected component (if applicable): 2.2.1-X How reproducible: Always. Steps to Reproduce: 1. Boot. Actual results: GDM is very dark, no backlight. Driver unusable. Expected results: Backlight. Additional info: Switching back to 2.2.0-4 works flawlessly. Anything backlight-related or DDC thing got messed up in 2.2.1? Perhaps I need to take this upstream :-/ This is a HP Compaq nc2400 lspci gives 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) Some lspci -n -v figures: 00:02.0 8086:27a2 (rev 03) Subsystem: 103c:30a1 00:02.1 8086:27a2 (rev 03) Subsystem: 103c:30a1
Thanks for the bug report. We have reviewed the information you have provided above, and there is some additional information we require that will be helpful in our diagnosis of this issue. Please attach your X server config file (/etc/X11/xorg.conf) and X server log file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file attachments using the bugzilla file attachment link below. Could you please also try to run without any /etc/X11/xorg.conf whatsoever and let X11 autodetect your display and video card? Attach to this bug /var/log/Xorg.0.log from this attempt as well, please. We will review this issue again once you've had a chance to attach this information. Thanks in advance.
If you can manage to log in, can you try to do a `xrandr -o inverted ; xrandr -o normal` and see if it helps? If so, you're probably hitting http://bugs.freedesktop.org/show_bug.cgi?id=14721
Created attachment 297369 [details] xorg.conf Same problem here with a Thinkpad T61. Backlight stays off after gdm loads. Typing "xbacklight -set 100" blind into a gnome-terminal after logging in works around it.
Created attachment 297370 [details] Xorg.0.log Here is the Xorg.0.log when using the standard kernel (i.e. not the new i915.modeset=1 stuff). Interestingly, this problem doesn't happen with i915.modeset=1 turned on.
Created attachment 297604 [details] Xorg.0.log without config file This is a log taken without any xorg.conf file (as can be verified by the (EE) message). The bahaviour changed now! Now the screen come on but whenever you press Ctrl+Alt+F1 to switch to a console, the screen backlight dies in the same manner that it died spontaneously before.
No, wait the behaviour does not change. I should be VERY clear of how the problem manifests: The FIRST TIME an X server starts up, backlight is on. If you stop the X server and then starts another one, it goes off. If you start an X server and tries to switch to a console, it goes off. The reason I thought the behaviour changed was that I booted the kernel into single-user mode and then started X with "init 5". This way the initial RHGB X server is never run (this normally works) so the first X server session started is the one running GDM and the first login screen. Fast-user-switch (which opens a secondary X server) also kills the backlight.
Workaround (tested successfully on thinkpad x61s): Boot into init 3 by appending '3' to the kernel grub line. Then login as root, 'modprobe video' and 'init 5' and the backlight should work as normal. For some reason the 2.6.25 rawhide kernels don't autoload the 'video' kernel module like the fc8 kernels.
*** Bug 437600 has been marked as a duplicate of this bug. ***
*** Bug 437518 has been marked as a duplicate of this bug. ***
I can confirm that the workaround in comment #7 works for me on a T61.
*** Bug 436636 has been marked as a duplicate of this bug. ***
This is probably related to the upstream bug http://bugs.freedesktop.org/show_bug.cgi?id=13743
There are some patches attached to bug 436636
xorg-x11-drv-i810-2.2.1-15.fc9 fixed this on my machine.
xorg-x11-drv-i810-2.2.1-15.fc9 works for me too. GOOD WORK!
*** Bug 439063 has been marked as a duplicate of this bug. ***