Red Hat Bugzilla – Bug 221570
Fn+Home (change LCD brightness) crashes X on Thinkpad T60
Last modified: 2007-11-30 17:07:39 EST
Description of problem:
The function key for tuning LCD panel (Fn+Home) on ThinkPad T60
will always crashes X.org under FC6 and RHEL 5 beta 2
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot to kernel-xen (version 2.6.18-2747-el5xen)
2. Wait until gdm login screen appears
3. Press "Fn"+"End" to tune the LCD panel a bit darker
4. Press "Fn"+"Home" to tune the LCD panel a bit brighter
5. It will crash at once
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.
The Fn+Home event crashes X even with the normal non-xen kernel. Ubuntu says
it's caused by the broken video kernel module and blacklisting it solves the
It's needed to say that that removing the video module (at least on FC6) causes
the acpi events from the Fn+Home keys not to be processed at all, what is not
really a fix. It gives some clue though.
It crashes regardless the X is in the VESA mode or with the fglrx binary drivers
Are we talking about this
Does adding this option to /etc/X11/xorg.conf, the device section makes things work?
Option "BIOSHotkeys" "on"
Adding this option to the "Device" section did not help.
X still keeps crashing with Fn+Home, sorry. The bug on freedesktop doesn't seem
to be related as the problem described there is reported for T42 and Fn+F7
(switch to the external monitor) and Fn+F7 doesn't crash X on my T60.
Thanks for the effort.
A new BIOS released several weeks ago for T60/T60p, and after updating the BIOS,
the problem changed.
Before: Fn+Home = crash
Now: Fn+End = crash
Even with BiosHotKeys option.
Moreover, the problem only exist with Xorg driver, if use fglrx, it is OK.
Could you please attach your xorg.conf here so that I see what is different in
my setup? My T60 keeps crashing even with fglrx.
Since this bugzilla report was filed, there have been several major updates,
which may have resolved this issue. Users who have experienced this problem are
encouraged to upgrade their system to the latest version of their distribution
Please, if you experience this problem on the up-to-date system, let us now in
the comment for this bug, or whether the upgraded system works for you.
On a Thinkpad T60 the problem does *not* occur any longer. The bug seems to be
Thank you very much, closing per repoter's information.