https://bugzilla.kernel.org/show_bug.cgi?id=25482
Summary: Backlight hotkeys behave erratically on FSC Esprimo
Mobile U9200
Product: ACPI
Version: 2.5
Kernel Version: 2.6.35
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ACPICA-Core
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: Yes
Created an attachment (id=41372)
--> (https://bugzilla.kernel.org/attachment.cgi?id=41372)
working rc3 kernel, /proc/modules
New here, thank you for your patience.
The laptop is a Fujitsu-Siemens Esprimo Mobile U9200, while setting the
backlight through software (sysfs, KDE's powerdevil) works fine, the brightness
hotkeys don't behave as they should - intead of increasing/decreasing the
brightness level by 1 step, down decreases the rightness by 2 steps, while up
momentarily increases the brightnes (presumably by 2 steps), then immediately
reverts to previous value, making it nigh impossible to increase brightness
with keyboard. (Side note: kernel from previous ubuntu installation behaved
similarly wrt. 2-step increments, but I at least managed to increase brightness
by holding the up key down.)
The keys behave(d) normally
1) during POST and GRUB (and in Windows)
2) in 'buntu 8.04 - kernel 2.6.24
3) in mainline kernel version 2.6.35-rc3 provided by Ubuntu here>
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.35-rc3-maverick/
I reported the bug against ubuntu kernel here>
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/629358 the mainline kernel
behaves the same way but tell me if you need more/stable mainline kernel's
output. The important part of that report is probably that in the working rc3
(mainline), showkey -s reported nothing on pressing the keys, while a quick
keypress produces 4 codes from the down key and 8 codes from the up key both in
ubuntu kernel and in mainline stable:
# single brightness-down
0xe0 0x4c 0xe0 0xcc
#single brighness-up
0xe0 0x54 0xe0 0xd4 0xe0 0x4c 0xe0 0xcc
--
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
------------------------------------------------------------------------------
Learn how Oracle Real Application Clusters (RAC) One Node allows customers
to consolidate database storage, standardize their database environment, and,
should the need arise, upgrade to a full multi-node Oracle RAC database
without downtime or disruption
http://p.sf.net/sfu/oracle-sfdevnl
_______________________________________________
acpi-bugzilla mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
