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[Bug 711339] New: Adjusting LCD brightness doesn't work after suspend
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 9 Aug 2011 18:52:08 +0000
  • Message-id: <bug-711339-21960@http.bugzilla.novell.com/>

https://bugzilla.novell.com/show_bug.cgi?id=711339

https://bugzilla.novell.com/show_bug.cgi?id=711339#c0


Summary: Adjusting LCD brightness doesn't work after suspend
Classification: openSUSE
Product: openSUSE 12.1
Version: Factory
Platform: x86-64
OS/Version: openSUSE 11.4
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Mobile Devices
AssignedTo: mobile-bugs@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: kaelinphilipp@xxxxxxxxx
QAContact: qa@xxxxxxx
Found By: ---
Blocker: ---


Created an attachment (id=445026)
--> (http://bugzilla.novell.com/attachment.cgi?id=445026)
dmesg

User-Agent: Opera/9.80 (X11; Linux x86_64; U; de) Presto/2.9.168
Version/11.50

After a fresh restart the adjustment of the lcd brightness works correctly.
After putting the system to suspend this won't work. Also after a second time
putting to suspend it won't work.

Reproducible: Always

Steps to Reproduce:
1. Restart if you've done a suspend recently.
2. Try Adjusting brightness (on my Notebook using Fn+F6/F7), this should work.
3. Put the system to suspend mode.
4. Wake up the system from suspend and try the steps named in 2 again
Actual Results:
In both cases (before and after suspend) the KDE brightness widget is shown
correctly but brightness won't change after suspend.

Expected Results:
Adjusting brightness should work like after a fresh restart.

System:
Toshiba Tecra R850-11M
openSuse 11.4 / 2.6.37.6-0.7-desktop / KDE 4.7

The actual state is also after a suspend shown correctly in the following file:

cat /proc/acpi/toshiba/lcd
brightness: 5
brightness_levels: 8

When adjusting the brightness using the keys the value in the file above is
actualized corrctly.

In /var/log/messages and dmesg (also as attachment) the following line appears:
Aug 9 20:38:02 linux-h81p kernel: [ 899.913018] ACPI: Failed to switch the
brightness

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