Ubuntu
xorg package

brightness applet causes desktop to lag

Bug #256552 reported by Luka Napotnik
4
Affects Status Importance Assigned to Milestone
xorg (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

Binary package hint: acpi

When I try to change the LCD brightness on my laptop with the brightness applet, the scroll bar moves uncontrolled up and down after moving it just a little bit. The desktop begins to lag. If I watch a movie and adjust brightness, the movie will get partially unresponsive. That is happening for some seconds. When stopped, the brightness changes and the desktop stops to lag.

I'm using Intrepid with the latest updates. I could change the brightness with the applet on Hardy with no problems.
[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 03)
     Subsystem: Fujitsu Siemens Computers Device [1734:1108]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 03)
     Subsystem: Fujitsu Siemens Computers Device [1734:1108]

See original description
Revision history for this message
Andreas Moog (ampelbein) wrote :

Thanks for taking the time to report this bug. Unfortunately we can't fix it, because your description didn't include enough information.

Please include the following additional information:

1. Please include the output of the command "uname -a" in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command "lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.

Changed in acpi:
status: New → Incomplete
Revision history for this message
Luka Napotnik (luka-napotnik) wrote :

$ uname -a
Linux luka-laptop 2.6.26-5-generic #1 SMP Sun Aug 10 20:30:28 UTC 2008 i686 GNU/Linux

Revision history for this message
Luka Napotnik (luka-napotnik) wrote :
Revision history for this message
Andreas Moog (ampelbein) wrote :

Please attach also the files:

/etc/X11/xorg.conf
/var/log/Xorg.0.log

after you had such a lag. Thank you.

Revision history for this message
Luka Napotnik (luka-napotnik) wrote :
Revision history for this message
Luka Napotnik (luka-napotnik) wrote :
Revision history for this message
Andreas Moog (ampelbein) wrote :

I'm confirming this bug report, since all needed Information is now available.

From xorg.0.log:

(EE) intel(0): underrun on pipe B!
(EE) intel(0): underrun on pipe B!
(WW) intel(0): Fail to clip video to any crtc!
(WW) intel(0): Fail to clip video to any crtc!

From lspci-vvnn:

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 03)

Changed in acpi:
status: Incomplete → Confirmed
Revision history for this message
Andreas Moog (ampelbein) wrote :

Changing Package to xorg, since it is a x11-issue.

Bryce Harrington (bryce)
description: updated
Revision history for this message
Luka Napotnik (luka-napotnik) wrote :

brightness works for me now

Changed in xorg:
status: Confirmed → Fix Released
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