Bug 37662 - Upgrade to version 2.6.38, disable the laptop display back light
Summary: Upgrade to version 2.6.38, disable the laptop display back light
Status: RESOLVED OBSOLETE
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 blocking
Assignee: drivers_video-dri
URL: https://bugs.launchpad.net/null/+bug/...
Keywords:
Depends on:
Blocks:
 
Reported: 2011-06-16 16:34 UTC by njin
Modified: 2013-12-23 13:52 UTC (History)
3 users (show)

See Also:
Kernel Version: 2.6.38 - 3.0.0
Tree: Mainline
Regression: Yes


Attachments
dmesg of 2.9.39-rc7 (246.48 KB, text/plain)
2011-06-16 16:34 UTC, njin
Details

Description njin 2011-06-16 16:34:25 UTC
Created attachment 62272 [details]
dmesg of 2.9.39-rc7

No backlight after updates on Acer Aspire 5732Z
Comment 1 njin 2011-06-16 16:36:02 UTC
Additional files, if needed on the linked launchpad report.
Thanks
Fabio
Comment 2 Len Brown 2011-06-21 01:48:19 UTC
attachment is full of these:

WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_gart.c:176 radeon_gart_bind+0x1ab/0x1c0 [radeon]()

I don't see a linked launchpad report.

moving this bug to DRM.
Comment 3 njin 2011-06-21 16:30:44 UTC
@ Len Brown
Go up and below assigned to there's the launchpad URL, if this is not the right procedure, please advice me.
Thanks
Fabio
Comment 4 Gary Liddle 2011-08-06 10:42:14 UTC
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/740893

Hey

I have the same laptop and have the same problem when i updated the Kernel.

I've been running 2.6.35.22 which has no problems.

I initially updated to 2.6.38-8 which i thought at first had failed, but noticed the screen was only usable (and i use that word very lightly) in direct sunlight.

I've now updated to 2.6.38-10 which has the same problem as 2.6.38-8, no back light on the monitor.

I'm currently viewing the laptop on 2.6.38-10 through an external monitor so i can try to resolve the problem and can run any diagnostic commands you require.

Please see the above launchpad link for all the debug information regarding this problem.

Thanks,
Gary
Comment 5 Alan 2013-12-23 13:52:20 UTC
If this is still present in modern kernels please update the bug

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