Created attachment 62272 [details]
dmesg of 2.9.39-rc7
No backlight after updates on Acer Aspire 5732Z
Additional files, if needed on the linked launchpad report.
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.
@ Len Brown
Go up and below assigned to there's the launchpad URL, if this is not the right procedure, please advice me.
I have the same laptop and have the same problem when i updated the Kernel.
I've been running 18.104.22.168 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.
If this is still present in modern kernels please update the bug