** Changed in: linux (Ubuntu Vivid)
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1646537
Title:
Backlight sometimes fails to resume from
Found another machine and restored the factory image, but still can't
reproduce this issue.
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https://bugs.launchpad.net/bugs/1646537
Title:
Backlight sometimes fails to
I got the same machine and restored the system to factory image.
After doing some check and write some intel reg value for testing, then I can't
reproduce this issue any more, even do a cold boot or restore the image again.
BTW, the patched kernel on #4 seems doesn't help.
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The 2 i915 patches can't be backported to 3.19 kernel, so I use another way to
archive the same function.
The test kernel could be found here, I'll try to see if we could find a machine
here to verify it.
http://people.canonical.com/~acelan/bugs/lp1646537/
** Changed in: linux (Ubuntu Vivid)
** Changed in: linux (Ubuntu Vivid)
Assignee: (unassigned) => AceLan Kao (acelankao)
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1646537
Title:
Backlight sometimes fails to
This is actually a kernel bug where the PWM isn't saved. It affects the
specific display type in this machine. It's been fixed upstream
already, and was brought into Ubuntu 16.04 (See SRU
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1625932).
The Precision 5510 however ships with Ubuntu
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