[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete = Expired
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** Changed in: linux (Ubuntu)
Status: Triaged = Incomplete
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Title:
[HP EliteBook Folio 9470m Notebook PC] Backlight does not work on
FYI, I have experienced this again. It seems to only happen on resume
from suspend.
Excerpts from Joseph Salisbury's message of 2014-05-13 18:34:24 UTC:
** Changed in: linux (Ubuntu)
Status: Triaged = Incomplete
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I'd like to perform a bisect to figure out what commit caused this
regression. We need to identify the earliest kernel where the issue
started happening as well as the latest kernel that did not have this
issue.
Can you test the following kernels and report back? We are looking for
the first
Trying 3.12 now. Note that I discovered a new symptom today: when a
monitor is plugged into the DisplayPort, the brightness controls in
Brightness and Lock work, but the keyboard controls still don't work.
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Backlight controls work flawlessly with 3.12 final.
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Title:
[HP EliteBook Folio 9470m Notebook PC] Backlight does not work on
intel driver
Actually.. this is quite embarrassing, I installed 3.12, but my system
didn't show a grub menu and I actually booted 3.13.0-24-generic
Not sure how that happened, but it actually appears that the issue has
gone away somehow. Could still be a race maybe?
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Hmm, do you still have acpi_backlight=vendor? If not, I guess it would
be good to test the 3.13.0-24-generic kernel for a while to ensure the
bug doesn't come back.
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Excerpts from Joseph Salisbury's message of 2014-04-23 18:46:43 UTC:
Hmm, do you still have acpi_backlight=vendor? If not, I guess it would
be good to test the 3.13.0-24-generic kernel for a while to ensure the
bug doesn't come back.
I do not.
I wonder if it is also possible that I booted
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.15 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
Tested with 3.15-rc2, backlight control still did not work.
** Tags added: kernel-bug-exists-upstream
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Title:
[HP EliteBook Folio 9470m
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