I have this problem on a HP Zbook 15 with kernel 3 .11.0-17-generic
#31~precise1-Ubuntu SMP Tue Feb 4 21:25:43 UTC 2014 x86_64 x86_64 x86_64
GNU/Linux
However if I use KDE the keyboard controls change the screen brightness. It
seems it's not only a kernel matter.
It's KDE 4.8.5.
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You
Paolo Montrasio, thank you for your comment. So your hardware and problem may
be tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please
The fix in the upstream 3.14-rc2 kernel has been removed and replaced
with a better one in the upstream 3.14-rc4 kernel by these two commits:
commit bd8ba20597f0cfef3ef65c3fd2aa92ab23d4c8e1 - ACPI / video: Filter the _BCL
table for duplicate brightness values
commit
** Tags removed: kernel-fixed-upstream-v3.14.0-031400rc2-generic
** Tags added: kernel-fixed-upstream-3.14-rc2
** Changed in: linux (Ubuntu)
Status: Incomplete = Triaged
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The fix is not perfect: the machine (running kernel
v3.14.0-031400rc2-generic) does not remember the user-set value of the
brightness. After reboot the brightness is set on its maximum.
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The latest mainline kernel 3.14.0-031400rc2-generic fixed the bug. I
can now controll brightness both using the Control Center and also the
Fn F9 and Fn F10 key strokes. I added appropriate tags to the bug.
** Tags added: kernel-fixed-upstream kernel-fixed-
upstream-v3.14.0-031400rc2-generic
It now became possible to boot a live DVD of the latest development
release of ubuntu (64 bit) on my HP ZBook. I installed this system of
the machine's HDD. I have applied all available updates via the
UpdateManager.
The brightenss problem remains.
Afterwards I tested also the latest mainline
ebutler / Barney, thank you for your comment. So your hardware and problem may
be tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please
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