Thanks. I updated my bios using freedos (which was surprisingly easy to
do!).
sudo dmidecode -s bios-version sudo dmidecode -s bios-release-date
V1.30
08/13/2012
This does not fix the problem. If I restart my laptop without the
workaround, the effect is still the same. When I change brightness,
Merlijn Sebrechts, the issue you are reporting is an upstream one. Could
you please report this problem to the appropriate mailing list (linux-
acpi) by following the instructions _verbatim_ at
https://wiki.ubuntu.com/Bugs/Upstream/kernel ?
Please provide a direct URL to your e-mail to the
Merlijn Sebrechts, as per http://us.acer.com/ac/en/US/content/drivers an update
to your BIOS is available (1.30). If you update to this following
https://help.ubuntu.com/community/BIOSUpdate does it change anything? If it
doesn't, could you please both specify what happened, and provide the
Did this issue occur in a previous version of Ubuntu, or is this a new
issue?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.18 kernel[0].
If this bug is fixed in the mainline kernel, please add
** Tags added: kernel-bug-exists-upstream
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Title:
Screen brightness not working acer aspire 5742
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This is the first version of Ubuntu I installed. I do not know if this
is a regression.
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https://bugs.launchpad.net/bugs/1399611
Title:
Screen brightness not working acer aspire 5742
removing the workaround (intel.conf file in
/usr/share/X11/xorg.conf.d/) and booting with the latest vivid kernel
(3.18.0-031800rc7-generic #201411302035) did not fix the problem.
Can someone explain me why the workaround works? Is the brightness
normally handled by the kernel and does my
