*** This bug is a duplicate of bug 941286 ***
https://bugs.launchpad.net/bugs/941286
** This bug has been marked a duplicate of bug 941286
Setting brightness doesn't work out of the box on Acer Extensa 5235
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Bugs,
Hi! Ok, here are my results:
ls /sys/class/backlight without extra boot parameters: acpi_video0
acpi_video1 intel_backlight
ls /sys/class/backlight with acpi_backlight=vendor boot parameter:
acer-wmi intel_backlight AND backlight control WORKS!
I also tried kernel
Oh, and adding acpi_osi=Linux also works!
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https://bugs.launchpad.net/bugs/882506
Title:
Brightness control broken on Acer TimelineX 3820TG using Intel IGP
To manage notifications
Carl Englund, could you also please attach the following as separate
attachments:
acpidump acpidump.dat
dmidecode dmidecode.log
** Description changed:
- Brightness control workaround adding acpi_backlight=vendor to kernel
- boot parameters works...BUT - when system shuts down screen after
Triaged Low as mainline tested and easy workaround available.
** Changed in: linux (Ubuntu)
Importance: Undecided = Low
** Changed in: linux (Ubuntu)
Status: Incomplete = Triaged
** Also affects: linux
Importance: Undecided
Status: New
** Tags added: hw-specific kernel-acpi
Carl Englund, thank you for reporting this and helping make Ubuntu better. This
bug was reported a while ago and there hasn't been any activity in it recently.
We were wondering if this is still an issue? If so, please answer the following
questions:
+ Could you please report the results
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https://bugs.launchpad.net/bugs/882506
Title:
Brightness control broken on Acer TimelineX 3820TG using Intel IGP
To manage notifications about this bug go to:
** Changed in: linux (Ubuntu)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/882506
Title:
Brightness control broken on Acer TimelineX 3820TG using Intel IGP
To
Would it be possible for you to test the latest upstream kernel? It
will allow additional upstream developers to examine the issue. Refer to
https://wiki.ubuntu.com/KernelMainlineBuilds . If possible, please test
the latest kernel (Not a kernel in the daily directory). Once you've
tested the
