[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1221795
T
In finally managed to resolve the issue for my T430s. I had to add the
following boot options to /etc/default/grub:
acpi_osi='!Windows 2012'
- This makes the OSD work properly with 8 brightness steps
video.brightness_switch_enabled=0
- This allows you to have 15 brightness steps (working OSD also
For my Thinkpad T430s, I can confirm that adding acpi_backlight=vendor
as a grub boot option fixes the problem. I only have the Intel GPU
enabled.
However, applying this boot options result in the OSD not correctly
showing the current brightness state (s. attachment); it has always the
same state.
I will check 3.10 and earlier 3.11 RCs to see if I can narrow it down.
On 6 September 2013 11:47, Joseph Salisbury
wrote:
> Did this issue start happening after an update/upgrade? Was there a
> kernel version where you were not having this particular problem? This
> will help determine if the pro
BTW, this command line option (acpi_backlight=vendor) fixes the
problem so I am now not sure if this is a bug or not.
On 6 September 2013 13:00, Anmar Oueja wrote:
> I will check 3.10 and earlier 3.11 RCs to see if I can narrow it down.
>
> On 6 September 2013 11:47, Joseph Salisbury
> wrote:
>>
Did this issue start happening after an update/upgrade? Was there a
kernel version where you were not having this particular problem? This
will help determine if the problem you are seeing is the result of the
introduction of a regression, and when this regression was introduced.
If this is a regre
