Hi Jackson and others,
I have seen many variations of this bug being posted in Launchpad,
regarding different laptops.
But here's one quite coherent one:
https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/527157
Some other occurrances of the same problem:
https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/802276
https://bugs.launchpad.net/gnome-power/+bug/839281
https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/839788
https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/1000270
Then there is an AskUbuntu thread which lists the typical workarounds:
http://askubuntu.com/questions/173921/why-does-my-thinkpad-brightness-control-skip-steps/178003
Best regards,
Joonas Saarinen
On 2014-11-24 23:56, Jackson Doak wrote:
Has a launchpad bug been created for this?
On Thursday, November 13, 2014, Joonas Saarinen <[email protected]
<mailto:[email protected]>> wrote:
Hi,
For years, Ubuntu has had this bug where a lot of laptops react to
brightness adjustment in steps of 2 (or even 3). I believe this is
not by design (correct me if wrong).
It seems that the brightness keypress is handled in multiple places.
Possibly the OS does the adjustment, but does not consume the event
and then BIOS does another adjustment.
Some machines can be fixed with this trick:
# echo N > /sys/module/video/parameters/__brightness_switch_enabled
Are there plans to fix this bug? It's quite obvious one and
immediately strikes you when you install and start using Ubuntu on a
laptop.
Some affected laptops: Dell E4300, Asus F200CA, HP 6910p, Fujitsu
E751...
Joonas Saarinen
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