Ubuntu
linux package

  1. Bug #925690
  2. Comment #5

Comment 5 for bug 925690

Revision history for this message
Tim (tzakharov) wrote : Re: Screen brightness adjust hotkeys don't work with an Acer 5755G laptop

I've been affected by this bug in Ubuntu 10.04 and now Xubuntu 12.04. So this bug has existed at least since kernel 2.6. I have an Acer Aspire 7736Z laptop. The Fn-left/right arrow keys do bring up the sun icon and the brightness slider moves onscreen when I make like adjusting it, but the physical brightness never changes.

There is a workaround in Ubuntu Forums that involves adding this kernel parameter:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" acpi_backlight=vendor

Perhaps this could also be passed upstream to help them fix it in future releases...