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* Re: Bug#587014: screen brightness can't be modified on some Panasonic laptops
@ 2010-12-29 15:24 Nicolas Limare
  2011-01-03  9:40 ` Thomas Renninger
  0 siblings, 1 reply; 9+ messages in thread
From: Nicolas Limare @ 2010-12-29 15:24 UTC (permalink / raw)
  To: 587014; +Cc: ben, laforge, platform-driver-x86, mjg59, cristopher.camacho

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I also received a message reportin for this bug on a Panasonic CF-52.

Can I in any way help this bug get more attention?

Just in case, I am at 27C3 now, with my laptop, so if anyone there
wants to directly investigate the issue just let me know.

-- 
Nicolas LIMARE
http://nicolas.limare.net/                         pgp:0xFA423F4F

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^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: Bug#587014: screen brightness can't be modified on some Panasonic laptops
@ 2011-01-15 13:01 Axel G. Rossberg
  0 siblings, 0 replies; 9+ messages in thread
From: Axel G. Rossberg @ 2011-01-15 13:01 UTC (permalink / raw)
  To: 587014; +Cc: Nicolas Limare, ben, laforge, platform-driver-x86

A solution for this problem that works for me (ubuntu 10.10,
2.6.35-24 kernel) is described here
http://ubuntuforums.org/showthread.php?t=1612560 

In a nutshell, add the boot option "acpi_osi=" to grub, by executing 

$ gksudo gedit /etc/default/grub

(which calls an editor) to replace in the file /etc/default/grub the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

with 

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="

Then execute 

$ sudo update-grub

and reboot.  Backlight-changing should now work seamlessly.

Axel

^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2011-01-15 13:10 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-12-29 15:24 Bug#587014: screen brightness can't be modified on some Panasonic laptops Nicolas Limare
2011-01-03  9:40 ` Thomas Renninger
2011-01-03 10:44   ` Nicolas Limare
2011-01-03 21:33     ` Matthew Garrett
2011-01-03 22:14       ` Cristopher Camacho
2011-01-03 22:18         ` Matthew Garrett
2011-01-03 22:23           ` Cristopher Camacho
2011-01-03 22:32             ` Matthew Garrett
  -- strict thread matches above, loose matches on Subject: below --
2011-01-15 13:01 Axel G. Rossberg

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