Maybe you should update your BIOS. I upgraded to 2.31 on my 5810T and all the backlight issues are gone with Ubuntu *and* Fedora 12.
2009/11/26 JimboJones <[email protected]>: > FWIW, I disabled all the powersaving "features" in KDE via the System > Settings module, and killed the KDE battery monitor in task manager and just > use gnome-power-manager. > > With gnome-power-manager the backlight keys work, the screen dims > automatically, etc. Of course, I've also got the nomodeset and > acpi_baclight=vendor as kernel boot params. I read on lesswatts.org that gpm > is always waking the CPU, but I don't have that issue on my machine. > > There is some backlight flickering sometimes. > 4810T, 1.10 BIOS, Fedora 12 beta. > > Jim > > On 11/16/2009 04:33 PM, Miguel Branco wrote: > > @Dan > Thanks for the reply. I'm using Ubuntu Karmic with kubuntu-desktop installed > on top. > I bricked my first timeline on a BIOS downgrade so I'm not feeling too bold > on trying an upgrade. My BIOS (for the 4810t) is 1.10. > > @Thomas > Add the following to the GRUB_CMD_LINUX_DEFAULT entry in /etc/default/grub: > nomodeset acpi_backlight=vendor > > and then run sudo update-grub on the terminal. > > This fixed it all in gnome for me and others. > > > > On Mon, Nov 16, 2009 at 23:13, Dan LeVasseur <[email protected]> wrote: >> >> What version are you using? With my 4810tz BIOS 1.3 Kubuntu 9.10 the >> brightness keys worked out of the box and incremented levels 20 at a time. >> Adding the nomodeset.... allowed me to change increments by 10. >> >> Might be BIOS that fixed it. >> >> -Dan >> >> On Mon, Nov 16, 2009 at 2:50 PM, Miguel Branco <[email protected]> wrote: >>> >>> Hello there, >>> I'm happy with my 4810T so far, I have no noise at all and almost >>> everything works. >>> However, while the 'nomodeset acpi_backlight=...' fix for the backlight >>> is perfect in Gnome, it doesn't work at all in KDE. >>> >>> The script fix works, but it's unpractical to input the password each >>> time you want to change the brightness. >>> I'm not even mentioning that you lose the option of using the built in >>> sliders. >>> >>> Does anyone know another option or hybrid way that works on KDE? I'd even >>> be happy if I could say setpci doesn't need sudo. >>> >>> Thanks, >>> Miguel >>> >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~acertimeline >>> Post to : [email protected] >>> Unsubscribe : https://launchpad.net/~acertimeline >>> More help : https://help.launchpad.net/ListHelp >>> >> > > > _______________________________________________ > Mailing list: https://launchpad.net/~acertimeline > Post to : [email protected] > Unsubscribe : https://launchpad.net/~acertimeline > More help : https://help.launchpad.net/ListHelp > > > _______________________________________________ > Mailing list: https://launchpad.net/~acertimeline > Post to : [email protected] > Unsubscribe : https://launchpad.net/~acertimeline > More help : https://help.launchpad.net/ListHelp > > _______________________________________________ Mailing list: https://launchpad.net/~acertimeline Post to : [email protected] Unsubscribe : https://launchpad.net/~acertimeline More help : https://help.launchpad.net/ListHelp
