Re: Fedora 16 black screen with Radeon HD 6470M: partially solved?
On Thu, Dec 08, 2011 20:18:21 PM +0100, Marco Fioretti wrote:
I've got a HP G6 1273SL laptop with this chipset and a live cd
of
Fedora 16 x86_64, KDE spin... when I [boot] the screen goes
completely black.
if I... add to its initrd line the two parameters
acpi_osi=Linux acpi_backlight=vendor
Fedora boots without problems, but the laptop is quite warm.
If I check the graphich chips status, I get:
#> cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Pwr: etc etc...
so, if I understand correctly, I MUST also disable the discrete
graphic chip with a script like this:
#####################################################
#! /bin/bash
modprobe radeon
echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
#####################################################
and then add to /etc/rc/rc.local
Is this