https://bugzilla.kernel.org/show_bug.cgi?id=37362
Summary: vgaswitcheroo : switch from intel to ati impossible Product: Drivers Version: 2.5 Kernel Version: 2.6.38 and 2.6.39 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: pub@ackak.fr Regression: No
Created an attachment (id=61732) --> (https://bugzilla.kernel.org/attachment.cgi?id=61732) lspci -vv
When i use the command "echo DIS > /sys/kernel/debug/vgaswitcheroo/switch", the screen of my laptop (HP Pavilion dv7) freeze. Impossible to switch to another tty and if i write a command in the console nothing appears.
If i write "echo IGD > /sys/kernel/debug/vgaswitcheroo/swith", the screen refreshes and i can use normally my laptop.
I can't disable the intel card in the bios.
the result of the command "cat /sys/kernel/debug/vgaswitcheroo/swith" : 0:DIS: :Pwr:0000:01:00.0 1:IGD:+:Pwr:0000:00:02.0
The log (/var/log/messages) when i want switch to ATI : Jun 12 22:11:17 ackak-hp kernel: [ 133.005729] fbcon: Remapping primary device, fb0, to tty 1-63 Jun 12 22:11:17 ackak-hp kernel: [ 133.005976] i915: switched off