https://bugzilla.kernel.org/show_bug.cgi?id=60606
Bug ID: 60606
Summary: vga_switcheroo / new Radeon DPM code mess up fbcon
Product: Drivers
Version: 2.5
Kernel Version: 3.11.0-rc2
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-dri at kernel-bugs.osdl.org
Reporter: sebastien.fievet at free.fr
Regression: No
Created attachment 106987
--> https://bugzilla.kernel.org/attachment.cgi?id=106987&action=edit
radeon switch OFF / switch ON experiment
I am the happy owner of an hybrid Intel core i5 480M / AMD Radeon 6550M latop.
- IGP is Intel ironlake
- DGD is AMD radeon 6550M
I just installed kernel 3.11.0-rc2.
switching the discrete GPU OFF via the vgaswticheroo works from within X or
from the console :
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Pwr:0000:02:00.0
2:DIS-Audio: :Pwr:0000:02:00.1
I then tried to switch the radeon back ON from the console with X down :
echo ON > /sys/kernel/debug/vgaswitcheroo/switch
It messed up the console display : screen turned to dominant grey scattered
with coloured pixels making it unreadable, forcing me to reboot.
The attachment is the excerpt of my kern.log file for my radeon switch OFF /
switch ON experiment.
switch off is at [ 76.634983]
switch on is at [ 2167.936488] or [ 2167.936517]
I also noticed :
[ 5.457569] ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch -
Found [Integer], ACPI requires [Package] (20130517/nsarguments-95)
[ 5.457739] ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch -
Found [Integer], ACPI requires [Package] (20130517/nsarguments-95)
which seems to be related to vgaswitcheroo setup, but I don't know if it's
relevant or not.
Let me know if you need anything else.
thanks for your help,
Seb.
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