Public bug reported:
I am working with a new HP PC (dv7) which supports Hybrid Graphics in
terms of the intel graphics and radeon graphics (as can bee found in
lspci).
Currently I am only working with the Intel integrated graphics, and both
adapters are powered on.
My goal was to deactivate the intel graphics and activate the radeon
graphics, as the machine is plugged in to the power supply most of the
time. To achieve this I tried the following:
cat /sys/kernel/debug/vga_switcheroo/switch
--> shows both cards are powered on and IGD is in use (the intel card)
echo DIS > /sys/kernel/debug/vga_switcheroo/switch
--> gives an error message because X is still running
I kill the X session
echo DIS > /sys/kernel/debug/vga_switcheroo/switch
After this command the system freezes completely. No warning or error, no
blinking cursor, nothing. I have to power off using the power button.
Any suggestions on how to fix this are welcome. Is this a bug in the
kernel?
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-12-generic 3.0.0-12.20
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: wim 1617 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xc7500000 irq 51'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:111d7605,103c1659,00100105
HDA:80862805,80860101,00100000'
Controls : 18
Simple ctrls : 10
Date: Mon Oct 24 23:55:59 2011
HibernationDevice: RESUME=/dev/sda3
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Hewlett-Packard HP Pavilion dv7 Notebook PC
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic
root=UUID=71fb680e-ac18-42aa-86fb-4618d70b3895 ro quiet splash modeset=1
hybridopts=ON,DIS,OFF vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.0.0-12-generic N/A
linux-backports-modules-3.0.0-12-generic N/A
linux-firmware 1.60
SourcePackage: linux
StagingDrivers: rts_pstor mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/20/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.1A
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1659
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 10.31
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnHewlett-Packard:bvrF.1A:bd07/20/2011:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvr058F110000244610000620100:rvnHewlett-Packard:rn1659:rvr10.31:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dv7 Notebook PC
dmi.product.version: 058F110000244610000620100
dmi.sys.vendor: Hewlett-Packard
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug oneiric running-unity staging
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https://bugs.launchpad.net/bugs/881132
Title:
vga_switcheroo makes system freeze
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