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Thread: [vgaswitcheroo] Problem with card Intel/ATI

  1. #1
    Join Date
    Jun 2011
    Posts
    3

    Default [vgaswitcheroo] Problem with card Intel/ATI

    Hi,

    (Sorry for my english.)

    I have buy a laptop (HP Pavilion dv7-6090ef) with 2 graphics cards

    The result of the command "cat /sys/kernel/debug/vgaswitcheroo/switch" is
    Code:
    0:DIS: :Pwr:0000:01:00.0
    1:IGD:+:Pwr:0000:00:02.0
    If i use the command "echo OFF > /sys/kernel/debug/vgaswitcheroo/switch", the result is :
    Code:
    0:DIS: :Off:0000:01:00.0
    1:IGD:+:Pwr:0000:00:02.0
    If i use the command "echo DIS > /sys/kernel/debug/vgaswitcheroo/switch", the laptop freeze. The /var/log/messages :
    Code:
    kernel: [   51.431992] fbcon: Remapping primary device, fb0, to tty 1-63
    kernel: [   51.432259] i915: switched off
    kernel: [   65.405216] SysRq : Emergency Sync

    The kernel : 2.6.38-gentoo-r6 and 2.6.39-gentoo.

    I don't understand why the laptop frozen.

    Thanks.

  2. #2
    Join Date
    Jun 2011
    Posts
    3

    Default

    no trail to solve the problem ?

  3. #3
    Join Date
    Jun 2011
    Posts
    1

    Default Well, there's your problem

    Quote Originally Posted by Ackak View Post
    If i use the command "echo DIS > /sys/kernel/debug/vgaswitcheroo/switch", the laptop freeze. The /var/log/messages :
    Code:
    kernel: [   51.431992] fbcon: Remapping primary device, fb0, to tty 1-63
    kernel: [   51.432259] i915: switched off
    kernel: [   65.405216] SysRq : Emergency Sync
    Well, there's your problem. DIS tells the kernel to immediately switch the card in use, so the display is still pointing at the other one. Instead of DIS, use DDIS (Delayed DIScrete), which will wait until the X server is restarted to switch the card in use. At present, it is impossible to seamlessly switch between the cards in linux. To restart the X server, either simply logout (if you're using gdm), restart your display manager, or hit Ctrl + Alt + Delete (if that shortcut is enabled)

  4. #4
    Join Date
    Jun 2011
    Posts
    3

    Default

    Thanks for your response.

    I have make the test with DDIS and i have the same bugs.

    I have post in the kernel bugzilla and i must wait development of Xorg
    http://bugzilla.kernel.org/show_bug.cgi?id=37362

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