[Bug 87649] New: After archlinux system update switching on both of internal and external graphics card does not work anymore (vgaswitcheroo)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87649

            Bug ID: 87649
           Summary: After archlinux system update switching on both of
                    internal and external graphics card does not work
                    anymore (vgaswitcheroo)
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: fabian.ifflaender at posteo.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111236
  --> https://bugs.freedesktop.org/attachment.cgi?id=111236&action=edit
dmesg output with error logging

Hello,

after I updated archlinux with 'pacman -Syu' I cannot switch on both graphics
cards (amd+intel) concurrently anymore via vgaswitcheroo. I need the parallel
activation because Intel feeds the notebook screen and amd feeds my external
screen. 

Default graphics card is the Intel one. This configuration is working well
(only notebook screen). I have another grub boot option that switches on the
dedicated graphics card before the display manager is started:

echo ON > /sys/kernel/debug/vgaswitcheroo/switch
echo DIS > /sys/kernel/debug/vgaswitcheroo/switch

When I add a further 'echo OFF > ...' command, the Intel graphics card will not
be active and the error will not happen. But in this case I do not have an
output on my notebook screen.

I had a look at the dmesg output and it told me to create a bug ticket ;-)

Error: [drm] GPU HANG: ecode 0:0x85ffaafc, in Xorg.bin [1080], reason: Ring
hung, action: reset

Notebook: HP Envy 14-1101eg

Best regards
Fabian

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