[Bug 87649] 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

--- Comment #9 from gofabian at posteo.de ---
I tried a delayed switch while the window manager is active:

echo DDIS > /sys/kernel/debug/vgaswitcheroo/switch

result:
[  143.760681] vga_switcheroo: client 1 refused switch
[  143.760687] vga_switcheroo: setting delayed switch to client 1

Afterwards I restart the window manager (logout, login)

result:
[  165.888245] vga_switcheroo: processing delayed switch to 1
[  165.888254] vga_switcheroo: client 1 refused switch
[  165.912704] vga_switcheroo: processing delayed switch to 1
[  165.912708] vga_switcheroo: client 101 refused switch
[  166.955699] vga_switcheroo: processing delayed switch to 1
[  166.955706] vga_switcheroo: client 0 refused switch
[  166.955728] vga_switcheroo: processing delayed switch to 1
[  166.955730] vga_switcheroo: client 0 refused switch
[  166.956444] vga_switcheroo: processing delayed switch to 1
[  166.956449] vga_switcheroo: client 0 refused switch

Are there any further steps I should do besides restarting the window manager?
I thought restarting the wm is sufficient.

Do you think the PRIME feature may keep the device nodes open?

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