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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - After archlinux system update switching on both of internal and external graphics card does not work anymore (vgaswitcheroo)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87649#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - After archlinux system update switching on both of internal and external graphics card does not work anymore (vgaswitcheroo)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87649">bug 87649</a>
from <span class="vcard"><a class="email" href="mailto:gofabian@posteo.de" title="gofabian@posteo.de">gofabian@posteo.de</a>
</span></b>
<pre>(In reply to Imre Deak from <a href="show_bug.cgi?id=87649#c8">comment #8</a>)
<span class="quote">> Based on the "vga_switcheroo: client x refused switch" message I assume some
> user space app keep the relevant device nodes open and switching isn't
> possible at that time. Did you make sure all interesting apps are stopped
> (desktop, pulse audio etc.) before switching?</span >
You were right. The process pulseaudio still ran. I tried this:
- Stop mdm
- killall pulseaudio
- echo DDIS > /sys/kernel/debug/vgaswitcheroo/switch
- Start mdm
i915 does not refuse to switch. BUT: The screens stay black. The dmesg output
says that the radeon driver had some errors.</pre>
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