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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SNB] i915 4.11.0-rc1 circular locking dependency detected, switcheroo-cont/776 is trying to acquire lock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100143#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SNB] i915 4.11.0-rc1 circular locking dependency detected, switcheroo-cont/776 is trying to acquire lock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100143">bug 100143</a>
from <span class="vcard"><a class="email" href="mailto:bugzilla@hadess.net" title="Bastien Nocera <bugzilla@hadess.net>"> <span class="fn">Bastien Nocera</span></a>
</span></b>
<pre>The locking backtrace shows the problem between the radeon driver and the
tty/fbcon ones, not the Intel driver.
Switcheroo-control disables the discrete GPU during bootup, so that only the
Intel/integrated GPU is enabled by default.
<a href="https://github.com/hadess/switcheroo-control/blob/master/src/switcheroo-control.c#L223">https://github.com/hadess/switcheroo-control/blob/master/src/switcheroo-control.c#L223</a>
would be roughly equivalent to:
echo DIGD > /sys/kernel/debug/vgaswitcheroo/switch
as root.</pre>
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