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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#c5">Comment # 5</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:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> <span class="fn">Imre Deak</span></a>
</span></b>
<pre>In the dmesg I can also see
[ 8.223153] i915: switched off
Looking at the 3.17.6 kernel it seems we won't re-enable the PCI device
afterwards in response to a switcheroo ON command. Could you try v3.19-rc2 or
git://anongit.freedesktop.org/drm-intel ? There is a related i915 switcheroo
fix in those that should address this issue.</pre>
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