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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - BUG: soft lockup - CPU#0 stuck for 22s! [Xorg:1292] after disable descrete card with switcheroo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70895#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - BUG: soft lockup - CPU#0 stuck for 22s! [Xorg:1292] after disable descrete card with switcheroo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70895">bug 70895</a>
from <span class="vcard"><a class="email" href="mailto:mszpak@wp.pl" title="Marcin Zajaczkowski <mszpak@wp.pl>"> <span class="fn">Marcin Zajaczkowski</span></a>
</span></b>
<pre>Hello again. I upgraded my system to Fedora 21 and with 3.17.3-300.fc21.x86_64
I cannot reproduce mentioned issue (with "CPU#0 stuck for 22s").
Unfortunately I have problem with switching a discrete card. By default:
# echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
does nothing - a discrete card is still in DynPwr state:
$ $ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynPwr:0000:01:00.0
Booting with nouveau.runpm=0 I have both cards on:
$ $ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Pwr:0000:01:00.0
and after
# echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
I have:
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Off:0000:01:00.0
Looks ok, but I still see 3 providers:
$ xrandr --listproviders
Providers: number : 3
Provider 0: id: 0x90 cap: 0xb, Source Output, Sink Output, Sink Offload crtcs:
3 outputs: 5 associated providers: 2 name:Intel
Provider 1: id: 0x63 cap: 0x7, Source Output, Sink Output, Source Offload
crtcs: 2 outputs: 2 associated providers: 2 name:nouveau
Provider 2: id: 0x63 cap: 0x7, Source Output, Sink Output, Source Offload
crtcs: 2 outputs: 2 associated providers: 2 name:nouveau
and system temperature could suggest that the card is still on. I see no
messages from VGA switcheroo in the system log (as there were in 3.11.6).
When I use (on the second kernel) bbswitch with bumblebee I see only one
provider and the temperature is a few (~6) degrees lower.
Should I close that issue and report another issue?</pre>
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