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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
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<tr>
<th>Bug ID</th>
<td><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">70895</a>
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>BUG: soft lockup - CPU#0 stuck for 22s! [Xorg:1292] after disable descrete card with switcheroo
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>mszpak@wp.pl
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
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<tr>
<th>Component</th>
<td>Driver/nouveau
</td>
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<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=88154" name="attach_88154" title="kernel log with stack trace">attachment 88154</a> <a href="attachment.cgi?id=88154&action=edit" title="kernel log with stack trace">[details]</a></span>
kernel log with stack trace
After disable discrete graphics with:
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
nouveau drivers seems to react:
kernel: [ 113.072192] VGA switcheroo: switched nouveau off
Oct 26 16:07:52 localhost kernel: [ 113.072208] ACPI Warning:
\_SB_.PCI0.PEGR.GFX0._DSM: Argument #4 type mismatch - Found [Buffer], ACPI
requires [Package] (20130517/nsarguments-95)
kernel: [ 113.072350] nouveau [ DRM] suspending fbcon...
kernel: [ 113.072354] nouveau [ DRM] suspending display...
kernel: [ 113.072360] nouveau [ DRM] unpinning framebuffer(s)...
kernel: [ 113.072400] nouveau [ DRM] evicting buffers...
kernel: [ 113.085655] nouveau [ DRM] waiting for kernel channels to go
idle...
kernel: [ 113.085682] nouveau [ DRM] suspending client object trees...
kernel: [ 113.085976] nouveau [ DRM] suspending kernel object tree...
kernel: [ 113.865315] nouveau 0000:01:00.0: power state changed by ACPI to
D3cold
but xrandr --listproviders hangs the whole system with:
kernel: [ 324.008068] BUG: soft lockup - CPU#0 stuck for 22s! [Xorg:1292]
Detailed log with stack trace attached.
System specification:
Asus N43SN
GeForce GT 550M + integrated Intel card using i915 driver (NVidia Optimus)
kernel-3.11.6-200.fc19.x86_64
xorg-x11-drv-nouveau-1.0.9-1.fc19.x86_64
xorg-x11-server-Xorg-1.14.3-1.fc19.x86_64
$ xrandr --listproviders
Providers: number : 3
Provider 0: id: 0x8e cap: 0xb, Source Output, Sink Output, Sink Offload crtcs:
2 outputs: 4 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</pre>
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