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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [NVAA] nouveau: tearing regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75620">75620</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[NVAA] nouveau: tearing regression
</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>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alexanders83@web.de
</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>
</tr>
<tr>
<th>Component</th>
<td>Driver/nouveau
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=94915" name="attach_94915" title="git bisect log">attachment 94915</a> <a href="attachment.cgi?id=94915&action=edit" title="git bisect log">[details]</a></span>
git bisect log
I noticed mplayer showing some tearing starting from kernel version v3.10.7
which wasn't there in v3.8.
I could bisect it down to commit 1d7c71a3e2f77336df536855b0efd2dc5bdeb41b
(drm/nouveau/disp: port vblank handling to event interface).
Unfortunately c7d73f6a8ad71f9d9f58c86981322c6e48093a4f introduced a
NULL-pointer dereference regression. Luckily I found
526810adb93554e17bdb83023a01cfa8758960b2 which fixes that. Doing the bisect I
had to cherry-pick that each time until I tried commit 1d7c71a. At this commit
I additionally need to cherry-pick c8f28f8.
After adding those 2 commits I could run mplayer again and could clearly see
the tearing effect.
My hardware:
02:00.0 VGA compatible controller: NVIDIA Corporation C77 [GeForce 8300] (rev
a2) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Device 82f2
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 20
Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
Region 1: Memory at f0000000 (64-bit, prefetchable) [size=128M]
Region 3: Memory at fa000000 (64-bit, prefetchable) [size=32M]
Region 5: I/O ports at ec00 [size=128]
Expansion ROM at feae0000 [disabled] [size=128K]
Capabilities: [60] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Kernel driver in use: nouveau
Kernel modules: nouveau</pre>
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