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<head>
<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - crash in the cursor code"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81645">81645</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>crash in the cursor code
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>debian@delanoe.org
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>On Debian Jessie,freeze noticed with such logs in dmesg:
[54320.265767] CPU: 0 PID: 829 Comm: Xorg Tainted: P W O 3.14-1-amd64
#1 Debian 3.14.12-1
[54320.265768] Hardware name: Apple Inc. MacBookAir6,1/Mac-35C1E88140C3E6CF,
BIOS MBA61.88Z.0099.B09.1402071141 02/07/2014
[54320.265769] 0000000000000009 ffffffff814ba733 ffff88026519dc98
ffffffff8105f032
[54320.265770] ffff880263518028 ffff88026519dce8 0000000000070084
0000000000000292
[54320.265772] 0000000000000000 ffffffff8105f097 ffffffffa0948a74
ffff880200000018
[54320.265773] Call Trace:
[54320.265775] [<ffffffff814ba733>] ? dump_stack+0x41/0x51
[54320.265777] [<ffffffff8105f032>] ? warn_slowpath_common+0x72/0x90
[54320.265778] [<ffffffff8105f097>] ? warn_slowpath_fmt+0x47/0x50
[54320.265784] [<ffffffffa091b0ab>] ? hsw_write32+0x4b/0x150 [i915]
[54320.265789] [<ffffffffa091c428>] ? gen6_read32+0x48/0x120 [i915]
[54320.265794] [<ffffffffa08d8a4d>] ? intel_crtc_update_cursor+0x29d/0x3f0
[i915]
[54320.265799] [<ffffffffa08dbb10>] ? intel_crtc_cursor_move+0x50/0x60 [i915]
[54320.265804] [<ffffffffa031605f>] ? drm_mode_cursor_common+0x8f/0x160 [drm]
[54320.265809] [<ffffffffa0319c9f>] ? drm_mode_cursor_ioctl+0x3f/0x50 [drm]
[54320.265812] [<ffffffffa030b89d>] ? drm_ioctl+0x42d/0x530 [drm]
[54320.265816] [<ffffffffa02fec30>] ? evdev_read+0xd0/0x2f0 [evdev]
[54320.265818] [<ffffffff81197e9f>] ? do_vfs_ioctl+0x2cf/0x4b0
[54320.265820] [<ffffffff81185e21>] ? vfs_read+0x91/0x160
[54320.265822] [<ffffffff811980f9>] ? SyS_ioctl+0x79/0x90
[54320.265823] [<ffffffff814c80b9>] ? system_call_fastpath+0x16/0x1b
[54320.265824] ---[ end trace 77f62fde486db570 ]---
[54320.265827] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register
before writing to 70084
[54320.265828] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70084</pre>
</div>
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