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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW]: linux 4.6.2: mode switch is not reliable, gnome-shell sometimes hangs on mode switch"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96469">96469</a>
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<th>Summary</th>
<td>[BDW]: linux 4.6.2: mode switch is not reliable, gnome-shell sometimes hangs on mode switch
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>anarsoul@gmail.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<div>
<pre>After upgrade to linux-4.6.2 modeswitch using xrandr is very unreliable.
Gnome-shell can hang right after using xrandr. Nothing suspicious in journal,
it hangs after:
Jun 09 17:19:32 vasilykh-thinkpad-x1 /usr/lib/gdm/gdm-x-session[563]: (II)
intel(0): resizing framebuffer to 4480x1440
Jun 09 17:19:32 vasilykh-thinkpad-x1 /usr/lib/gdm/gdm-x-session[563]: (II)
intel(0): switch to mode <a href="mailto:2560x1440@60.0">2560x1440@60.0</a> on DP2-2 using pipe 0, position (1920,
0), rotation normal, reflection none
Jun 09 17:19:32 vasilykh-thinkpad-x1 kernel: [drm] Reducing the compressed
framebuffer size. This may lead to less power savings than a non-reduced-size.
Try to increase stolen memory size if available in BIOS
Hardware is Thinkpad X1 Carbon 3rd gen, Broadwell graphics. External monitor is
connected using OneLink dock.</pre>
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