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<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 --- - Performance regression on Gen4 Intel GM45 GMA4500MHD"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77372">77372</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>Performance regression on Gen4 Intel GM45 GMA4500MHD
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rimbotede@hotmail.com
</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>Created <span class=""><a href="attachment.cgi?id=97263" name="attach_97263" title="system info lspci glxinfo">attachment 97263</a> <a href="attachment.cgi?id=97263&action=edit" title="system info lspci glxinfo">[details]</a></span>
system info lspci glxinfo
System info:
Gnome shell 3.10
Thinkpad T500 with dual graphics (BIOS: integrated mode, OS dual-graphics
detection disable)
single built-in notebook display, 1680x1050 native
no other displays connected, ever
My system suffers from a serious performance regression since Fedora 18 ~
February 2013. Neither version of xorg, intel driver or gnome shell released
since then restored the previous buttery-smooth performance.
Steps to reproduce:
1. Boot into Gnome Shell
2. Open 3-4 Nautilus windows
3. Enter/exit the Activities (overview) few times. (other animations are not
smooth but in Activities it's easiest to observe).
Expected result:
Smooth animations.
Actual result:
Clunky animations. Below 15 FPS. Tends to get worse after few Activities
in/out. Further worsens after launching any web browser and loading a website.
When it worsens it never gets better, even after leaving just two Nautilus
windows open.
What I have already tried:
1. Lowering resolution to 800x600. The performance drop is much less severe.
2. Disabling gpu powersaving
<a href="https://bugzilla.redhat.com/show_bug.cgi?id=977391#c12">https://bugzilla.redhat.com/show_bug.cgi?id=977391#c12</a> / No change.
3. CLUTTER_PAINT=disable-clipped-redraws:disable-culling / Doesn't restore the
previous performance; Makes all animations significantly smoother.
4. MUTTER_DISABLE_MIPMAPS=1 gnome-shell --replace / No change.
5. UXA/SNA/Glamor acceleration methods / No change.
6. Virtually all possible parameter combinations in
/etc/X11/xorg.conf.d/20-intel.conf
# pacman -Q | egrep '^mesa|intel|clutter '
clutter 1.16.4-3
intel-dri-git 62265.a22d944-1
lib32-intel-dri 10.1.0-4
mesa-git 62265.a22d944-1
mesa-libgl-git 62265.a22d944-1
xf86-video-intel-dri3-git 7820.6caf295-1
Recently tested on Arch.</pre>
</div>
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