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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Flicker/tearing on MacBook Pro 11.5 Ubuntu 18.04"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107053">107053</a>
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<th>Summary</th>
<td>Flicker/tearing on MacBook Pro 11.5 Ubuntu 18.04
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Radeon
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>cen.is.imba@gmail.com
</td>
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<pre>Created <span class=""><a href="attachment.cgi?id=140366" name="attach_140366" title="xorg log">attachment 140366</a> <a href="attachment.cgi?id=140366&action=edit" title="xorg log">[details]</a></span>
xorg log
Symptom: flicker or tearing (not sure what to call it) at the bottom of the
screen as seen in this videos:
Fedora 28 (old install): <a href="https://www.youtube.com/watch?v=q9tHH2LdYOc">https://www.youtube.com/watch?v=q9tHH2LdYOc</a>
Ubuntu 18.04 (currently installed, with glxgears info in description):
<a href="https://youtu.be/CsFHt74HY3A">https://youtu.be/CsFHt74HY3A</a>
Tested on: Debian Jessie KDE, Kubuntu 18.04, Fedora 28, Elementary OS Loki,
Ubuntu 18.04, all exact same symptom.
Hardware: Macbook Pro 11.5
lshw:
*-display
description: VGA compatible controller
product: Venus XT [Radeon HD 8870M / R9 M270X/M370X]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 83
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:51 memory:80000000-8fffffff memory:b0c00000-b0c3ffff
ioport:3000(size=256) memory:b0c40000-b0c5ffff
Added TearFree, DRI3 and glamor to try to remedy the symptom, nothing changed:
cat /usr/share/X11/xorg.conf.d/20-radeon.conf
Section "Device"
Identifier "Radeon"
Driver "radeon"
Option "TearFree" "on"
Option "DRI" "3"
Option "AccelMethod" "glamor"
EndSection
Xorg log attached. Some device busy errors seen at the bottom, not sure if it
has any relation.
Nothing really interesting in dmesg.
Symptop appears even at single monitor, however, my current setup is triple
external plus native hidpi:
xrandr --fbmm 11520x4200 --output eDP --pos 4320x2400 --mode 2880x1800 --scale
1x1 --primary --output DisplayPort-1 --pos 0x0 --mode 1920x1200 --scale 2x2
--output DisplayPort-0 --pos 3840x0 --mode 1920x1200 --scale 2x2 --output
HDMI-0 --pos 7680x0 --mode 1920x1200 --scale 2x2</pre>
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