** Changed in: mir
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1270245
Title:
Backward frame jumps on mali (Nexus 10 &
This bug was fixed in the package mir - 0.18.0+16.04.20151216.1-0ubuntu1
---
mir (0.18.0+16.04.20151216.1-0ubuntu1) xenial; urgency=medium
[ Kevin DuBois ]
* New upstream release 0.18.0 (https://launchpad.net/mir/+milestone/0.18.0)
- ABI summary: Only servers need rebuilding;
** Changed in: mir
Status: In Progress => Fix Committed
** Tags removed: performance
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Title:
Backward frame
retargeted for release in 0.18 (landed while waiting for other blocking
bugs)
** Changed in: mir
Milestone: 0.19.0 => 0.18.0
** Branch linked: lp:~kdub/mir/fix-1270245
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** Changed in: mir
Milestone: 0.18.0 => 0.19.0
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Title:
Backward frame jumps on mali (Nexus 10 & krillin)
Status in
I think the root cause here is that the mali based hwc implementations
are not clearing the fences set in the FRAMEBUFFER_TARGET layer after a
gl swap. Will come up with a quirk to compensate.
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Started investigation into this bug again as part of investigation into
https://bugs.launchpad.net/mir/+bug/1517205
** Changed in: mir
Assignee: (unassigned) => Kevin DuBois (kdub)
** Changed in: mir
Milestone: None => 0.18.0
** Changed in: mir
Status: Confirmed => In Progress
** Changed in: mir
Milestone: 0.15.0 = 0.16.0
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in
If all we're doing is moving the milestone on this, we may as well un-
target it. Less noise.
** Changed in: mir
Milestone: 0.16.0 = None
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** Changed in: mir
Milestone: 0.14.0 = 0.15.0
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in
** Tags added: android
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in Mir:
Confirmed
Status in
** Changed in: mir
Milestone: 0.13.0 = 0.14.0
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in
** Changed in: mir
Milestone: 0.11.0 = 0.12.0
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in
** Changed in: mir
Milestone: 0.10.0 = 0.11.0
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in
** Changed in: mir
Milestone: 0.9.0 = 0.10.0
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Title:
Backward frame jumps on mali (Nexus 10 krillin)
Status in
Not much info in the kernel log but here it is.
** Attachment added: kernel.log
https://bugs.launchpad.net/mir/+bug/1270245/+attachment/4253871/+files/kernel.log
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Logcat log for krillin
** Attachment added: logcat.log
https://bugs.launchpad.net/mir/+bug/1270245/+attachment/4253872/+files/logcat.log
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In krillin you can still see frame jumps or out of order frames with:
sudo stop lightdm
sudo mir_demo_server_basic --disable-overlays=true --launch-client
mir_demo_client_egltriangle
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See backwards frame jumps at 0:04 and 0:24 marks in the attached video.
** Attachment added: IMG_1038.MOV
https://bugs.launchpad.net/mir/+bug/1270245/+attachment/4246372/+files/IMG_1038.MOV
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I've was also able to reproduce the frame jump issue today, so my
theories in comment #32 don't have a bearing on the bug.
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Confirmed bug still present on krillin with the latest image and latest
Mir code.
** Changed in: mir
Status: Incomplete = Triaged
** Changed in: mir
Status: Triaged = Confirmed
** Changed in: mir (Ubuntu)
Status: Incomplete = Confirmed
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Another thing to note about this bug is that it would only happen when
we were using OpenGLES to render to the framebuffer. If we eliminated
EGL and OpenGLES by using HWC overlay composition, the bug was also not
seen, so this further supports the theory that the EGL/OpenGLES driver
is where the
I haven't been able to reproduce this today. My working theory as to why is its
either
1) Maybe a new driver version has the skipping issue fixed
2) The threading changes to MultiThreadedCompositor in lp:mir rev1897 to fix
lp: #1362841 has hidden the problem and its still latent.
I guess the
See attached another (dangerous) hack that appears to solve the problem
on krillin at least. Although it's plausibly not really a fix, but just
slowing us down to the point of working around the problem.
** Patch added: no_mali_glitch.diff
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