Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: mir (Ubuntu)
Status: New = Confirmed
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Title:
Heavy
Confirmed on Ivy Bridge. I can see the bug now :)
** Changed in: mir
Status: New = Confirmed
** Changed in: mir
Milestone: None = 0.12.0
** Summary changed:
- Heavy black flickering after VT switching on Intel Ironlake Mobile.
+ Heavy black flickering after VT switching on Intel
Sorry, video is a bit big.
- switched to VT 1
- started mir_demo_server (no flickering yet)
- switched to VT 7
- switched to VT 1 (flickering is apparent, as seen by cursor)
- switched to VT 7
- started gedit under the mir backend
- switched to VT 1 (flickering is apparent, as seen by cursor and
Oops, sorry, that should be a .ogv extension...
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Title:
Heavy black flickering after VT switching on Intel Ironlake Mobile.
To manage
Certainly Mir's page flipping logic changed a bit in Mir 0.10 (faster).
However, this bug doesn't occur on any other GPU (even tried several
intel GPUs), and if the cursor is flickering then it's likely a kernel
bug.
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Bugs,
Still occurs with 3.19.0-031900rc6-generic :(
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Title:
Heavy black flickering after VT switching on Intel Ironlake Mobile.
To manage
William,
Can you post a video of the flickering? That's often helpful for us to identify
the kind of problem it might be.
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Title:
Heavy black
William Hua, the next step is to fully commit bisect from kernel 3.16.7
to 3.18 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following
** Tags added: bios-outdated-1.40
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Title:
Heavy black flickering after VT switching on Intel Ironlake Mobile.
To manage notifications about
William Hua, could you please test 3.19-rc6 and advise to the results?
** Tags removed: black demo flicker kernel kernel-bug-exists-upstream mir server
** Tags added: kernel-bug-exists-upstream-3.19-rc4 needs-upstream-testing
** Changed in: linux (Ubuntu)
Status: Confirmed = Incomplete
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Title:
Heavy black flickering after VT switching on Intel Ironlake Mobile.
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.19 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
Does this bug also go away with the test kernel in comment #28 of bug
1408593
** Tags added: kernel-da-key
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Title:
Heavy black flickering after
apport information
** Tags added: apport-collected vivid
** Description changed:
- After running mir_demo_server on VT 1, when I switch to VT 7 then back
- to VT 1, the demo server really flickers black quite a lot (entire
- screen, pointer included). I'm not sure, but I also upgraded my kernel
Thanks Joseph,
The bug still exists with 3.19.0-031900rc4-generic.
The bug does not exist with 3.19.0-994-generic. However the pointer is very
laggy.
I think I can only revert to 3.16.7-031607.201410301735 in the mean
time...
** Tags added: kernel-bug-exists-upstream
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Sorry, I wasn't specific enough. I meant I used the
3.19.0-994.201501130205 kernel from comment #28 of LP: #1408593. The bug
doesn't exist there, however I have a very laggy pointer from that one
which seems to be a new regression.
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The 3.19.0-994-generic is the daily build. That may indicate that this
will be fixed in 3.19-rc5. Were you also able to test the test kernel
in comment #28 of bug 1408593 ?
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Re: Comment #35
By laggy pointer you mean laggy in X? That would indicate it's falling back to
software rendering and a software cursor.
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Title:
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Title:
Heavy black flickering after VT switching on Intel Ironlake
Daniel, thanks, you're completely right. I downgraded my kernel to
3.16.7-031607-generic and the flickering problem went away. Definitely
wondering if it has something to do with bug LP: #1408593 which also
affected me when I upgraded to 3.18.
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Actually, no...
William: Can you please re-run apport-collect 1409133 when the /broken/
kernel version is running?
The command should work now this bug has a kernel task.
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See comment #1 onward.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
** Changed in: linux (Ubuntu)
Status: Confirmed = New
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You say the hardware pointer is flickering too? That's rendered entirely
by the kernel so this sounds like a kernel driver bug.
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Title:
Heavy
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