I experienced a similar issue very frequently with silo 13 (unity8, new
OOBE) but never without. So maybe the issue already exists in the image
but silo 13 makes it worse.
** Also affects: canonical-devices-system-image
Importance: Undecided
Status: New
** Changed in: canonical-devices-system-image
Status: New => Confirmed
** Changed in: canonical-devices-system-image
Importance: Undecided => Critical
** Changed in: canonical-devices-system-image
Assignee: (unassigned) => kevin gunn (kgunn72)
** Changed in: canonical-devices-system-image
Milestone: None => ww08-2016
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https://bugs.launchpad.net/bugs/1560188
Title:
unity8 hang w/ CPU pegged (needs more detail)
Status in Canonical System Image:
Confirmed
Status in unity8 package in Ubuntu:
New
Bug description:
Sometime in the past week or so, it seems that unity8 acquired a new
bug which causes it to use 100% CPU and stop responding. I saw it
happen on krillin rc-proposed 286 and 288 with silo 39 (address-book-
app) installed. Jibel saw it with a different silo, and mterry
reports seeing it with yet another different silo.
Details are being collected still, but this bug serves as a place to
put the data together.
For me, the steps involved to trigger it were:
1. Flash rc-proposed to a krillin.
2. Install silo 39, address-book-app, and reboot. (probably not relevant)
3. Log in, configure time zone, disable automatic updates, configure login to
use a passcode instead of passphrase, set screen to never turn itself off.
4. Go back to the app scope and launch address-book-app.
5. Tilt the phone to make the screen rotate.
At this point, the UI stopped responding and 'top' showed 100% CPU
being used by unity8.
I tried to get data from gdb, but it wasn't very helpful:
(gdb) bt
#0 0xa803cce2 in ?? ()
#1 0xa803cb98 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
More details are needed.
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