unity launcher drawing almost completely blank

Bug #1080102 reported by Craig Hansen
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
unity (Ubuntu)
New
Undecided
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Bug Description

Each time this bug has cropped up, the session has been running for quite a while. I run an interactive session via VNC, as as such the auto-hide for the launcher must be turned off. At some point, the left-side launcher rectangle gets repeatedly drawn while interacting with applications (the mouse is not positioned within the launcher rectangle as this happens), and soon after, the left-side launcher rectangle appears almost completely blank (only highlighted background drawn there), with just the barest hint of what appears to be launcher icon partially visible at the top.

Running "unity --reset" does not restore the launcher. Attempting to log-out and log-in again doesn't work because auto-log-in doesn't auto-log-in after a log-out. In this state the launcher cannot be operated to start additional applications or restore visibility of minimized windows. The only recovery I've been able to perform is a system reboot.

This bug is made worse by three other longstanding problems:
    1) Auto-hide of the launcher is broken under VNC, and
    2) auto-log-in doesn't operate after a log-out, and
    3) vino-server doesn't start until log-in/auto-log-in.
I'll try to submit these as additional bugs

A screen-shot exhibiting the sorry state of the display when the bug occurs is attached.

Revision history for this message
Craig Hansen (craig-hansen) wrote :
Revision history for this message
Craig Hansen (craig-hansen) wrote :

I have observed this bug to happen around the 25th day of uptime, so I believe it to be the same bug as Bug #806248,
unity::TimeUtil::TimeDelta returns an int value which overflows after 24 days of uptime.

I have found a workaround less horrible than a reboot: the shell command: "sudo service lightdm restart" which allows the auto-login to operate again, so a remote vnc access can be re-established.

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