Public bug reported:
The GUI of update-manager to select updates to install keeps hanging for
indefinite time with 100% CPU load (full single CPU core).
This is happening to me already since the 12.04 LTS times, and the
behavior is more or less unchanged in 14.04 LTS.
Steps to reproduce:
0. There should be some updates available for update-manager to show the
window with the update to be installed.
1. Click the "Details of updates" to display the list
2. Expand (for example) "*Ubuntu base" and click on some package in the list.
3. Click the "Technical description" to show the description.
4. Click again the "Technical description" to hide the description.
5. Click on some other package in the list.
Expected:
- The update manager reacts to the click and moves focus in the list to another
package
Actual result:
- The update manager hangs (doesn't react to mouse/keyboard events) for
indefinite time with 100% CPU load. Time of the blocking varies: from few
seconds to up to a minute probably.
Just some general toggling of "Details of updates" and "Technical
details", and clicking on different items in the list would cause the
weird behavior to occur. (Eventually it would also cause the "Details of
updates" to either stop showing the details or showing the details while
making the update-manager window non-resizeable.)
** Affects: update-manager (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "gdb's thread apply all where output from the time period
when the update-manager was hangning"
https://bugs.launchpad.net/bugs/1472947/+attachment/4426814/+files/update-manager-temp-hang.txt
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https://bugs.launchpad.net/bugs/1472947
Title:
update-manager hangs after click on techical description
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