Mir

Killing Mir with Ctrl+C often leaves the screen blank and difficult to recover

Bug #1170643 reported by Daniel van Vugt
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Mir
Fix Released
Medium
Alexandros Frantzis

Bug Description

Killing Mir with Ctrl+C often leaves the screen blank and difficult to recover.

When this happens, the only way to get the screen back is to switch to X (Ctrl+Alt+F7) and back again (Ctrl+Alt+F1).

Tags: vt

Related branches

lp:~afrantzis/mir/fix-resources-release-on-shutdown-lp-1170643
Robert Carr (community): Approve
Alan Griffiths: Approve
PS Jenkins bot (community): Approve (continuous-integration)
Diff: 364 lines (+224/-38)
3 files modified
src/server/shell/session_manager.cpp (+16/-0)
tests/acceptance-tests/test_server_shutdown.cpp (+194/-38)
tests/integration-tests/shell/test_session_manager.cpp (+14/-0)
Revision history for this message
Alexandros Frantzis (afrantzis) wrote :

I haven't seen this for some time, since https://bugs.launchpad.net/mir/+bug/1161514 was fixed.

Some questions: Does this happen when running, e.g., render_surfaces, too? Does this happen when starting mir without any clients?

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Confirmed still happening with the latest trunk r613.

Only seems to happen when the server has no clients. But I can't tell for sure. It's very unpredictable and will shut down cleanly restoring the VT at least half the time.

I'm most concerned that we need X as a workaround for this. Switching to X seems to reset something that Mir and the VTs do not, turning the screen back on. It's bad to have even a weak dependency on X like this :)

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

On closer inspection, the problem is my laptop's backlight turning off when I kill the mir server (!)

Only switching to X turns it back on.

Alexandros Frantzis (afrantzis)
Changed in mir:
status: New → Confirmed
Alexandros Frantzis (afrantzis)
Changed in mir:
status: Confirmed → In Progress
assignee: nobody → Alexandros Frantzis (afrantzis)
Revision history for this message
PS Jenkins bot (ps-jenkins) wrote :

Fix committed into lp:mir at revision None, scheduled for release in mir, milestone 0.0.3

Changed in mir:
status: In Progress → Fix Committed
Robert Ancell (robert-ancell)
Changed in mir:
status: Fix Committed → Fix Released
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