Mir

Screen goes blank (black) briefly during display config changes which don't affect the display mode

Bug #1274359 reported by Daniel van Vugt on 2014-01-30
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Mir
Fix Released
Medium
Cemil Azizoglu
mir (Ubuntu)
Medium
Unassigned

Bug Description

The screen goes blank (black) briefly during display config changes, on desktop (mesa platform). For mode changes I think this is expected, but it also happens for non-mode changes like screen rotation and probably repositioning.

TEST CASE:
   1. Run mir_demo_server_shell
   2. Start a client you can see on screen
   3. Invoke a display config change with screen rotation: Ctrl+Alt+(arrow key)

Expected: Instant rotation
Observed: Screen blanks briefly before rotating.

The blackness is very brief, but I think we can do better. By avoiding unnecessary destruction and reconstruction of mesa::DisplayBuffer's each time.

Related branches

summary: - Screen goes blank (black) briefly during display config changes
+ Screen goes blank (black) briefly during display config changes which
+ don't affect the display mode
description: updated
Daniel van Vugt (vanvugt) wrote :

This bug is gradually gaining priority. As Unity8 starts to use Mir's DisplayBufferCompositor it will need to be fixed for shell screen rotation.

Changed in mir:
importance: Low → Medium
Changed in mir:
assignee: nobody → Cemil Azizoglu (cemil-azizoglu)
tags: added: rotation
Changed in mir:
milestone: none → 0.10.0
status: Triaged → In Progress
PS Jenkins bot (ps-jenkins) wrote :

Fix committed into lp:mir at revision None, scheduled for release in mir, milestone 0.10.0

Changed in mir:
status: In Progress → Fix Committed
Changed in mir:
status: Fix Committed → Fix Released
Daniel van Vugt (vanvugt) wrote :

mir (0.10.0+15.04.20150107.2-0ubuntu1) vivid; urgency=medium

Changed in mir (Ubuntu):
importance: Undecided → Medium
status: New → Fix Released
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