** Changed in: mir (Ubuntu)
Status: Fix Released => Triaged
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https://bugs.launchpad.net/bugs/1496069
Title:
[usc] Mir gives up and shuts down due to input with multimonitor qtmir
(std::exception::what: Failure sending input event)
Status in Mir:
Fix Released
Status in mir package in Ubuntu:
Triaged
Bug description:
I'm implementing proper multimonitor support in QtMir in this branch:
lp:~gerboland/qtmir/multimonitor/
Please build & install on device. You don't need to change unity8. The
immediate goal is for unity8 to remain on the tablet screen, and have
nothing (well a black screen) drawn on the external monitor.
This is mostly happening, but I'm experiencing problems related to
input.
Steps to repro:
1. When you plug in the external monitor, nothing will appear on it (for
later), but unity8 should still be interactive on the N7
- unity8 will flicker when the display config changes, due to it tearing
down the old gl context and creating a new one.
- unity8 is not getting any touch input events. I checked that USC is not
sending it any. [1]
- however the vol up/down key does cause the volume notification to
appear.
2. Now unplug the external monitor.
- *sometimes* unity8 works fine, gets input events again just fine and
works great.
- *sometimes* unity8 crashes as soon as you tap on the screen. It crashes
because USC shuts down [2]! Relevant failure message:
ERROR:
/home/gerry/dev/projects/mir/mir-0.15/src/server/input/android/input_sender.cpp(218):
Throw in function void
mir::input::android::InputSender::ActiveTransfer::send(mir::input::android::InputSendEntry&&)
Dynamic exception type:
N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE
std::exception::what: Failure sending input event :
9, "Bad file descriptor"
Something gone screwy with input then.
Perhaps QtMir needs to do something special to its input receiver when the
multimonitor situation changes and its surface is destroyed & recreated??
Guidance appreciated
-G
[1] http://pastebin.ubuntu.com/12418660/ - is USC log with input reporting
enabled. Started with 1 monitor, then was 2, then 1 again. Observe while in
multimonitor case, no input events are "Published" and "Received"
[2] http://pastebin.ubuntu.com/12419006/ - USC backtrace when it shuts down
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