Ubuntu
network-manager package

[arale/krillin] Toggling wifi on/off causes media playback to hiccup

Bug #1388201 reported by Jim Hodapp
40
This bug affects 10 people
Affects Status Importance Assigned to Milestone
Canonical System Image
Confirmed
Undecided
Unassigned
Network Menu
Invalid
High
Unassigned
network-manager (Ubuntu)
Incomplete
Medium
Unassigned

Bug Description

1. Play a song with music-app
2. Switch wifi off, notice that music-app playback pauses for a moment
3. Switch wifi on, notice that music-app playback pauses for a moment
4. Watch the CPU usage with top while toggling wifi and notice that the usage spikes to 100%

Expected results:

Music or video keeps playing without pausing while toggling wifi on/off

Revision history for this message
Jussi Pakkanen (jpakkane) wrote :

The same bug was filed a long time ago. Because this bug can be reproduced without touching indicator-network (by sending the wifi disable commands from the command line) it was reassigned, but I can't for the life of me find what project it was assigned to.

I would assign this bug as a duplicate of that one, but as I can't find it now I'm just going to close this. If you can find a sequence of steps where this occurs only when doing the toggle in indicator-network but not when doing the same from the command line, feel free to reopen.

Changed in indicator-network:
status: New → Invalid
Revision history for this message
Jim Hodapp (jhodapp) wrote :

I would like to make sure that this is still assigned in a different project and still planned on being fixed. Can you think of someone else to ask who might know where this bug report actually lives?

Revision history for this message
Jim Hodapp (jhodapp) wrote :

I got this bug filed in the appropriate place now.

Revision history for this message
Matthew Paul Thomas (mpt) wrote :

I found it.

Revision history for this message
Pete Woods (pete-woods) wrote :

Worth looking at: https://bugs.launchpad.net/barajas/+bug/1383236

Changed in indicator-network:
importance: Undecided → High
Changed in network-manager (Ubuntu):
importance: Undecided → High
Revision history for this message
Simos Xenitellis  (simosx) wrote :

There are more details in the duplicate #1447077.

Pete Woods (pete-woods)
Changed in canonical-devices-system-image:
status: New → Confirmed
Changed in network-manager (Ubuntu):
importance: High → Medium
Tony Espy (awe)
Changed in network-manager (Ubuntu):
status: New → Incomplete
Revision history for this message
Tony Espy (awe) wrote :

This bug is specific to arale, krillin, and most likely vegatta ( although as I don't have once, I haven't been able to test ). It's related to the fact that on devices using MTK's Wi-Fi driver, we're forced to use hybris for power control of the Wi-Fi radios. This leverages the Android HAL functions wifi_load/unload_driver(). On systems configured without kernel modules, this results in a driver command to start/stop Wi-Fi ( this is accomplished by writing the string "0" or "1" to the character device ( /dev/wmtWiFi ).

I just checked mako ( rc-proposed, #222 ) and no stuttering occurs when Wi-Fi is enabled or disabled.

Also re-checked arale ( rc-proposed, #88 ) and krillin ( rc-proposed, #104 ) and both still skip/stutter when Wi-Fi is toggled.

Bug #1487529 reported for arale.

summary: - Toggling wifi on/off causes media playback to hiccup
+ [arale/krillin] Toggling wifi on/off causes media playback to hiccup
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