Slow/hanging performance
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Canonical System Image |
Confirmed
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Undecided
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Unassigned |
Bug Description
Reported on the ubuntu-phone mailing list by user Chris Go. While I can confirm this behaviour, I don't have a way to reproduce it. A few things I have noticed:
- Using krillin, stable channel, OTA-5
- It seems to happen when the phone has been on for a while
- A reboot is a workaround to fix it, until next time it happens
- While noticeable slowness in registering the digits you press on the lock screen is a symptom of this issue, sometimes the digits are slow to register, but after a while the phone becomes responsive again.
- Until a reboot, the phone effectively becomes unusable. It feels like a process is taking 100% of the CPU, but I've not managed to launch a terminal to confirm yet. Generally, it happens in a day-to-day situation on the street where you need to use the phone as opposed to being able to debug it.
Original post:
Since about a month I got those situations where my phone becomes very very slow and unresponsive.
When I press power button to unlock I try to type my unlock password, but nothing happens and after a few seconds entire password pops in (however incorrect), I try to type again - I got vibration as a feedback, but no dots representing each number form the pin.
I manage to unlock the phone, but still - phone does not react to any gesture. Even when it finally starts reacting (about 30 seconds) - those reactions are very slow.
I normally try to keep dialling app open all the time (in background) so I don't have to wait for it to load each time I want to use it. But even when I manage to switch to it - again it takes time for the phone to react to my touches.
I cannot figure when does it happen. Usually in the morning after couple hours of inactivity, but there is hardly any rule to it.
One way that I have to reproduce it (because it happens always to me) is being connected to wi-fi (I am at home), then move to an area with no connectivity (down the stairs, no wi-fi or mobile connection), finally move to an area with only mobile connection.
At this point I believe that something starts using a lot of CPU and the phone hangs but I cannot investigate what it is, because when it goes back to being responsive everything is fine.