Dialer app does not start

[Mark Raymond]

Today, I noticed the dialer app will not start. Visually, a title bar appears labelled "Phone", with the rest of the screen white (no loading spinny). This persists for less than a second before the app exits. I don't know when this started, as I don't often make calls.

According to the updates settings page, I updated to OTA-14 today, however I am suspicous of this information, as I was unaware of any system update today, and I thought I had upgraded to OTA-14 a couple of weeks ago.

I am able to recieve calls, however after accepting the call the dialer app appears and disappears as described above, and I am left with the green bar at the top indicating I'm on a call and nothing else. I can hear the other person and they can hear me as normal. Obviously I can't make any calls.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: dialer-app 0.1+15.04.20160825.2-0ubuntu1
Uname: Linux 3.4.67 armv7l
ApportVersion: 2.17.2-0ubuntu1.3touch1
Architecture: armhf
CurrentDesktop: Unity
Date: Mon Dec 26 15:04:31 2016
InstallationDate: Installed on 2016-11-18 (37 days ago)
InstallationMedia: Ubuntu 15.04 - armhf (20161118-171123)
SourcePackage: dialer-app
UpgradeStatus: No upgrade log present (probably fresh install)

[Mark Raymond (markr-i)]

It turned out that the cause of this was a corrupt QML cache, and running

rm -r /home/phablet/.cache/QML/Apps/dialer-app/

fixed the problem. So, seems like there are two underlying bugs here:

- the QML cache was corrupted
- a corrupt QML cache resulted in a crash (rather than eg detecting corruption and clearing the cache)

I don't know if either of these are specific to dialer-app or are system-wide problems that happened to be triggered on dialer-app. Unfortunately I didn't keep a copy of the corrupt cache for debugging :(

PS Thanks to Pat McGowan on the Ubuntu Phone mailing list for suggesting it might be a corrupt cache!