Scrolling is slow and jerky

[L D]

Scrolling is slow and jerky in all views Artists / Albums / Genres / Songs etc

[Andrew Hayzen (ahayzen)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

This sounds potentially linked to bug 1480265, as if mediascanner is still scanning and causing a high CPU load this would make the application slower due to less resources being available.

[Michi Henning (michihenning)]

I'm seeing this too. With the attached collection (*after* mediascanner has finished indexing), open the artist tab. Thumbnails get delivered by the thumbnailer as they become available from the remote server.

When scrolling down, the display noticeably stutters and hesitates. Scroll down a few pages, now scroll back to the beginning. While scrolling in the region for which thumbnails have been cached, things are nice and fast, but scrolling forward again to the point where no thumbnails are available yet brings back the stutter.

[Michi Henning (michihenning)]

Note that, for the song list with the same collection, things are nice and smooth. Feels almost as if somewhere, a linear search is being done over the entire artist list or some such.

[Andrew Hayzen (ahayzen)]

Please note that the CardView is a custom component, and does not destroy the cards once they are out of view, hence the smoothness you will then get. We are migrating to use the GridView, which destroys the cards out of view, as this will help with memory usage, performance in general and allow us to get any new SDK parts.

The reason it is running slow is likely due to repeater being used, which is currently being investigated in [0].

0 - https://code.launchpad.net/~vthompson/music-app/fix-1515067/+merge/277306

[Jenkins Bot (ubuntu-core-apps-jenkins-bot)]

Fix committed into lp:music-app at revision 961, scheduled for release in music-app, milestone 3.0

[Jenkins Bot (ubuntu-core-apps-jenkins-bot)]

Fix committed into lp:music-app at revision 962, scheduled for release in music-app, milestone 3.0

[Michi Henning (michihenning)]

I can confirm that switching to grid view fixes the problem.

[L D (leoubuntuone)]

What do you mean by "grid view"? The only views I have available after latest update are Recent, Artists, Albums, Genres, Songs and Playlists. And the problem still exists.

[L D (leoubuntuone)]

It says fix released but I've installed all available updates and unfortunately browsing my music collection is still painfully slow and while not as quite as jerky as before, it still gets stuck.

[Daniel van Vugt (vanvugt)]

Ubuntu Touch OTA-10 had a couple of input and graphics regressions causing jerkiness compared to OTA-9. The fixes for those are not released yet, but coming in OTA-11 soon.