Very slow listing and scrolling a PTP connected photo directory.

[Jarno Suni]

I connected Samsung Galaxy S5 Mini smart phone via PTP mode USB connection. When I enter a photo directory, displaying it is very slow. A 100 item directory takes about 20 sec to show. Also scrolling is very unresponsive. Even moving to top folder from the photo folder is very slow.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: thunar 1.6.3-1ubuntu5
ProcVersionSignature: Ubuntu 3.13.0-36.63-lowlatency 3.13.11.6
Uname: Linux 3.13.0-36-lowlatency x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Oct 5 12:35:46 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-09-21 (14 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.1)
SourcePackage: thunar
UpgradeStatus: No upgrade log present (probably fresh install)

[Jarno Suni (jarnos)]

pcmanfm works faster with the same directories

[Jackson Doak (noskcaj)]

Does your phone have different modes for when it's plugged in (e.g. camera,
media device)? If so, does changing the mode affect this?

On Sun, Oct 5, 2014 at 8:51 PM, Jarno Suni <email address hidden>
wrote:

> pcmanfm works faster with the same directories
>
> --
> You received this bug notification because you are a member of Xubuntu
> Bugs Team, which is subscribed to thunar in Ubuntu.
> https://bugs.launchpad.net/bugs/1377585
>
> Title:
> Very slow listing and scrolling a PTP connected photo directory.
>
> Status in “thunar” package in Ubuntu:
> New
>
> Bug description:
> I connected Samsung Galaxy S5 Mini smart phone via PTP mode USB
> connection. When I enter a photo directory, displaying it is very
> slow. A 100 item directory takes about 20 sec to show. Also scrolling
> is very unresponsive. Even moving to top folder from the photo folder
> is very slow.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: thunar 1.6.3-1ubuntu5
> ProcVersionSignature: Ubuntu 3.13.0-36.63-lowlatency 3.13.11.6
> Uname: Linux 3.13.0-36-lowlatency x86_64
> ApportVersion: 2.14.1-0ubuntu3.5
> Architecture: amd64
> CurrentDesktop: XFCE
> Date: Sun Oct 5 12:35:46 2014
> EcryptfsInUse: Yes
> InstallationDate: Installed on 2014-09-21 (14 days ago)
> InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release
> amd64 (20140722.1)
> SourcePackage: thunar
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/thunar/+bug/1377585/+subscriptions
>

[Jarno Suni (jarnos)]

Yes, the camera mode is the PTP mode described above. If I choose MTP mode i.e. media device mode, I can list files in a file manager fast, but not read them at all. This goes for both file managers.

[Jarno Suni (jarnos)]

How could I report about the MTP bug?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[b3nmore (b3nmore)]

I believe this is related to thumbnail handling. It seems that thunar recreates the thumbnails on every scroll event. So if one disables 'Show thumbnails' in the preferences, scrolling is very fast. This behavior is also found for mtp connections.

Upstream report: https://bugzilla.xfce.org/show_bug.cgi?id=12111