[Bug 1908459] [NEW] Dolphin extremely slow to start on Raspberry Pi

[Wayne Schroeder]

Public bug reported:

Dolphin takes ~7+ seconds to start after launch.  It appears to be
spinning on scanning for DRI devices.  It is not io bound or cpu bound,
it's just doing a lot of scanning of the file system for what appears to
be rendering devices (out of my element here) and it REALLY shows up as
a delay on a pi device.  This is a 4b with 8 gig of ram and I can verify
that this behavior is not in debian stable but is present in debian
testing (when I shoehorned it in on, lol), and from what I can tell, the
same thing happens on my x86 machines, but they're just so fast in
comparison that this doesn't show up.  Strace logs are attached.  I also
reported this directly to the KDE team (not ubuntu) as I'm not sure if
this is a software or setup thing.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: dolphin 4:20.08.2-0ubuntu1
ProcVersionSignature: Ubuntu 5.8.0-1010.13-raspi 5.8.17
Uname: Linux 5.8.0-1010-raspi aarch64
ApportVersion: 2.20.11-0ubuntu50.3
Architecture: arm64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Wed Dec 16 17:53:55 2020
ExecutablePath: /usr/bin/dolphin
ImageMediaBuild: 20201022
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: dolphin
UpgradeStatus: No upgrade log present (probably fresh install)
XsessionErrors:
 (tracker-miner-fs:2024): Tracker-CRITICAL **: 09:43:02.257: Could not request DBus name 'org.freedesktop.Tracker1.Miner.Files': D-Bus service name:'org.freedesktop.Tracker1.Miner.Files' is already taken, perhaps the application is already running?
 (tracker-extract:2020): Tracker-CRITICAL **: 09:43:03.035: Could not request DBus name 'org.freedesktop.Tracker1.Miner.Extract': D-Bus service name:'org.freedesktop.Tracker1.Miner.Extract' is already taken, perhaps the application is already running?
 (tracker-miner-fs:1687): Tracker-CRITICAL **: 12:28:50.140: Could not request DBus name 'org.freedesktop.Tracker1.Miner.Files': D-Bus service name:'org.freedesktop.Tracker1.Miner.Files' is already taken, perhaps the application is already running?
 (tracker-extract:1690): Tracker-CRITICAL **: 12:28:51.743: Could not request DBus name 'org.freedesktop.Tracker1.Miner.Extract': D-Bus service name:'org.freedesktop.Tracker1.Miner.Extract' is already taken, perhaps the application is already running?

** Affects: dolphin (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug arm64 groovy

** Attachment added: "Strace with timestamp of issue."
   https://bugs.launchpad.net/bugs/1908459/+attachment/5444338/+files/dolphin-ts.log

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Title:
  Dolphin extremely slow to start on Raspberry Pi

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