[Pkg-xfce-devel] Bug#801729: lightdm-gtk-greeter: Keystrokes lost when typing fast on slow systems

Julian Calaby julian.calaby at gmail.com
Tue Oct 13 22:33:52 UTC 2015

Package: lightdm-gtk-greeter
Version: 2.0.1-2
Severity: normal

Dear Maintainer,

My system uses a very slow USB thumb drive as it's main disk. When logging in, the greeter pauses for a moment after the first character in the username or password is entered and loses the next few keystrokes if they are typed in quickly.

For example, if I were to quickly type "lightdm" as a username, the text that would end up in the username box would be "ltdm".

This happens during bootup when the disk is being accessed by services which are still starting and the system is consequently fairly heavily loaded. It appears that GTK or lightdm loads something after the first key stroke which takes an amount of time which is longer than the time between key strokes.

Waiting for the cursor to re-appear after typing the first character before continuning to type in my username or password works as expected, however is less than ideal as I type them by muscle memory.

I would expect that this would be reproducable with a virtual machine running off an old or slow thumb drive. I find that physically smaller thumb drives have slower write speeds, which seems to be the limiting factor.


Julian Calaby

-- System Information:
Debian Release: stretch/sid
  APT prefers testing-proposed-updates
  APT policy: (500, 'testing-proposed-updates'), (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 4.2.0-1-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_AU.utf8, LC_CTYPE=en_AU.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages lightdm-gtk-greeter depends on:
ii  libc6                   2.19-22
ii  libcairo2               1.14.2-2
ii  libgdk-pixbuf2.0-0      2.32.1-1
ii  libglib2.0-0            2.46.0-2
ii  libgtk-3-0              3.16.6-1
ii  liblightdm-gobject-1-0  1.16.2-1
ii  libx11-6                2:1.6.3-1

Versions of packages lightdm-gtk-greeter recommends:
ii  desktop-base               8.0.2
ii  gnome-icon-theme-symbolic  3.12.0-1
ii  gnome-themes-standard      3.18.0-1
ii  policykit-1                0.105-12

lightdm-gtk-greeter suggests no packages.

-- debconf information:
  lightdm-gtk-greeter/lightdm-greeter: lightdm-gtk-greeter
* shared/lightdm-greeter: lightdm-gtk-greeter

More information about the Pkg-xfce-devel mailing list