Reiner,

On Mon, Jan 19, 2026 at 12:40:07PM +0100, Reiner wrote:
> you are right, it is freia. I'm new to devuan and a long time debian user;-)

Welcome!

> I'm not familiar with gdb or gdb backtrace. Assuming one has to start
> manually a debug version of

The basic contents of Debian Wiki[1] are still relevant, with the exception of
systemd-specific material. The dbgsym packages for forked packages are in
Devuan's main archive.

> If you can give me a short guide what to do, than I can try to make a gdb
> backtrace.

I would start with something like:-

1. Install colord-dbgsym

    apt install colord-dbgsym

2. Ensure colord-sane is not running

    pkill colord-sane

3. Unplug the triggering USB phone/device

4. Start colord-sane under gdb

    sudo gdb /usr/libexec/colord-sane

5. Plug in the segfault triggering device

6. Hopefully gdb will catch the segfault and you can run

    bt

Feel free to try irc://libera.chat/#devuan-dev if you need more help.

Mark

[1] https://wiki.debian.org/HowToGetABacktrace