Bug 484246

Summary:	Skanlite 24.02.0 randomly detects my EPSON XP-247's scanner's dimensions as 16 557 mm wide upon initialization
Product:	[Applications] Skanlite	Reporter:	Roke Julian Lockhart Beedell <4wy78uwh>
Component:	general	Assignee:	Kåre Särs <kare.sars>
Status:	RESOLVED WORKSFORME
Severity:	normal	Flags:	4wy78uwh: performance-
Priority:	NOR
Version First Reported In:	24.02.0
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
URL:	https://discuss.kde.org/t/thats-quite-a-bold-default-skanlite/12802?u=rokejulianlockhart
See Also:	https://bugs.kde.org/show_bug.cgi?id=484678
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Depiction of the problem.

Description Roke Julian Lockhart Beedell 2024-03-22 13:44:01 UTC

SUMMARY
Skanlite randomly detects scanner dimensions as 14 metres wide upon initialization, and necessitates a reinitialization to remediate it.

STEPS TO REPRODUCE
1.  Install cpe:/o:opensuse:tumbleweed:20240320.
2.  Install https://download.opensuse.org/repositories/openSUSE:/Factory/standard/x86_64/epson-inkjet-printer-escpr-1.7.22-2.1.x86_64.rpm.
3.  Install https://download.opensuse.org/repositories/openSUSE:/Factory/standard/x86_64/skanlite-24.02.0-1.1.x86_64.rpm.
4.  Connect the scanner.
5.  Confirm it is listed as connected in kcm_printer_manager.
6.  Invoke "gdb skanlite" with debuginfod enabled.

OBSERVED RESULT
https://discuss-cdn.kde.org/uploads/default/original/2X/7/7a1d2a0d17e4484469b97ab1a3f03a2e1668e4a6.png

EXPECTED RESULT
It should always detect the correct dimensions of my scanner.

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20240320
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.8.1-1-default (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor
Memory: 30.5 GiB of RAM
Graphics Processor: AMD Radeon RX 5700
Manufacturer: ASRock
Product Name: X670E Taichi

ADDITIONAL INFORMATION
*  I use an EPSON Expression Home XP-247, and used to experience the same on my previous 245.
*  I've set the https://bugs.kde.org/page.cgi?id=fields.html#bug_severity to “normal” because this *necessitates* reinitialization of Skanlite to remediate, which is unintuitive.

Comment 1 Roke Julian Lockhart Beedell 2024-03-22 13:50:26 UTC

(In reply to `{third: "Beedell", first: "Roke"}`{.JSON5} from comment #0)
Sorry, not “[approximately] 14 metres” — specifically, 16557 mm.

Comment 2 Kåre Särs 2024-03-25 06:52:31 UTC

Thanks for the report.

This looks like a backend issue, possibly caused by trying to restore settings from the previous session...

Can you try to run Skanlite with debug logging enabled for the epson2 backend?

The command to run in a terminal would be something like:

SANE_DEBUG_EPSON2=16 skanlite

And maybe play with the number a bit to see what gives a reasonable output, the values go from 1 to 128 and 128 returns all possible debug output...
Then attach the output here,

Thanks in advance,
  Kåre

Comment 3 Roke Julian Lockhart Beedell 2024-03-28 18:48:47 UTC

Created attachment 167902 [details]
Depiction of the problem.

https://discuss-cdn.kde.org/uploads/default/original/2X/7/7a1d2a0d17e4484469b97ab1a3f03a2e1668e4a6.png

Comment 4 Roke Julian Lockhart Beedell 2024-03-28 18:49:47 UTC

(In reply to Kåre Särs from comment #2)
So I've tried that, and quite unexpectedly discovered both https://bugs.kde.org/show_bug.cgi?id=484675#c0 and https://bugs.kde.org/show_bug.cgi?id=484678#c0 during the course of it. However, I've not been able to reproduce *this* on my new Fedora 40 installation (yet?).

Comment 5 Roke Julian Lockhart Beedell 2024-03-29 18:19:53 UTC

(In reply to `{third: "Beedell", first: "Roke"}`{.JSON5} from comment #4)
I thought it could be because I was using a combination of different locales for different things, but switching a few to C hasn't worked. I think I'll close this until it occurs again, but I'll ensure that I run Skanlite with the debugger from here onward in case it does again.