Stray horizontal black or dark lines in output

Software RawTherapee
1

Hi everyone and many thanks for this great piece of software!

Recently I got a new computer lined as follows

Sistema operativo: openSUSE Tumbleweed 20251007
Versión de KDE Plasma: 6.4.5
Versión de KDE Frameworks: 6.18.0
Versión de Qt: 6.9.2
Versión del kernel: 6.17.0-2-default (64 bits)
Plataforma gráfica: X11
Procesadores: 32 × Intel® Core™ i9-14900KF
Memoria: 32 GiB de RAM (31,2 GiB usable)
Procesador gráfico: NVIDIA T1000 8GB
Fabricante: Micro-Star International Co., Ltd.
Nombre del producto: MS-7E06
Versión del sistema: 3.0

Now I get random horizontal black or dark lines in Raw Therapee 5.11 output, irrespective of the demosaicing algorithm or output format used. Sometimes the lines appear in both the editor and the output, most often only in the output. See the uploaded JPG file.

img_8442
img_84425194×3456 3.87 MB

However this does not happen at all in my older, much feebler machine, at least after a dozen tests with different RAW file and output format combinations. This machine looks as follows

Sistema operativo: openSUSE Tumbleweed 20251007
Versión de KDE Plasma: 6.4.5
Versión de KDE Frameworks: 6.18.0
Versión de Qt: 6.9.2
Versión del kernel: 6.17.0-2-default (64 bits)
Plataforma gráfica: X11
Procesadores: 4 × Intel® Core™ i5-2400 CPU @ 3.10GHz
Memoria: 16 GiB de RAM (15,6 GiB usable)
Procesador gráfico: NVIDIA GeForce GT 1030

so, the OS and software level being identical, I wonder if this problem could be related with a speed-dependent race condition inside the Raw Therapee code, or some other (hardware-related?) origin. Both machines run with the default BIOS settings.

Thank you in advance for your help.

Francisco
Barcelona, Spain

2

Solved. Really I didn’t know where to look first to begin with, but later it hit upon me the idea that, being a fairly new motherboard model, it could very well be a bug in the BIOS firmware. I updated it from a late 2024 version to an August 2025 one, and now Raw Therapee runs perfectly!

Best for everyone
Paco

3 Likes
3

Curious! Makes me wonder how (a bug in) the BIOS firmware can affect the output of RawTherapee. Really strange…

4

Yes, that’s also my feeling, more so in that, looking at the descriptions of the BIOS versions in the MSI support webpage, the nature of the bug and its possible relationship with the Raw Therapee issue is anything but clear. Anyway, the BIOS upgrade solves the problem. Hope this helps in case of similar problems :wink:

Best regards,
Paco

1 Like