Fixed crashing - cause seems to be graphics card not playing nicely with DT
and Arch linux as supplied by EndeavourOS.
DT does not crash in this situation with same OS, OpenCL and same routine.

previous Graphic card - Radeon RX 5500 XT
new Graphics card - Nvidia based Gigabyte RTX 2080 card

OS - EndeavourOS LInux
OpenCL installed using rocm-opencl-runtime

Tried DT Arch repo package
Tried DT build from DT GitHub
Tried OpenCL installed and not installed and if installed, tried set on and
off in DT

In all these cases crash occurred when
- import directory of .CR3 or .CR2 files
- select a photo
- activate the RAW Overexposure Indicator


I tried other ways to fault-find but I don't know enough about packaging
and I was running out of time.

other issues to be sorted:
watermark text doesn't show up in DT darkroom
Canon mirrorless R cameras not in list - R, RP, R5, R6.
I'll check the manual then ask if I get stuck.

Sorry about reporting the lack of png watermarks - should have read the
handbook (I didn't have any pngs for DT to find.

Thanks for reading.
Alex

On Thu, 6 Jan 2022 at 13:21, Patrick Shanahan <p...@opensuse.org> wrote:

> * Alex Delaforce <123.adelafo...@gmail.com> [01-05-22 19:29]:
> > Hi All,
> > 1. Thanks for all the work done to get us 3.8.0
> > 2. Great to see Bruce Williams back online despite having a difficult
> year
> > - all the best Bruce.
> >
> > To business - sorry this is a long email, I'm not assuming you have time
> to
> > read this.
> >
> > Fresh install of Darktable from Arch Repository on EndeavourOS Gnome -
> > OpenCL running (to start with see *)
> > These may be problems with the package made for Arch (Q. is this likely
> the
> > problem?).
> >
> >
> > *Problems*
> > 1. Import *CR3* files (Canon R5 - 10 images in a folder) - give four
> images
> > a star value - open one image - select RAW overexposure indicator -
> > Darktable shuts down after showing working message for a very short time
> > (0.5 secs)
> >
> > Thought I'd check if this was a CR2 thing
> >
> > 2. Attempt a *CR2* import (folder of 18 images) - import starts and
> shows a
> > few files in lightable then Darktable shuts down. Reopen DT, go to open
> the
> > Collection in lightable that caused the crash - catalogue starts to open
> > (looks like import may have finished despite the DT interface crashing
> part
> > way through) then DT closes again.
> >
> > *I have found that I can successfully work around 1 and 2 if I turn off
> > OpenCL (I installed the rocm-opencl-runtime)
> >
> > 3. Watermark problems (CR3)
> > With OpenCl off (as described above) ... processed one image ...
> attempted
> > to add a watermark
> > 1. Can't see .png file in the selection menu - (darktable, hasselblad,
> > promo and simple text svg selection only)
> > 2. Simple Text interface works fine but text doesn't show on image in
> > darkroom view
> > In lighttable view no watermark but if I selectively copy and paste to
> > three other images in the same folder (collection) the watermark now
> shows
> > on all image in lighttable view but not darkroom view for any of them. Go
> > back to lightable view and watermark not visible again.
> >
> > 4. Thought I would try the RAW overexposure indicator on CR2 with OpenCL
> on
> > Select CR2 collection, pick one image in lighttable, go to options and
> turn
> > on OpenCL. Thought I had best restart DT so shutdown and reopen DT and DT
> > shows the interface, a grey square where the selected image would be in
> > lighttable then crashes. Tried 5 times - crashes in same way five times.
> >
> > I'm on an Intel i7-9700KF CPU with Radeon RX 5500XT graphics card
> >
> > As asked above, Is this likely to be a package problem? Should I attempt
> my
> > own build from the instruction on the darktable site (not experienced at
> > this).
> > I also am not sure if OpenCl is correctly installed but the DT prompt on
> > finding OpenCl usable appeared when I started DT after installing
> > rocm-opencl-runtime (I tried opencl-amd first but this didn't give a
> > successful install as it has for me on previous distros - I'm coming back
> > to linux after 6 months on Windows - previously used Manjaro  and have
> used
> > Ubuntu  successfully with DT)
> >
> > All this within my first 10 mins of using 3.8.0
> > Any advice would be gratefully received.
> >
> > I'm no guru but I'll be demonstrating DT a photo club workshop in Feb so
> I
> > want to know what can and can't do in front of my club without looking a
> > total pillock 😀
>
> from what I have read here, more likely a problem with openCL on your
> system related to the radeon card, as you have observed and not dt.
>
>
> --
> (paka)Patrick Shanahan       Plainfield, Indiana, USA          @ptilopteri
> http://en.opensuse.org    openSUSE Community Member    facebook/ptilopteri
> Photos: http://wahoo.no-ip.org/piwigo                   paka @ IRCnet oftc
> What sort of day was it?                  A day like all days, filled with
> those events that alter and illuminate our times...
>
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