Pixelfed account: https://pxlmo.com/buffy
It is like the playback mode of your camera, just with replacing the camera’s little screen with a large screen. That’s what the HDMI output of most photo cameras is made for.
I understand that this is the original purpose of the HDMI output of this particular camera. But why is it behaving differently when the HDMI output is a USB capture card compared to a TV? That’s what is puzzling me
Your search term is
nikon d3200 “tethered shooting”
I understand that tethered shooting is a thing (kind of) for this camera. But from what I find online, full control isn’t exactly possible with the Nikon D3200. See, for instance, this link or this.
Many years ago, using gphoto2
and video 4 linux
, I could remotely activate the shutter and download images (but low res only), live stream through USB, but I couldn’t remotely control aperture, ISO, or focus. So it seems to me that it isn’t possible to fully control this particular model through tethered shooting.
Anyway, my main point is: I am still confused why the output would be different using a USB/HDMI capture card versus a TV; even though the camera should in principle send the same information to both devices.
Indeed it looks like a bug. I finally found a solution, though. Check the main post edit for details.
Thanks for the reference! Just to be clear, I am no longer interested in live streaming/DSLR as webcam. Nowadays I want to use my computer or a field monitor for tricky focusing situations (macro/astro). Would you know whether a field monitor connected to the camera would output something similar to the USB capture card/computer setup or the TV?
I will very likely migrate to BTRFS on my next install. I’m reading Snapora’s repo now, looks like an awesome tool. Thanks for the tip!
I did check it, yes, but the page doesn’t appear to be relevant or contain much information. Another comment above (or below) mentioned that KDE Plasma can’t run without a compositor.
You are right, I should have made this clear. I am not on Nvidia, I am using an old Thinkpad on Intel Haswell.
I’m glad to know my problem isn’t completely new. I’ll look into it further online. If you ever find a link to a report of a similar issue, I would be happy to see!
Edit: I found this link, the issue reported appears to be very similar to what I’m seeing here https://libreddit.tux.pizza/r/kde/comments/jhqbnz/kde_plasma_rendering_problem_black_squares/
Edit 2: I finally solved my problem! It was indeed an old problem already reported somewhere.
You are absolutely right. I just tried apt purge kde* plasma* libkf*
and apt install kde-full
followed by a reboot. But sadly, the problem persists.
I agree with that. I suspect you might be right. SDDM (Breeze) is also weird with transparency. However, I just installed materia-kde
but unfortunately the problem persisted (screenshot attached). Before that, I ran apt purge kde* plasma* libkf*
and apt install kde-full
. That too didn’t solve my problem.
Tasksel seems to be correctly set,
~$ tasksel --list-tasks
i desktop Debian desktop environment
u gnome-desktop GNOME
u xfce-desktop Xfce
u gnome-flashback-desktop GNOME Flashback
i kde-desktop KDE Plasma
u cinnamon-desktop Cinnamon
u mate-desktop MATE
u lxde-desktop LXDE
u lxqt-desktop LXQt
u web-server web server
u ssh-server SSH server
i laptop laptop
I tried apt reinstall kde-full
, but unfortunately nothing changed.
I tried reinstalling kde-full, but sadly nothing happened (all packages were already marked as installed).
I audibly laughed at this. I actually knew I was entering treacherous waters by running apt full-upgrade
in Sid, but still thought “well, we’ll see…”
Thanks! Some packages were installed, but it didn’t solve it yet (even after a reboot).
...
Install: orca:amd64 (46.0-1, automatic), libpcaudio0:amd64 (1.2-2+b2, automatic), speech-dispatcher-audio-plugins:amd64 (0.11.5-4, automatic), python3-brlapi:amd64 (6.6-5, automatic), xbrlapi:amd64 (6.6-5, automatic), speech-dispatcher-espeak-ng:amd64 (0.11.5-4, automatic), libsonic0:amd64 (0.2.0-13, automatic), sound-icons:amd64 (0.1-8, automatic), python3-speechd:amd64 (0.11.5-4, automatic), libespeak-ng1:amd64 (1.51+dfsg-12, automatic), python3-louis:amd64 (3.29.0-1, automatic), x11-session-utils:amd64 (7.7+6+b1, automatic), xkbset:amd64 (0.8-1, automatic), task-desktop:amd64 (3.75, automatic), libdotconf0:amd64 (1.3-0.3+b1, automatic), xorg:amd64 (1:7.7+23, automatic), perl-tk:amd64 (1:804.036+dfsg1-2+b1, automatic), x11-apps:amd64 (7.7+11+b1, automatic), speech-dispatcher:amd64 (0.11.5-4, automatic), espeak-ng-data:amd64 (1.51+dfsg-12, automatic), task-kde-desktop:amd64 (3.75), xinit:amd64 (1.4.2-1, automatic)
End-Date: 2024-03-26 17:42:41
If I am not mistaken, I used a Debian KDE live image from the official repository then switched the mirrors from Bookworm to Sid. The system went months without a single issue, then this happen.
Your suggestion will actually be my solution of choice if everything else fails: reinstall / and import relevant files from a backup that I already have.
Thanks for the tip! However, I tried apt reinstall kde-full
and apt --fix-broken install
, but no packages were installed and (unsurprisingly) the problem still persists.
The Gentoo sub had such a nice subtitle because it is indeed accurate! Definitely one of the things I like the most about “flexible” distros.
“Gentoo Linux: Because you like it when the power is in your hands”
Yeah, I tried installing kde-full but it didn’t solve my problem.
Thanks for the recommendation! I will definitely do it when I eventually install some other distro in the future.
I do store regular backups of this machine, but not of /var. I can always reinstall Debian (or whatever other distro), while keeping other relevant configs intact (stored in the backups) and not lose any critical data.
I commented below that I did check /var/log/dpkg.log, but it didn’t help much due to the high number of packages removed that day.
At this point I am more curious to learn more about KDE and what is causing the problem, since other desktop environments (I installed mate) seem to work fine.
Sadly I am not using BTRFS for my root directory on this specific system. If I end up deciding to reinstall, I will definitely go back to BTRFS to avoid such problems.
Debian actually has a KDE group named kde-full. I reinstalled it but the issue persists, which was honestly surprising to me.
~$ sudo apt install kde-full
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
kde-full is already the newest version (5:147).
0 upgraded, 0 newly installed, 0 to remove and 87 not upgraded.
The new user idea was really clever, thanks for the suggestion! I will try that now and see.
Edit: the new user also presents the same problem. Actually, it makes sense, since SDDM is affected as well (I should have mentioned that before).
You are absolutely correct. My TV supports HDMI-CEC, so if “Device control” is set to “On” under the “HDMI” tab, the camera will display a slideshow whenever connected to a HDMI-CEC device. If “Device control” is set to “Off” or if the screen doesn’t support CEC, then a mirrored image of the camera’s screen will be transmitted.
You can check my main post edit for details.
I really appreciate your help!