I guess this may not be an indilib/kstars problem, more of a USB-problem, but let's try it anyway:

I recently got a QHY5III715C planet camera. It works OK in Kubuntu 22.04 (indilib 2.0.3) and Windows 10 (N.I.N.A).
But on the same PC (which I triple-boot) it doesn't work on OpenSuse Tumbleweed.

On Kubuntu 22.04 I test with dmesg -w which gives me:

[ 766.173935] usb 4-5: USB disconnect, device number 4
[ 770.541945] usb 3-10: new high-speed USB device number 8 using xhci_hcd
[ 770.690377] usb 3-10: New USB device found, idVendor=1618, idProduct=0715, bcdDevice= 1.00
[ 770.690381] usb 3-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 770.690382] usb 3-10: Product: WestBridge
[ 770.690383] usb 3-10: Manufacturer: Cypress
[ 770.690384] usb 3-10: SerialNumber: 0000000004BE
[ 770.773374] usb 3-10: USB disconnect, device number 8
[ 771.053960] usb 4-6: new SuperSpeed USB device number 5 using xhci_hcd
[ 771.078525] usb 4-6: LPM exit latency is zeroed, disabling LPM.
[ 771.079195] usb 4-6: New USB device found, idVendor=1618, idProduct=0716, bcdDevice= 0.00
[ 771.079206] usb 4-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 771.079211] usb 4-6: Product: QHY715U3G20-20230106
[ 771.079216] usb 4-6: Manufacturer: QHYCCD

Seems OK and it works..

On Opensuse the output is only:
[ 766.173935] usb 4-5: USB disconnect, device number 4
[ 770.541945] usb 3-10: new high-speed USB device number 8 using xhci_hcd
[ 770.690377] usb 3-10: New USB device found, idVendor=1618, idProduct=0715, bcdDevice= 1.00
[ 770.690381] usb 3-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 770.690382] usb 3-10: Product: WestBridge
[ 770.690383] usb 3-10: Manufacturer: Cypress
[ 770.690384] usb 3-10: SerialNumber: 0000000004BE

and there it stops!

Some USB-driver problem or what?

I have the same problem on a Mele mini-PC running Kubuntu 23.04.

Håkan Wahlberg

May not help but may enclose the issue: I tested the camera on a Mele 3Q using Ubuntu 22.03 and Kstars from ppa: no problem.
And I tested it on my main PC with Opensuse 15.5 and Kstars 3.6.6/INDI 2.0.3: also no problem

Answer my own question might help someone else.

The problem were:
1. On some distributions, the 85-qhyccd.rules was missing in /etc/udev/rules.d (despite repositories, strange!)

2. On one distribution, the line:
ATTRS{idVendor}=="1618", ATTRS{idProduct}=="0715", RUN+="/sbin/fxload -t fx3 -I /lib/firmware/qhy/QHY5III715.img -D $env{DEVNAME}"
was missing.

3. On MeLE fxload didn't support microcontroller fx3, I had the get the source for that and compile it.

So it was a mess, but now it works.Looking forward for some moon and planetary shots!

Håkan W