Hi all,
After spending almost a week to find out what is the culprit that causes my ASI120MC(non-S) having inconsistent frames when looping and guiding, last night I tried my last possibilities and it successfully solved my USB 2.0 camera issue (maybe temporarily?? Let see).
What I've done is I downgraded the VL805 firmware in rpi4 to
0137ab which I found this is the most stable firmware from VIA ever. But with one condition, I believe you will lose the abilities in SSD booting and other features from the latest firmware implementation. Which for me a microSD card enough for everything. I do not need an SSD hard drive or whatsoever to boot.
That's your choice.
For those who wish to keep his USB 2.0 guide cam, you can drop by this website to read up and download the 0137ab firmware file.
www.raspberrypi.org/forums/viewtopic.php?f=28&t=250990
I already temporarily disable the rpi-eeprom-update with this command <
sudo systemctl mask rpi-eeprom-update > and change the firmware release status to
stable by issuing this in command <
sudo nano /etc/default/rpi-eeprom-update >
So, I hope it does help and save some money on replacing things that not yet broken.
Clear skies.
Tom