cxadc-linux3
cxadc-linux3 copied to clipboard
happycube
/dev/cxadc0 stops sending data
Having a weird issue where using cat /dev/cxadc0 > file.u8 will only generate a short burst of data.
However, hitting a keyboard key will nudge it and it will start capturing another short burst.
Holding down a key generally allows the data to flow as expected.
Same behavior exists when using ffplay to monitor the stream, or cat /dev/cxadc0 | pv > file.u8 (shows a burst of data around 30-50MB/s, then drops to 0.)
kernel 5.10.0 / debian 11
I'm seeing a similar issue, only getting a short burst of data then gives rubbish data, with lots of "cxadc 0000:04:00.0: interrupt stat 0x8000 masked 0x8000". So I'm suspecting something in the interrupt handling is a bit awry, or could possibly be a hardware fault with mine. This is a white generic CX25800 card, the VT-6X0 card in the docs. I'd like to test on the CX88 drivers to eliminate that but the card comes up as unsupported. Any clues?
Just to follow up, removing all other pci-e cards and switching slots seemed to resolve my issue. It actually only worked in the furthest slot from the cpu on my Asus x79 board.
Cheers - yeah tried that today to no avail, still just seems to stop completely after a short burst, or not get any data at all regardless of slot!
Just to close the loop on this one for future readers - it was hardware, something to do with that motherboard, no combination of hardware swapping or kernel parameters made any effect. I swapped the whole machine out and installed the CX25800 card into another machine and all works fine...