DSI and CSI not working at the same time

[Peviox]

im using my M8P with a CM4 4gb ram and 8gb eMMC with a PITFT 2.0 with DSI and a cheap raspicam over CSI. If i connect the display alone it works fine and displays stuff. If i connect the camera as well, the camera works but the display stops displaying or reading touchinput, not even the backlight turns on. i installed the DSI driver according to the instruction.

what could be the problem and solution here?

[Pippowicz]

The same for me,

CM4, 8GB, 32Gb EMMC, no WiFi

[hadesz]

I have the same problem. I can confirm, there's an i2c error in system log...