Garbled display with kernels 5.15 and 5.14
11-07-2021, 06:30 AM
(11-07-2021, 04:14 AM)kuleszdl Wrote: Why have you tried using a more recent kernel than the 5.10 kernel shipped in bullseye btw?
Three reasons:
- Display does not turn on with the Bullseye kernel (I believe this is due to CONFIG_ROCKCHIP_CDN_DP in combination with the shipped DTB)
- Keyboard does not work until after I unlock the encrypted root (I believe this could be worked around by manually including a number of seemingly unrelated modules into the initrd, which in my kernel are configured as builtin)
- DisplayPort over USB-C does not work (but I haven't gotten it to work with the self-compiled kernel either). This is mainly "I'll just try the next kernel version, let's see what happens then".
Side note: On my RockPro64, the first two issues don't exist (HDMI monitor works perfectly fine and the standard USB keyboard does not require any unexpected modules) and I don't really care about the DisplayPort issue, so I just run Debian's stock kernel on the RockPro64.
