I've now tested the armhf and arm64 variants of Hui's test kernel from
comment #11 on the Pi 2, 3, and 4 (several memory variants) and all
seems good so far. Still need to finish testing on the compute modules,
though.

As regards flash-kernel, the relevant tickets for the missing entries
are LP: #1847587 for the 4B, and LP: #1841955 for the 3A+.

Unfortunately it turns out there's a rather more serious issue with
flash-kernel, especially in relation to this bug: it only copies the dtb
for the Pi it's being run on to the boot partition. As long as you never
switch the SD card between models of Pi that's okay, but to give an
example I ran across when testing the fixed kernel here: I upgraded the
kernel on a Pi3, tested it, switched the card to a Pi4 and it failed to
boot because the Pi4's dtb on the boot partition hadn't been updated
(and the fixed kernel has a subtly different dtb). The bug tracking this
is #1850678; I've got a fix in the works but it needs a bit of
refinement first.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1848790

Title:
  USB not working under arm64 on Pi4

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1848790/+subscriptions

-- 
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to