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 Kernel Packages, which is subscribed to linux-raspi2 in Ubuntu. https://bugs.launchpad.net/bugs/1848790 Title: USB not working under arm64 on Pi4 Status in linux-raspi2 package in Ubuntu: Confirmed Bug description: Ubuntu 19.10 arm64 on a Raspberry Pi 4 does not recognize a keyboard which works successfully on the same Raspberry Pi 4 with Ubuntu 19.10 armhf. Both USB hubs (2 and 3) were tested, without the OS seeing the keyboard on either. Booting the arm64 image on a Raspberry Pi 3, the keyboard worked successfully. Output of lsusb under arm64 on a Pi 3: ubuntu@ubuntu:~$ lsusb Bus 001 Device 007: ID 413c:2106 Dell Computer Corp. Dell QuietKey Keyboard Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Output of lsusb under armhf on a Pi 4 (same keyboard attached): ubuntu@ubuntu:~$ lsusb Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 413c:2106 Dell Computer Corp. Dell QuietKey Keyboard Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Output of lsusb under arm64 on the same Pi 4 (same keyboard attached): ubuntu@ubuntu:~$ lsusb Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub The fact even the VIA Labs hub doesn't show up (which is built in) suggests the kernel is (for some reason) unable to enumerate anything against the USB hubs. == Temporary Workaround == As noted by various people below, the following line can be added to the "usercfg.txt" file on the boot partition: total_mem=3072 This will limit the available RAM to 3Gb, but otherwise things should operate normally. Note that this bug does not affect Pi 4Bs with less than 4Gb of RAM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1848790/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
