Fixed links User on lingon on raspberry pi forum posted the following:
The USB-problem concerning the Raspberry Pi 4GB RAM model might be due to the issue seen earlier that using more RAM than 3072 MB breaks the USB: [url]https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=246766&start=25[/url] The issue was solved by a kernel patch: [url]https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=246766&start=50#p1517839[/url] and the kernel patch was this one: [url]https://github.com/raspberrypi/linux/issues/3093#issuecomment-520269280[/url] -- 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. 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
