@hui.wang - I tested the compiled kernel on my RaspberryPi4 (4GB RAM model). Both KVM and external SSD/USB (in my case Samsung T5, 500GB external SSD) on the USB 3.0 port are working fine:
root@cloudstack-mgmt:~# ls /dev/kvm /dev/kvm root@cloudstack-mgmt:~# kvm-ok INFO: /dev/kvm exists KVM acceleration can be used root@cloudstack-mgmt:~# lsusb Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 04e8:61f5 Samsung Electronics Co., Ltd Portable SSD T5 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub # fdisk -l [.. snipped ..] Disk /dev/sda: 465.78 GiB, 500107862016 bytes, 976773168 sectors Disk model: Portable SSD T5 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 33553920 bytes Disklabel type: dos Disk identifier: 0x00000000 Device Boot Start End Sectors Size Id Type /dev/sda1 2048 976773134 976771087 465.8G c W95 FAT32 (LBA) root@cloudstack-mgmt:~# blkid -o list device fs_type label mount point UUID ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- /dev/mmcblk0p1 vfat system-boot /boot/firmware 79A2-EC62 /dev/mmcblk0p2 ext4 writable / 2fae1f20-4a20-4c77-a39b-fb6480f64a0b /dev/loop0 squashfs /snap/lxd/12210 /dev/loop1 squashfs /snap/core/7920 /dev/sda1 ext4 (not mounted) 91175b3a-ee2c-47a7-a1e5-f4528e127523 This confirms that the patch and kernel-image build by @hui.wang fixes the external USB storage issue with the 4GB RPi4 model. Thanks @hui.wang. -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
