*** This bug is a duplicate of bug 1848790 *** https://bugs.launchpad.net/bugs/1848790
I have a PI 4 (4GB) I loaded and installed the arm64 eoan USB didn't work, ssh did I set total_mem=1024 USB worked I set total_mem=3072 USB failed I set total_mem=1024 and loaded the linux image: wget https://people.canonical.com/~hwang4/rpiv2/arm64/linux-image-5.3.0-1008-raspi2_5.3.0-1008.9+newupdate_arm64.deb wget https://people.canonical.com/~hwang4/rpiv2/arm64/linux-modules-5.3.0-1008-raspi2_5.3.0-1008.9+newupdate_arm64.deb sudo dpkg -i linux-modules-5.3.0-1008-raspi2_5.3.0-1008.9+newupdate_arm64.deb sudo dpkg -i linux-image-5.3.0-1008-raspi2_5.3.0-1008.9+newupdate_arm64.deb sudo reboot USB Worked I commented out the total_mem=3072 USB failed I believe the following will help: In the raspberry pi git (4.19.y) https://github.com/raspberrypi/linux/issues/3093 hitmoon commented on 12 Aug "I've created a trivial patch to add bounce buffers on ARM64 for pcie-bcrmstb. pcie-brcmstb-bounce64.patch.zip I tried this patch, it works for me! All 4G memory is alive now, COOL !! :-) Thanks @yaroslavros ! This fixed my linux image for my home rolled 19.04 ubuntu so I hope it fixes yours -- 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/1848703 Title: Raspberry Pi 4 - USB Bus not detecting any devices Status in linux-raspi2 package in Ubuntu: Confirmed Bug description: Pi 4 new install. System boots up but USB bus is not working. Tried 3 keyboards no key presses detected, 2 usb memory drives don't show up in lsblk. output of $lspci 00:00.0 PCI bridge: Broadcom Inc. and subsidiaries Device 2711 (rev 10) 01:00.0 USB controller: VIA Technologies, Inc. VL805 USB 3.0 Host Controller (rev 01) output of $dmesg on pastebin here http://pastebin.com/h7A3n9xa or attached to this bug report. Not the only one experiencing bug. Another user created a post on the ubuntu forums: https://ubuntuforums.org/showthread.php?t=2429396&s=01a0c4b0cb4c05e605cbf9d41f660e08&p=13898142#post13898142 64bit raspberry pi 4&4 image pulled from https://ubuntu.com/download/iot/raspberry-pi page. Specifically http://cdimage.ubuntu.com/releases/19.10/release/ubuntu-19.10 -preinstalled-server-arm64+raspi3.img.xz To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1848703/+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