Could be related but i have different symptoms. I can still reboot the pi and nothing hangs (except IO to the disconnected drives of course).
I have tried more things to debug this. It seems that on raspi-os with the same setup the USB controller does not crash but some seagate drives still disconnect randomly. They keep spinning up and disconnecting after that. Only fix is a reboot.
It also happens less frequently on USB2. I don't get why. Sound like a thermal issue to me, but i also have a fan in place for the external HDDs. My second guess would be power supply, but i have a 5A one connected to the hub, and it's only the seagate drives that disconnect.
Anyway, while using raspi-os still does not solve my problem it at least does not crash the USB controller.
Maybe ubuntu needs to update the raspi firmware or kernel to also get this behaviour?
Could be related but i have different symptoms. I can still reboot the pi and nothing hangs (except IO to the disconnected drives of course).
I have tried more things to debug this. It seems that on raspi-os with the same setup the USB controller does not crash but some seagate drives still disconnect randomly. They keep spinning up and disconnecting after that. Only fix is a reboot.
It also happens less frequently on USB2. I don't get why. Sound like a thermal issue to me, but i also have a fan in place for the external HDDs. My second guess would be power supply, but i have a 5A one connected to the hub, and it's only the seagate drives that disconnect.
Anyway, while using raspi-os still does not solve my problem it at least does not crash the USB controller.
Maybe ubuntu needs to update the raspi firmware or kernel to also get this behaviour?