Public bug reported:
When trying to boot xubuntu 24.04 or 25.04 desktop installer, system
fails to boot. During boot process, the system hangs, with the screen
filled with 'stdin: invalid argument' followed by 'Unable to find a
medium containing the live filesystem'. The keyboard also stops working
at this point, and I cannot get kernel logs.
I was able to track down the issue to the USB port for the flash drive
being attached via a Renesas uPD720201 USB3 controller. This particular
mini PC uses this controller for all of the USB-A ports.
Ubuntu 20.04 live installer is able to boot successfully and does
function, and dmesg reports it was unable to load firmware to the
Renesas IC. It's using xhci_hcd driver only. USB does not work very well
in this case, as some USB devices do not work properly.
Alpine does not have any issues and loads xhci-pci-renesas and firmware
successfully in the live system.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2125621
Title:
Installer hangs when booted from uPD720202 USB controller
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