On Wed, Jun 24, 2020 at 09:55:05AM -0000, Stuart Henderson wrote: > > > > Disable uftdi in your kernel config (boot -c, disable uftdi, quit) and > > see if that works. The device is attaching as a serial port, but libftdi > > probably wants it attaching to ugen. If that helps maybe we can add a > > quirk to knock out just this device. Send usbdevs -v output. Hi Stuart,
That's most helpful, thanks for the support. Unfortunately ... I fell at the first fence :(. After I enter 'boot -c' I get several lines of output followed by a prompt. But the cursor is flickering wildly and I can't enter any further input. At this point the first line, at the top of the screen, is an error: 'kbc: cmd word write error' (This is with boot version: BOOTX64 3.52) A quick search on the net didn't show much, apart from a suggestion that a USB keyboard won't work at this point because the USB subsystem hasn't yet been discovered (that was back in 2015 though). I'm using both a USB keyboard and mouse. Something is definitely faffing about with the USB bus though, every time I press a key at the flickering cursor, the LEDs in my mouse light up ... I'll try the ktrace approach instead. Thanks again. Cheers, Robb.