Re: [9fans] 9front kernel panic on bootstrap on rpi

[ori@eigenstate.org]

> Hi folks,
> After the mice problems I have on my rpi2 with 9front [1], I
> decided to check if I can have an instance working on another
> machine, i.e. an old rpi model A. I cannot get through the
> boostrap process, the kernel panics.

Thanks for the reports. Two things:

0) It's going to be very hard to debug this if you don't have
   a way to rebuild the software for testing. Getting net boot
   working (even from a VM) would make it much easier.

1) You're likely to get better results on the 9front mailing
   list. (9front@9front.org)

Unfortunately, I have neither version of the rasperry pi,
and the mouse model you have doens't seem to be available
on Amazon any more, so I can't even try it out on the PC
on my end.

> I can provide more context and information, but first I
> wanted to ask: am I picking a broken image?

cpu% sha1sum 9front.pi.img
ffb9f6569c7c239a58f0e6e508aac9d2418333af	9front.pi.img

> [2] Again,  as for the mice problme, the legacy miller
> version works like a charm even on this rpi!

From what I understand, the difference there is that 9front
will parse the HID descriptor, while 9legacy will hardcode
the boot protocol. There are a number of places that this can
be going wrong -- from bad HID descriptors to power brownouts
to USB bugs.

As far as booting: A picture of the panic message would help.

As far as the mouse: First question -- does it work if you
plug it into a PC? (You can test with a USB stick). If it
fails there, then it's likely a problem with HID parsing.

Second question: Does it work with a powered USB hub? If
yes, then it's likely to be the Pi's power limitations.

Third question: Does it work with a different mouse?

If not, then it'll take more work to investigate.