Re: [solved] Re: USB device not seen by grub

[Chris Jones]

On Fri, Dec 04, 2009 at 09:58:23PM EST, address@hidden wrote:
> On Fri, Dec 4, 2009 at 8:26 PM, Chris Jones <address@hidden> wrote:

[..]

> > Why do I have to enable tracing to make it work?
> 
> Yesterday Vladimir wrote:
> 
> (quote)
> There is an issue that somewhere grub misses a delay between uhci
> commands. When enabling debug=all this hang goes away. My laptop has
> this issue too. I hope to have time soon to fix it
> (/quote)

> This makes a lot of sense, the UHCI controller may require some time
> for processing certain commands before it can accept the next one, and
> tracing slows things down enough to let the controller catch up.  It's
> a very good sign (for having a fix soon) that one of the major
> programmers has not only reproduced the problem but is affected by it.

Thanks for reminding me.

CJ