Re: USB devices fail unnecessarily on unpowered hubs

[Daniel Drake]

Andrew Morton wrote:
> (added linux-usb cc)
>
> Yes, it sounds like we're being non-real-worldly here.  This change
> apparently broke things.  Did it actually fix anything as well?

Gentoo recieved several reports of this. It appears that certain vendors 
are worse than others (Verbatim flash drives are a common culprit).

Some users tested and found that Windows has the same behaviour - it 
rejects these devices on unpowered hubs, and pops up a warning that not 
enough power is available.

I added a printk to point out when configurations are rejected due to 
power issues, this has been merged into Greg's tree. It's far from 
ideal, but better than silent failure...

Daniel
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/