Re: problem with usb duo mouse and keyboard

[Vojtech Pavlik]

On Sun, Dec 21, 2003 at 03:43:31PM -0500, Raul Miller wrote:
> Linux 2.6.0 (and 2.6.0-test11) appears to have a significant problem
> with the mouse of the logitech 700mx duo when it's plugged in using usb.
> 
> The mouse works fine* when plugged in using the ps/2 mouse connector,
> and the keyboard works ok even when plugged in using usb.  However,
> when using usb:
> 
> o   horizontal mouse movement is interpreted as vertical movement 
> o   vertical mouse movement is ignored 
> o   strange things happen with mouse button presses (I didn't bother
>     working with this configuration long enough to figure out the
>     details).
> 
> This occurs under both x and gpm, which is mild evidence that it's
> not a user space problem.
> 
> It might also be worth noting that some of the extra keys on the keyboard
> do odd mouse-like things (like move the mouse's pointer horizontally
> a short distance) when it's a usb keyboard.  However, these keys work
> reasonably normally (or, in two cases**, generate entries in syslog)
> when it's plugged in as a ps/2 keyboard.
> 
> My guess is that the respective usb drivers haven't taken into account
> that both a keyboard and a mouse might appear on the same physical
> connection.  [But I'm still coming up to speed, and haven't yet figured
> out how to confirm/disprove that guess.]

They do take that into account. It's just that the descriptors are maybe
too complex. Could you possibly enable DEBUG in hid-core.c and send me
the output?

> -- 
> Raul Miller
> moth@xxxxxxxxxxx
> 
> 
> * one mouse button is ignored, however it is so awkwardly placed that I
> doubt anyone would want to use it.
> 
> 
> ** the syslog entries from the unsupported keys:
> 
> Dec 21 15:28:07 localhost kernel: atkbd.c: Unknown key pressed (translated set 2, code 0x11d, data 0x11, on isa0060/serio0).
> Dec 21 15:28:07 localhost kernel: atkbd.c: Unknown key released (translated set
> 2, code 0x11d, data 0x91, on isa0060/serio0).
> Dec 21 15:28:10 localhost kernel: atkbd.c: Unknown key pressed (translated set 2, code 0x12c, data 0x14, on isa0060/serio0).
> Dec 21 15:28:10 localhost kernel: atkbd.c: Unknown key released (translated set
> 2, code 0x12c, data 0x94, on isa0060/serio0).
> 
> Perhaps it's also worth noting that most of the other extra keys send two
> byte sequences when pressed (as reported by showkey -s), and showkey -k
> seems to be reporting the extra information as extra key releases, I think
> I've seen something similar on other keyboards, but I don't have one of
> those handy to test on).  If anyone cares, I can document this for them.
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-- 
Vojtech Pavlik
SuSE Labs, SuSE CR
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