Subject: kern/19333: Some USB->PS/2 adapters unusably slow?
To: None <gnats-bugs@gnats.netbsd.org>
From: seebs <seebs@vash.cel.plethora.net>
List: netbsd-bugs
Date: 12/09/2002 09:05:53
>Number: 19333
>Category: kern
>Synopsis: On some adapters, keypresses take about 1/4 second
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Dec 09 09:07:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: seebs
>Release: NetBSD 1.6K
>Organization:
>Environment:
System: NetBSD vash.cel.plethora.net 1.6K NetBSD 1.6K (VASH) #1: Mon Dec 9 08:50:42 CST 2002 seebs@vash.cel.plethora.net:/usr/src/sys/arch/i386/compile/VASH i386
Architecture: i386
Machine: i386
>Description:
I have a couple of USB keyboard adapters, which look like
ukbd0 at uhidev0 reportid 1
ukbd: imod=0 usage=0x700e0 flags=0x2 pos=0 size=1 cnt=1
wskbd1 at ukbd0 mux 1
ukbd1 at uhidev1
ukbd: imod=0 usage=0x700e0 flags=0x2 pos=0 size=1 cnt=1
wskbd2 at ukbd1 mux 1
The first one is built into a multifunction hub; the second is a
standalone adapter.
The first one consistently takes about 1/4 second to process a key
press; the second has normal responsiveness.
Experimenting, I have found that the press and release interrupts
seem to be coming in a slow but regular stream from the first
device, but working fine on the second.
More interestingly, I have two hubs which exhibit exactly the same
behavior:
1. Keyboard interrupts are unusably slow.
2. Mouse interrupts are fine.
3. The USB ports on the hub are totally silent; plugging devices
into them has no effect.
One is a D-Link hub, the other is a "QVS" hub. Both have serial
ports (uftdi), keyboard, mouse, and other USB ports. One also has
an ethernet and parallel port controller.
>How-To-Repeat:
Plug one of these hubs in.
>Fix:
None figured out. I know that both of these devices were known
to work a couple of months ago, and I think this is probably a hub
driver problem, not a keyboard driver problem. I'm still poking
around at it.
>Release-Note:
>Audit-Trail:
>Unformatted: