Re: Kernel 2.6.x mouse and KVM help needed
From: Johan Kullstam (kullstj-nn_at_comcast.net)
Date: 01/29/04
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Date: 29 Jan 2004 10:08:50 -0500
Andi Kleen <freitag@alancoxonachip.com> writes:
> Kris Sanders <kris@solanix.org> writes:
>
> > I have just recently upgraded to kernel 2.6.1 using Slackware 9.1 with
> > pretty much all the current updates. I have found that when I am in X
> > Windows and switch to a different box and then back that I lose control of
> > the pointer. I had this problem with XFree 3.3.x and when 4.x.x came out
> > they added a reinit routine. That solved the problem that time. The temp
> > fix that I had was to switch to a console and then back.
>
> The 2.6 in kernel mouse driver is to blame whose auto detection
> tries to be too clever for some KVMs.
>
> In 2.6.0 you can pass "psmouse_noext" on the kernel command line to disable
> that. On 2.6.1 it is "psmouse_base.psmouse_noext"
> In 2.6.2 it will be apparently "psmouse.max_proto=bare"
Is there a similar kernel command line incantation for keyboards?
I have a similar problem with a Linksys 2-Port KVM (PS2KVM2). Linux
2.6 keyboard serial driver i8042 doesn't detect my keyboard. I have
to plug in a keyboard directly to the PS/2 port. After sacrificing
this goat, linux finds the keyboard and I can hot-swap in the KVM
again. Everything is fine after that. Since I don't reboot all that
often it's not *that* big a deal but it is annoying.
Another wacky data point is that with newer kernels or X (since later
linux 2.4 or xfree86 4.2 I think) the mouse wheel now works through
the above mentioned KVM.
I have an older Linksys at home (for which there is no keyboard hotkey
to switch KVM) which has no problems at all. Curiouser and curiouser.
> Yes, you have to reboot to change the mouse settings. It's not a joke,
> even though it looks like one. I find it sad too.
Is this a job for something in /proc/sys? Is there some consensus
about how to fix this?
> With some luck at least the command line argument will settle in 2.6.2,
> although I am not very optimistic given past experiences.
Sigh. Thanks.
> -Andi
-- Johan KULLSTAM <kullstj-nn@comcast.net> sysengr
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