[TriLUG] KVM & mouse problems

Douglas Kojetin djkojeti at unity.ncsu.edu
Sun Dec 7 16:15:22 EST 2003


I'll give the 'PS/2' flag a try, but do you know if by setting this I 
will be able to use the scroll wheel as the 'third button'?  I do not 
care so much about scrolling capability, but would like to be able to 
paste using the 'click' of the scroll button.

Thanks,
Doug


On Dec 7, 2003, at 3:57 PM, Scott Chilcote wrote:

> Hello Doug,
>
> I have seen this problem with my Belkin KVM, but only when I use 
> Option Protocol "IMPS/2" to enable the mouse wheel.  The problem has 
> not occurred when I use "PS/2" instead, but then there's no mouse 
> wheel input.  If you don't need mouse wheel support this might be your 
> answer.
>
> I have never seen a complete cure for this problem other than using 
> another brand of KVM.
>
> A workaround is to switch away from X to a virtual console (Alt-F1) 
> and then back again (Alt-F7).   This cleans it up until the next time 
> you have to switch away and return.
>
> My other fix was to start using VNC instead of KVM for display control 
> flexibility.  There are a number of interesting add-ons for VNC that 
> allow it to do a variety of useful display control operations:
>
>    http://www.uk.research.att.com/archive/vnc/extras.html
>
> One option is to use a display-only switch to flip between video 
> outputs.  A virtual display can provide the mouse/keyboard control 
> while you view the system directly.
>
> This has worked well for me in a single user environment with multiple 
> machines, but would take some creativity to scale into a multi-user 
> environment.
>
> Let me know if you find a direct fix for the Belkin problem, thanks.
>
>     Scott
>
> Douglas Kojetin wrote:
>
>> Hi All-
>> I'm experiencing erratic mouse behavior w/ my Belkin KVM switch under 
>> the console (and X as well, but I am rarely in it).  If I switch back 
>> and forth between channels more than once, the mouse cursor goes 
>> crazy.  The only real solution I've found is to restart 'gpm' 
>> (service gpm restart), which is OK, but not all my users have access 
>> to that command.  (I experienced it before, a long time ago, but I'm 
>> just now getting around to it again -- since it's quite annoying).
>> I did find this page on the Belkin homepage:
>> http://web.belkin.com/support/faq_qa.asp?pid=190&cid=
>> I tried setting everything in my XF86Config file to /dev/mouse, but 
>> that did not work (I guess it makes sense, since I'm working under 
>> the console and that governs X).
>> Anyone else have any suggestions, other than just shutting down mouse 
>> services all together?
>> Also, one other random question.  The mouse cursor under the console 
>> is a white block w/ some sort of accented 'G', which seems to change 
>> to some other characters when I move over a character on the screen.  
>> Any means of changing this?
>> Many thanks,
>> Doug




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