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/  Forum Index
   /  Amiga OS4 Hardware
      /  OS4 boots without startup-sequence with KVM USB plugged in (SOLVED!)
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Shadowolf 
Re: OS4 boots without startup-sequence with KVM USB plugged in
Posted on 20-Dec-2008 18:43:55
#21 ]
Regular Member
Joined: 22-Mar-2005
Posts: 137
From: Germany

My PS/2 KVM shows the same problem.
Booting without startup-sequence.

So I added some debug-output and found out that
my KVM is indeed the problem since it sends mouse-data
that is not correct.

Bootmenu gets data that shows that the middle-mouse button is
pressed while it is not because the KVM sends some junk due
to an apparently not or not correctly implemented PS/2 command.

So I changed that command to an alternative method of getting
the button-status and then ran into the problem that the KVM
at first identifies itself as supporting four-byte protocoll and a couple
of seconds later falls back to three-byte protocoll.

I do not have the slightest idea why it works with W$N.
Maybe the W$N driver already includes quite some workarounds for crappy KVMs like that.

I am using a dedicated mouse for my A1 now.

Since the SAM440 does only have USB I tried a PS/2 to USB converter with both mouse and keyboard.
Well, it does not work at all with my KVM.

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ChrisH 
Re: OS4 boots without startup-sequence with KVM USB plugged in
Posted on 14-Sep-2009 10:47:53
#22 ]
Elite Member
Joined: 30-Jan-2005
Posts: 6679
From: Unknown

For reason I am not completely sure of, my StarTech KVM has started misbehaving (as it sometimes used to) where a soft-reboot of OS4 would loose my USB keyboard & mouse (and the Computer indicator light on the KVM stays flashing when this happens).

As this had happened after taking my Sam440 away (I left the KVM at home), and some additional cables accidentally coming unplugged from my KVM, I thought it must have something to do with how the KVM was plugged in.

Last edited by ChrisH on 14-Sep-2009 at 11:27 AM.
Last edited by ChrisH on 14-Sep-2009 at 11:10 AM.

_________________
Author of the PortablE programming language.
It is pitch black. You are likely to be eaten by a grue...

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ChrisH 
Re: OS4 boots without startup-sequence with KVM USB plugged in
Posted on 14-Sep-2009 11:30:18
#23 ]
Elite Member
Joined: 30-Jan-2005
Posts: 6679
From: Unknown

OK, I have found three (!) solutions:
1. Plug the KVM into my Sam440's top USB port (the bottom one is no good), or
2. Have the KVM plugged into the mains, or
3. Have my Windows PC switched on.

This leads me to conclude that at least on my Sam440, the bottom USB port does not supply quite enough power.

_________________
Author of the PortablE programming language.
It is pitch black. You are likely to be eaten by a grue...

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