Re: kernel: psmintr: out of sync

[Christoph Sold]

Alex Wilkinson wrote:
Hi all,

I am switching between several OS's with a Cybex KVW switch.
I now seem to have a problem with my mouse (after build world/kernel).
FreeBSD 5.1-CURRENT #2: Wed Aug 20 13:28:54 CST 2003
I am getting these messages on the console when I move my mouse, the cursor moves in a 
very
choppy motion (painfully slow).
Oct  1 09:46:17 squirm kernel: psmintr: out of sync (0000 != 0008).
Oct  1 09:46:17 squirm kernel: psmintr: discard a byte (1).
Oct  1 09:46:17 squirm kernel: psmintr: out of sync (0000 != 0008).
Oct  1 09:46:17 squirm kernel: psmintr: discard a byte (2).
Oct  1 09:46:18 squirm kernel: psmintr: out of sync (0000 != 0008).
Oct  1 09:46:18 squirm kernel: psmintr: discard a byte (3).
Oct  1 09:46:18 squirm kernel: psmintr: out of sync (0000 != 0008).
Oct  1 09:46:18 squirm kernel: psmintr: re-enable the mouse.
Oct  1 09:46:18 squirm kernel: psm: DISABLE_DEV return code:00fa
Oct  1 09:46:18 squirm kernel: psm: ENABLE_DEV return code:00fa
Oct  1 09:46:20 squirm kernel: psmintr: out of sync (0000 != 0008).
[snip]

Switching the KVM while the mouse is sending data can cause this 
behaviour. Better KVMs interpret the data sent by the mouse and delay 
switches until a complete mouse output has been sent to the computer.

HTH
-Christoph Sold
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