[issue2124] getty repeating too quickly on port /dev/ttyv0

Siju George sgeorge.ml at gmail.com
Wed Aug 31 21:28:06 PDT 2011

On Tue, Aug 30, 2011 at 10:18 PM, Matthew Dillon (via DragonFly issue
tracker) <bugs at crater.dragonflybsd.org> wrote:
> Matthew Dillon <dillon at apollo.backplane.com> added the comment:
> It looks like the USB driver is having trouble with the keyboard,
>    possibly an indication that the USB interrupt is not working.

I am using a PS2 keyboard now but has the same effect though in a
reduced intensity.
There are no messages in /var/log/messages how ever when I use the PS2 keyboard.

>    Try plugging the USB keyboard into a different USB port.
>    --

Changing ports does not work :-(

>    If that doesn't help, then emergency interrupt polling can be enabled
>    and you can try bumping the frequency up as a workaround.
>    sysctl kern.emergency_intr_enable=1
>    sysctl kern.emergency_intr_freq=50

I tried all these combinations and did not help :-(

blk-build# sysctl kern.emergency_intr_enable=1
kern.emergency_intr_enable: 0 -> 1
blk-build# sysctl kern.emergency_intr_freq=50
kern.emergency_intr_freq: 10 -> 50
blk-build# sysctl kern.emergency_intr_freq=100
kern.emergency_intr_freq: 50 -> 100
blk-build# sysctl kern.emergency_intr_freq=1000
kern.emergency_intr_freq: 100 -> 1000
blk-build# sysctl kern.emergency_intr_freq=5
kern.emergency_intr_freq: 1000 -> 5

Also I note that this problem exists only when I start Xorg before
that the system is just fine.
But once Xorg is started using  'startx' this problem surfaces and
persists in the console too even afterwards it is killed.
Only reboot solves the problem.



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