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Re: ACPI call for testing

On Nov 10, 2009, at 4:40 PM, Matthew Mondor wrote:

On Tue, 10 Nov 2009 22:49:30 +0100
Geert Hendrickx <> wrote:

may remember helping me debug the problem). It only works when disabling either one of MP, ehci, or acpi, and I have used the latter workaround for a long time now. Your patched kernel boots, although it seems much slower. Also keyboard repeats (when keeping a key presed) are much slower. This is
an USB keyboard connected via ehci.

Is the system performance really affected or is it a keyboard input
latency issue?  Also, does tweaking the software repeat rate allow you
to have a decent result (using wsconsctl for console and xset for X11)?

I have what may be a related problem on my Tyan K8WE system: An amd64 - current kernel with ACPI and MP (is disabling that even an option these days? I know it's not on i386; never checked on amd64) works fine. However, if I add ehci, it seems to work fine until I press a key on the PS/2 keyboard. Remotely ssh-ing in and doing things seems fine, a "systat vm" shows a usual amount of interrupts. However, once I press a key on the keyboard, the system gets incredibly slow. Even kernel output looks like I'm connected with a 300 baud modem. E.g., If I Ctrl-Alt-Esc to break into DDB, then do a "ps", I can see it output the characters one at a time. I have no idea what the interrupt rate is when it gets slow; it's slow enough that I can't log in on the console (maybe I could if I were willing to wait for a really long time), and a ssh session into the machine is effectively hung too.

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