cmbat hangs

[Nate Lawson]

Maxim Maximov wrote:
> Hello.
> 
>     I've got a problem with acpi_cmbat device. Specifically, Mar 31 
> kernel hangs at boot after 'Preseeding PRNG:'. DDB shows that 'sysctl' 
> proc hangs in [cmbat] status. After setting debug.acpi.disabled="cmbat" 
> the problem disappeared.
>     Mar 25 dated kernel doesn't have this problem. I'm working on ASUS 
> L5 (w/HTT). Here's ACPI related strings from dmesg (cmbat disabled). I 
> can provide any information by request. Should I file a PR?
> 
> 
> acpi0: <A M I OEMRSDT> on motherboard
> acpi0: Power Button (fixed)
> acpi_ec0: <Embedded Controller: GPE 0x1c> port 0x62,0x66 on acpi0
> acpi_ec0: can't allocate data port
> device_attach: acpi_ec0 attach returned 6

This would be the issue.  If your EC can't attach, cmbat reads will time 
out.  Can you send the output of devinfo -rv with the broken kernel?  We 
need to figure out who's stealing the data port.


-- 
Nate