RELENG_7 jerky mouse and skipping sound

[Anish Mistry]

I just updated to RELENG_7 from 6.2 and I'm running into some really 
annoying issues with jerky mouse movement and skipping sound.  This 
seems to be similar to:
Re: SCHED_4BSD in RELENG_7 disturbs workflow
This happens both with 4BSD and ULE.

I seems to happen when I'm compiling ports and a new cc/bzip2/sh 
process fires off (I'm just watching top), I'll get the 
skip/freezeup.

This behavior is pretty pronounced, as I'm installing gutenprint right 
now.

bigguy# sysctl hw.acpi
hw.acpi.supported_sleep_state: S1 S3 S4 S5
hw.acpi.power_button_state: S5
hw.acpi.sleep_button_state: S1
hw.acpi.lid_switch_state: S3
hw.acpi.standby_state: S1
hw.acpi.suspend_state: S3
hw.acpi.sleep_delay: 5
hw.acpi.s4bios: 0
hw.acpi.verbose: 1
hw.acpi.disable_on_reboot: 0
hw.acpi.handle_reboot: 0
hw.acpi.reset_video: 0
hw.acpi.cpu.cx_lowest: C1
bigguy# sysctl dev.cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU1
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.cx_supported: C1/0
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00%

This didn't happen with 6.2.  I'm running UP with Xorg 7.2.
http://am-productions.biz/debug/releng_7/BIGGUY
http://am-productions.biz/debug/releng_7/vmstat-i.txt
http://am-productions.biz/debug/releng_7/dmesg.boot
http://am-productions.biz/debug/releng_7/pkg_into.txt

Let me know what other information I need to provide.
-- 
Anish Mistry
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