amd64/162489: After some time X blanks the screen and does not respone to mouse or keyboard

[Thomas Dean]

>Number:         162489
>Category:       amd64
>Synopsis:       After some time X blanks the screen and does not respone to mouse or keyboard
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Nov 11 19:10:05 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Thomas Dean
>Release:        8.2 AMD64
>Organization:
Home
>Environment:
FreeBSD Envy.tddhome 8.2-STABLE FreeBSD 8.2-STABLE #3: Mon Oct 24 11:38:59 PDT 2011     tomdean at Envy.tddhome:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
HP Envy 17 3d Laptop

After some time, and after dpms blanks the screen, the system becomes non-responsive to the keyboard and mouse.  Moving the mouse or pressing keys
does not wake the display.

I can log in from a remote system and things seem normal, however, X is disconnected.

as root:

xset q
No protocol specified
No protocol specified
No protocol specified
No protocol specified
xset:  unable to open display "192.168.2.3:0.0"

dbus and hald are running.  Restarting either or both does not effect things.

A process that was running before seems to accumulate CPU time - top shows increasing numbers.
Xorg seems to not be using CPU time.

======================================
dmesg has lots of error messages like

ACPI Error: Method parse/execution failed [\\_SB_.WMID.HWMC] (Node 0xffffff00024e9100), AE_AML_BUFFER_LIMIT (20101013/psparse-633)
ACPI Error: Method parse/execution failed [\\_SB_.WMID.WMAD] (Node 0xffffff00024ecd40), AE_AML_BUFFER_LIMIT (20101013/psparse-633)
ACPI Error: Field [D128] at 1040 exceeds Buffer [NULL] size 160 (bits) (20101013/dsopcode-697)

======================================
var/log/messages has many entries like

Nov  9 19:12:07 Envy kernel: ACPI Error: Field [D128] at 1040 exceeds Buffer [NULL] size 160 (bits) (20101013/dsopcode-697)
Nov  9 19:12:07 Envy kernel: ACPI Error: Method parse/execution failed [\_SB_.WMID.HWMC] (Node 0xffffff00024e9100), AE_AML_BUFFER_LIMIT (20101013/psparse-633)
Nov  9 19:12:07 Envy kernel: ACPI Error: Method parse/execution failed [\_SB_.WMID.WMAD] (Node 0xffffff00024ecd40), AE_AML_BUFFER_LIMIT (20101013/psparse-633)
Nov  9 19:12:07 Envy kernel: ACPI Error: Field [D128] at 1040 exceeds Buffer [NULL] size 160 (bits) (20101013/dsopcode-697)

Nov 10 11:56:34 Envy kernel: acpi_tz0: _CRT value is absurd, ignored (-273.2C)
Nov 10 11:58:58 Envy kernel: acpi_tz0: _CRT value is absurd, ignored (-273.2C)




>How-To-Repeat:
1 Boot
2 login and startx
3 xset dpms 300 0 0  ## I have tried various combinations
4 wait until the screen blanks
5 move the mouse and/or press keys
6 If the system wakes up, go to 4

After some time, maybe overnight, the system will fail to respond to 5.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: