Xorg Mach64 DPMS: invalid scan freq

[Rick Voland]

I have Xorg working fine during normal use, but I get a warning message 
"Invalid scan freq" on the monitor as the video system approaches DPMS 
power down mode.  This problem has been mild and only occasional with 
recent versions of Xorg, but is very noticeable in the latest version 
(xorg-server-6.8.2_6).

The system is fine during full power mode and during the initial 
blanking of the screen which starts after 10 minutes of no activity. 
The warnings occur after the simple screen blanking and before the 
actual DPMS power down.  In the past, the system successfully reached a 
DPMS lower power mode even after these warnings, but I am reluctant to 
test it now that the warnings are prolonged.

$ uname -a
FreeBSD brian.local.bsd 5.4-RELEASE-p8 FreeBSD 5.4-RELEASE-p8 #0: Fri 
Oct 14 04:50:42 CDT 2005 
root at brian.local.bsd:/usr/obj/usr/src/sys/BRIAN  i386

xorg-server-6.8.2_6
xorg-libraries-6.8.2

video card:  ATI Xpert98 PCI
monitor:  Hitachi 813

--------------/usr/X11R6/etc/xorg.conf

Section "ServerLayout"
	Identifier     "XFree86 Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
	RgbPath      "/usr/X11R6/lib/X11/rgb"
	ModulePath   "/usr/X11R6/lib/modules"
	FontPath     "/usr/X11R6/lib/X11/fonts/misc/"
	FontPath     "/usr/X11R6/lib/X11/fonts/Speedo/"
	FontPath     "/usr/X11R6/lib/X11/fonts/Type1/"
	FontPath     "/usr/X11R6/lib/X11/fonts/75dpi/"
	FontPath     "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection

Section "Module"
	Load  "extmod"
	Load  "xie"
	Load  "pex5"
	Load  "glx"
	Load  "dri"
	Load  "dbe"
	Load  "record"
	Load  "xtrap"
	Load  "speedo"
	Load  "type1"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "keyboard"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "MouseSystems"
	Option	    "Device" "/dev/sysmouse"
EndSection

Section "Monitor"
	#DisplaySize	  400   300	# mm
	Identifier   "Monitor0"
	VendorName   "HTC"
	ModelName    "CM813"
	Option	     "DPMS"
	HorizSync    31-115
	VertRefresh  50-85
EndSection

Section "Device"
         ### Available Driver options are:-
         ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
         ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
         ### [arg]: arg optional
         #Option     "accel"              	# [<bool>]
         #Option     "crt_screen"         	# [<bool>]
         #Option     "composite_sync"     	# [<bool>]
         #Option     "hw_cursor"          	# [<bool>]
         #Option     "linear"             	# [<bool>]
         #Option     "mmio_cache"         	# [<bool>]
         #Option     "probe_clocks"       	# [<bool>]
         #Option     "reference_clock"    	# <freq>
         #Option     "shadow_fb"          	# [<bool>]
         #Option     "sw_cursor"          	# [<bool>]
	Identifier  "Card0"
	Driver      "ati"
	VendorName  "ATI"
	BoardName   "Mach64 GP"
	ChipSet     "ati"
	ChipId      0x4750
	ChipRev     0x5c
	BusID       "PCI:0:18:0"
	Option "NoCompositeSync"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	DefaultColorDepth 24
	SubSection "Display"
		Depth	24
		Modes	"1280x1024"
	EndSubSection
	SubSection "Display"
		Depth     4
	EndSubSection
	SubSection "Display"
		Depth     8
	EndSubSection
	SubSection "Display"
		Depth     15
	EndSubSection
	SubSection "Display"
		Depth     16
	EndSubSection
	SubSection "Display"
		Depth     24
	EndSubSection
EndSection

-------------------------------

Thanks for any suggestions.


-- 

Rick Voland
rpvoland at spamcop.net