[ltp] resolutions on 770z

[Geert Janssen]

I am suffering from the same problems as Chris:
Can't get any other screen resolutions than 1024x768 on the TP770Z
(running RH 6.0 2.2.10 kernel).
Did quite a bit of fiddling in XF86Config. Tried with and without "vesafb".
Also tried the XF86_FBDev server in combination with vesafb.
I can switch to say 800x600 or 640x480 but then the screen simply blanks
(= turns black). Am using the regular modeline settings as in Bill Mair's
XF86Config for the 770Z.

Section "Monitor"
	Identifier	"TP770Z_LCD_1024x768"
	VendorName	"IBM"
	ModelName	"TP770Z (14.1)"
	HorizSync	31.5-82.0
	VertRefresh	40-150
# 640x480 @ 60 Hz, 31.5 kHz hsync
	Modeline   "640x480"     25.175 640  664  760  800   480  491  493  525
# 640x480 @ 72 Hz, 36.5 kHz hsync
	Modeline   "640x480"     31.5   640  680  720  864   480  488  491  521
# 640x480 @ ? Hz, ? kHz hsync
	Modeline   "640x480"     36.0   640  696  752  832   480  481  484  509 -hsync -vsync
# 800x600 @ 56 Hz, 35.15 kHz hsync
	ModeLine   "800x600"     36     800  824  896 1024   600  601  603  625
# 800x600 @ 60 Hz, 37.8 kHz hsync
	Modeline   "800x600"     40     800  840  968 1056   600  601  605  628 -hsync -vsync
# 800x600 @ 72 Hz, 48.0 kHz hsync
	Modeline   "800x600"     50     800  856  976 1040   600  637  643  666 -hsync -vsync
# 800x600 @ ? Hz, ? kHz hsync
	Modeline   "800x600"     60.75  800  864  928 1088   600  616  621  657 -hsync -vsync
# 1024x768 @ 60 Hz, 48.4 kHz hsync
	Modeline  "1024x768"     65    1024 1032 1176 1344   768  771  777  806 -hsync -vsync
	Modeline  "1024x768"     75    1024 1048 1184 1328   768  771  777  806 -hsync -vsync
# Gives shadowy stripes at 32bpp:
#	Modeline  "1024x768"     85    1024 1032 1152 1360   768  784  787  823
EndSection

X Server doesn't complain and does recognize the modes:

(**) SVGA: Option "accel"
(**) SVGA: Option "power_saver"
(**) SVGA: Using 32 bpp, Depth 24, Color weight: 888
(--) SVGA: Maximum allowed dot-clock: 115.000 MHz
(**) SVGA: Mode "1024x768": mode clock =  75.000
(**) SVGA: Mode "800x600": mode clock =  60.750
(**) SVGA: Mode "640x480": mode clock =  36.000
(**) SVGA: Virtual resolution set to 1024x768
(--) SVGA: Using Linear Frame Buffer at 0x070800000, Size 4MB

Can't use anything else but 32 bpp color depth otherwise even 1024x768
doesn't work.

Anyone any suggestions?

Geert
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