X fails on YDL4 clean install

[Nigel Horne]

X fails to start on YDL4 on a Powerbook G4. YDL2.2/2.3/3 were all OK.
This is a clean installation, not an update.

The worrying section from /etc/X11/XF86Config is:

Section "Device"

        #Option "ShadowFB"      "true"
        #Option "fbdev" "/dev/fb0"
        #BusID  "0:0:0"
        Identifier  "Card0"
        Driver      "fbdev"
        BoardName   "Unknown video card"
        Option      "UseFBDev" "true"
EndSection

From /var/log/XFree86.0.log:
II) Loading sub module "fb"
(II) LoadModule: "fb"
(II) Loading /usr/X11R6/lib/modules/libfb.a
(II) Module fb: vendor="The XFree86 Project"
        compiled for 4.3.99.902, module version = 1.0.0
        ABI class: XFree86 ANSI C Emulation, version 0.2
(**) FBDEV(0): Using "Shadow Framebuffer"
(II) Loading sub module "shadow"
(II) LoadModule: "shadow"
(II) Loading /usr/X11R6/lib/modules/libshadow.a
(II) Module shadow: vendor="The XFree86 Project"
        compiled for 4.3.99.902, module version = 1.0.0
        ABI class: XFree86 ANSI C Emulation, version 0.2
(==) Depth 24 pixmap format is 32 bpp
(EE) FBDEV(0): FBIOPUT_VSCREENINFO: Invalid argument
(EE) FBDEV(0): Mode init failed

-Nigel


-- 
Nigel Horne. Arranger, Composer, Typesetter.
NJH Music, Barnsley, UK.  ICQ#20252325
njh at despammed.com http://www.bandsman.co.uk