Bug 3714

i have an eMac PowerPC 700Mhz with a builtin monitor.

it's running Ubuntu GNU/Linux 5.04 (Hoary Hedgehog), with xserver-xorg version
6.8.2-10

the text console (non-X11) works exactly as expected.  the machine boots to
display the text console on the builtin monitor.

By default, the X.org xserver chooses the external monitor port rather than the
builtin monitor.  with the external monitor port, things work as expected, with
24-bit color, and whatever resolution the external monitor supports.  In this
default case, the builtin monitor goes completely blank.

When i force the X.org xserver to use the builtin monitor (with Option
"CrtcNumber" "1"), i can coax some form of graphics to the builtin display, but
it seems to be getting things massively wrong.  in particular:

i think the computer feeds the video data to the card as whatever bitdepth you
specify, but the card seems to be stuck only displaying 8bit video at 1024x768
resolution to the builtin monitor.  That is, from a software point-of-view,
everything seems to be working just fine, using higher bit-depths and
resolutions, but the actual monitor is being fed with data as though it were all
8-bit, 1024x768.  So, for example, if you specify 24bpp, you get the image
smeared out along the screen both horizontally and vertically.  Or if you
specify a higher resolution, a similar effect happens.  The monitor is only
getting the data from the first (8*1024*768) bytes of the frame buffer, even
though the display manager (or other X11 clients) are presented with a nice,
high-res, high-bitdepth X11 environment.

i've verified this by experimenting with a range of different bitdepths and
resolutions.

i'm happy to take photos of the screens or do any recompiling or debugging
requested to help resolve this problem.  Just let me know!  i've actually got a
lab full of these machines which i'd love to be able to run X.org on.

(i'm also experiencing the same problem as reported in bug 3009 where i need to
force HWCursor to "off" to get a mouse cursor to display on the builtin monitor.
 That tweak doesn't seem to be needed for proper cursor display on the external
monitor, however.)