ubuntu-x-swat team mailing list archive

[Tony Whitmore <tony@xxxxxxxxxxxxxxxxxx>]

Hi Bryce, sorry for the delay in responding, I've been on holiday!

I'm not sure why none of the files attached to the report the DPI as
29x39. This was the DPI reported by xdpyinfo when running X without the
DisplaySize hardcoded in xorg.conf or when X is started without the VGA
cable attached to the PC. I've not used the command line bug reporting
tool before. I was told to start X using the "broken" configuration and
then start X with a "working" default then run the ubuntu bug command
line tool. That's what I did, but I see that the xorg.conf and xdpyinfo
output attached to the report is the "working" version, not the "broken"
one.

I put a DisplaySize line in to xorg.conf, calculated as best I could
following the formula given on the ubuntu forums, which suited my 32"
TFT TV. This is a 16:9 display but I don't think the graphics card in
the MPC-L computer supports widescreen resolutions, so I was aiming to
run the display at 1280x1024. With this DisplaySize line in place, text
is rendered clearly. Without it, text is tiny on the screen.

Having looked at the wiki page you posted above it seems likely that it
is an EDID issue. The "Max Image Size" in the xorg log file is 10cm
bigger in both dimensioons than the visible screen size on the TV. I'm
not sure whether this is sufficiently incorrect to cause this error?

I have had this issue with Xubuntu and Openbox. Due to the very low spec
of the CPU in the MPC-L it is very slow running KDE or GNOME. However,
Openbox uses gdm AIUI and the issue is present there.

-- 
Incorrect autodetection of appropriate DPI
https://bugs.launchpad.net/bugs/394498
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