[ltp] missing colors under X on TP X40

Richard Neill linux-thinkpad@linux-thinkpad.org
Tue, 03 Jan 2006 23:39:07 +0000


Norman Ramsey wrote:
> My Thinkpad X40 seems set up to use fewer colors than expected on X.
> In particular, it doesn't display pastel colors well.  This is a real
> problem for applications like gnucash, where all the striping is just lost.
> I'm using the Xorg X server with the i810 driver and a default
> depth of 24 bits per pixel.  Is this problem just inherent to the X40
> hardware, and if not, what driver settings should I try?

Have you tried 16 bit/pixel - just out of curiosity?

Also, have you tried adjusting the gamma for the LCD panel? (You can do
this within kcontrol->peripherals->display).  There will be an xorg
setting somewhere if you don't want to use KDE.

If you view a digital photo in the GIMP, and change the
brightness/contrast/gamma, you should be able to determine whether
   i)You have the wrong levels or colour-curves
or
   ii)Some colors cannot be shown at all.

I've observed a similar problem on a desktop system which is dual-head,
with 2 identical LCD monitors, one connected with DVI and the other by a
VGA connector. The VGA-connected monitor has horrid colour definition.

Lastly, try knoppix: it will give you a quick data-point, and help you
eliminate anything that might be specific to your software setup.

Richard