I'm reopening this as I think this problem has persisted ever since. It
has for me at least. On my Ubuntu 7.04 (Feisty Fawn) install the login
background and the desktop background are both clearly banded.
If the problem is that LCD screens don't have enough color depth to make
the background and fade look good, then the solution would be to dither
the color crossovers. I have attached some examples in PNG format. I've
used the login screen background as that's not generally user
configured.
* login-now.png - how the login screen looks on my laptop now
* login-spreadx3 - the current screen after three passes of the Gimp filter
'Filters > Noise> Spread'
* login-scatter(RGB).png - the current screen after the filter 'Filters > Noise
> Scatter RGB'
* login-scatter(HSV)x2.png - the current screen after 2 passes of 'Filters >
Noise > Scatter HSV'
The scattered versions look much better on my screen than the original.
** Changed in: ubuntu-artwork (Ubuntu)
Status: Fix Released => Unconfirmed
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GDM's default field of brown does not render so well on large LCD monitors
https://launchpad.net/bugs/17561
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