[FreeNX-kNX] Screen Re-Draw Problem

[Reto Buerki]

actually the screen is not all black. The background is there, only the
icons and panels are missing or are not drawn properly; and there are
some strange stripes sometimes. when I move the mouse over the panels,
the icons re-appear. and after a few seconds (depends on the user
activity with keyboard and mouse), the screen looks OK again. no
activity -> no screen re-drawing

when I call xrefresh, the screen gets re-drawn immediately and looks ok!
what could be the reason why this is not happening after switching back
from a terminal?

Revellion wrote:
> tried to run "xrefresh" when its all black in the nx window?
> 
> 2007/1/31, Reto Buerki <buerki at swiss-it.ch>:
>>
>> nobody has a clue what could possibly be the problem? I tested the whole
>>   scenario again with the new release of freenx  (thanks for the great
>> work!!!!) and it's exactly the same. so the problem must be on the
>> client side...
>>
>> any help or hints are much appreciated!
>>
>> Reto Buerki wrote:
>> > Hi list
>> >
>> > I have a specific question about how screen redrawing is handled by NX
>> > (or Xserver in general).
>> >
>> > The actual problem that we have is that the screen is not properly
>> > re-freshed on the client after switching to a text console and back.
>> The
>> > user has to actually move the mouse around to make the screen refresh
>> > itself ...
>> >
>> > we use the !M nxclient 2.1 and nxserver 2.1. The nxclient and it's
>> > associated Xserver is running in a special jail. the Xserver is 
>> patched
>> > and runs as non-root. the nxserver is normally installed on a debian
>> > testing machine.
>> >
>> > The same combination works great when the client is started "normally",
>> > let's say from an ubuntu workstation. So the problem must be the
>> > hardened jail...
>> >
>> > Could someone explain how screen refreshing works? I need to understand
>> > the theory behind it so that I can solve our problem. Or does someone
>> > have an idea what could be the cause of this behavior? How or when is
>> > the screen re-drawing triggered?
>> >
>> > Many thanks in advance
>> > - reto
>> >