[daip] AIPS interaction with Linux graphics question

[Eric Greisen]

Samuel Conner writes:
 > To Whom it may concern,
 > 
 >   I am running 31DEC04 on a HP zd7000 laptop with a wide-aspect display (1680x1050). My OS is Red Hat Enterprise Linux for Workstations.
 > 
 >   Until this week, I was using the generic "nv" driver to run my  graphics, and while this limited my screen to 1400x1050, the x/y aspect of everything within AIPS was fine. In order to get external video/projector capability, I had to install the nvidia driver, and this now gives me the full 1680 width. But there is a drawback. The additional width is achieved not by adding physical resolution elements, but by stretching the x dimension of the image. This is quite apparent in IMAGR, where the circular clean boxes are now ovals.
 > 
 >  Question: Is there a way to adjust my AIPS graphics code to counteract this stretching in the x direction, or am I obliged to fix it at the level of Linux? I recognize that the latter is preferable, but I have even less confidence in my Linux hacking skills than my AIPS skills. Any advice on either route would be welcome.
 > 

AIPS does assume that the pixels on the screen are square.  Apparently
with your new driver they are not.  This is a Linux-level issue.

Eric Greisen