First you need to find out what cards you have and what driver they are using.
Do lspci -v and look for lines including VGA. That will tell you what cards you have and what module (=driver) you have loaded. You may need the ati or nvidia propietary drivers which generally do not get installed by default due to licence issues. On Tue, 15 Jun 2010 04:32:47 -0500, Nagaraj Panyam wrote > Hi, > > We have a strange problem about graphics display. Our users run > GEANT4 on a remote server and view the display on local desktop > using x11forwarding. > > In the forwarded display GEANT4 display on the desktops, the > particle tra cks appear Ok, but the detector outline is missing, we > tried changing colors, > > etc. The remote server is SL4 and the desktop is SL5. This problem > was no t there when the same desktops were running SL4. I paste an > expert's opinio n here. > > > This situation almost always means that you have the wrong driver for > > your graphics card. The driver you have is correctly handling polylines > > > (hence trajectories are working) but is not properly handling polygons > > (hence detector geometry is not working). > > > > The solution is to figure out exactly which graphics card you have and > > then download the specific driver from the graphics card manufacturer. > > > > I am stumped. The graphics driver was auto detected at install time, > and I trust that the driver is fine because there doesn't seem to be > any proble m with any other display. How do I verify that indeed the > driver is the problem? Or any other workaround? If indeed the driver > needs to be change d, how do I go about it? > > Infact, the display problem started appearing on desktops with different > models of graphics cards, after upgrade to SL5,so its not related to > any one model. > > Thanks > Nagaraj Alex Finch, Research Fellow, Physics Department, Lancaster University. +44 (0) 1524 593618 http://www.lancs.ac.uk/depts/physics/staff/finch.htm
