rivers@bnlls1.nsls.bnl.gov (Mark Rivers) (03/22/91)
I am having a problem with backing store in PV-WAVE 3.03 under X windows. The default backing store mechanism is supposed to be that PV-WAVE requests the server to do the backing store. This is also supposed to be the behavior for all subsequent windows created after a "DEVICE, RETAIN=1" command. However, neither of these work for me. I have used two different X windows devices, both of which I believe are capable of backing store: DECWindows on a VAXStation 3200 and a Tektronix XN11 terminal (which was set up to have backing store enabled). DEVICE, RETAIN=2 works, but is quite slow because PV-WAVE itself makes the backing store. Has anyone else seen this problem and/or found a fix? Mark Rivers (516) 282-7708 or 5626 Building 815 rivers@bnlx26.nsls.bnl.gov (Internet) Brookhaven National Laboratory rivers@bnl (Bitnet) Upton, NY 11973 BNLX26::RIVERS (Physnet)
william@kaula.keck.hawaii.edu (William Lupton) (03/22/91)
In article <2676@bnlux0.bnl.gov>, rivers@bnlls1.nsls.bnl.gov (Mark Rivers) writes... > >I am having a problem with backing store in PV-WAVE 3.03 under X windows. The >default backing store mechanism is supposed to be that PV-WAVE requests the >server to do the backing store. This is also supposed to be the behavior for >all subsequent windows created after a "DEVICE, RETAIN=1" command. However, >neither of these work for me. I have used two different X windows devices, >both of which I believe are capable of backing store: DECWindows on a >VAXStation 3200 and a Tektronix XN11 terminal (which was set up to have backing >store enabled). DEVICE, RETAIN=2 works, but is quite slow because PV-WAVE >itself makes the backing store. > >Has anyone else seen this problem and/or found a fix? Running the same version of PV~WAVE as you on VAXstation 3100's we observe the same behavior as you (and use RETAIN=2). I just assumed that the server didn't support backing store. We have recently borrowed a NCD X-terminal. Its X server can be configured to provide backing store "on demand". With this setting, RETAIN=1 works and gives instantaneous re-paint on window move, expose etc. Very nice. So I suspect that the problem is that your X servers are not in fact configured to provide backing store on demand. William Lupton (wlupton@keck.hawaii.edu)