On 02/25/10 13:42, ti...@piments.com wrote: > Hi, I've split from earlier discussion entitled tigerVNC configuration > problems > > to recap , I call the viewer within a secure shell on the remote machine: > > ssh -C -X -L 5900:localhost:5900 remotesys.dyndns.info > vncviewer localhost:0 > > Both ends are recent linux. Tigervnc was built from source on remote > Kubuntu 9.04 system using kubuntu xorg source tree and tigervnc-1.0.0 tar.gz > > > technically it seems to work fine but it is very slow. > > > On 02/24/10 21:38, DRC wrote: >> ti...@piments.com wrote: >>> Thanks, that is what I would expect to be the case but without -C it is >>> about an order of magnitude slower! Completely unusable. I had to break >>> the viewer from its command line. >>> >>> Would that suggest that there is no jpeg compression happening? >> >> Hmmm... Weird. Again, try explicitly dialing in a lower quality level. >> I struggle to imagine how SSh could further compress a JPEG stream, but >> maybe if the JPEG quality is high enough it can. >> >> > > 1. autodetection not working > > man vncviewer: > > AUTOMATIC PROTOCOL SELECTION > The viewer tests the speed of the connection to the server and > chooses > the encoding and pixel format (color level) appropriately. > This makes > it much easier to use than previous versions where the user > had to > specify arcane command line arguments. > > > No this is not working. Connection information shows typically 20000 > kb/s , the remote end is 300kB/s connectivity , local end is only 88kB/s > at best , currently only 40kB/s . > > Is the auto detection effectively testing the connection to localhost > when run in this context? > Running the viewer on the local machine rather than inside the ssh shows more credible bandwidth results
vncviewer remote.dyndns.org:0 now options dlg shows a 43 kB/s this is credible for the server's connection to internet but not for the link as a whole constrained by local speed of 48kB/s Since this is a viewer option presumably it should relate to the link between server and client not servers network connection. I think this and the 20000kb/s shown when running on localhost shows the test is probably not testing the right thing. > > > 2. There does not seem to be a documented option ot turn off jpeg > compression. > Ah, vncviewer -help seems more complete than the manpage. NoJPEG=1 Still looking for solutions to the compression issues raised in 3,4,5 of the previous post . thx. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Tigervnc-users mailing list Tigervnc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tigervnc-users
