(..) >> The most important thing for local connections is to enable mmap. (see >> mmap command line options and use "-d mmap" to enable debug logging) > > My system explicitly says mmap disabled, shouldn't that be detected > automatically? > > Both accounts are member of the xpra group. I start the server with > ssh marc@localhost xpra start --mmap=/var/tmp/mh-mmap -d mmap > --mmap-group --socket-dir=/var/tmp Why change the socket-dir? The defaults should include /run/xpra which should be writable by members of the xpra group. > --speaker=off --encoding=png/P Don't change the encoding unless you really know what you are doing. Especially not for png/P which is very rarely a good option. > --daemon=no --dpi=96 --webcam=no --mdns=no --pulseaudio=no > --start=konsole :100 > which makes the socket show up in /var/tmp with marc:xpra 660. When I > then start the client as > xpra attach ssh:marc@localhost:100 --mmap=/var/tmp/mh-mmap > --socket-dir=/var/tmp --mmap-group --dpi=96 --desktop-scaling=off -d > mmap > I see /var/tmp/mh-mmap appear for a short time as mh:mh 775, then I see > the server complaining: > 2018-12-11 18:36:48,410 client supplied mmap_file=/var/tmp/mh-mmap > 2018-12-11 18:36:48,410 mmap supported=True, > token=242228041280381797676313904508936308232 > 2018-12-11 18:36:48,410 using global server specified mmap file path: > '/var/tmp/mh-mmap' > 2018-12-11 18:36:48,411 Error: cannot access mmap file '/var/tmp/mh-mmap': > 2018-12-11 18:36:48,411 [Errno 13] Permission denied: '/var/tmp/mh-mmap' > 2018-12-11 18:36:48,411 see mmap-group option? > 2018-12-11 18:36:48,411 found client mmap area: None, 0 bytes - min mmap > size=67108864 > and then the mmap file disappears again. I think you need to make the 'xpra' group the primary group of the user.
> What am I doing wrong? Not much, cross-user shared memory requires some tweaking. (the feature has not really been updated much for the last 6 years..) To make it easier, we should enhance the mmap-group option so users can specify the group they want to use directly: https://xpra.org/trac/ticket/2075 ie: --mmap-group=xpra >>> I notice that the server complains twice on startup: >>> 2018-12-08 20:19:08,741 cannot use uinput for virtual devices: >>> 2018-12-08 20:19:08,741 [Errno 13] Failed to open the uinput device: >>> Permission denied >> Harmless and completely safe to ignore. >>> WARNING: no 'numpy' module, HyBi protocol will be slower >> This one is bogus. >> >> Both have been added to the FAQ: >> https://xpra.org/trac/wiki/FAQ > > Did I miss that or was it added just recently? Both were added yesterday, but they were available elsewhere on the wiki before that. >>> Here is what the server logs: >>> marc@fan:~$ xpra start --daemon=no --speaker=off --webcam=no --mdns=no >>> --pulseaudio=no --start=konsole :100 >>> 2018-12-08 20:20:27,121 cannot use uinput for virtual devices: >>> 2018-12-08 20:20:27,121 [Errno 13] Failed to open the uinput device: >>> Permission denied >> (..)> 2018-12-08 20:23:57,360 DPI set to 51 x 48 (wanted 54 x 77) >>> 2018-12-08 20:23:57,361 you may experience scaling problems, such as huge >>> or small fonts, etc >>> 2018-12-08 20:23:57,361 to fix this issue, try the dpi switch, or use a >>> patched Xorg dummy driver >> That's odd. Make sure to use the patched dummy driver from the repository. > > I'd rather refrain from having to patch my xorg, You're not patching xorg, just the dummy driver. > I can live with giving > hard-coded dpi values (which I usually do, but didn't do when creating > these mails to make things simpler). OK. Note that there is at least one more non-DPI bug you may encounter with the unpatched driver. >> (..)> In the panel applet, I have set Picture => Fixed speed to "Lowest >>> latency". The session information claims that I have 60 ms frame total >>> latency, but it feels like a multiple of that. Any networked RDP session >>> to a Windows machine feels much faster. >> Even remote connections should be as fast as RDP, let alone local ones. > > They're not. > >> Feel free to create a ticket to fix the non-mmap case. > > Like "xrdp very slow" and giving the same information like in the thread > starting message? That's a good start, more guidelines can be found here: https://xpra.org/trac/wiki/ReportingBugs Based on recent similar reports, you may want to attach the server's debug log with "-d bandwidth,stats" added to the command line. Cheers, Antoine > > Greetings > Marc > _______________________________________________ shifter-users mailing list shifter-users@lists.devloop.org.uk http://lists.devloop.org.uk/mailman/listinfo/shifter-users
