[winswitch] DPI Issue with HTML Client

Wed Feb 13 19:16:22 GMT 2019

I am running the HTML client in Chrome version 72.0.3626.81 on Windows 7.  The server is running on an Amazon Web Services EC2 instance with RedHat Enterprise edition using CentOS 7 repositories.

The issue I'm having is that I get the following message in the browser window:  DPI Issue  DPI set to 14 x18 (wanted 96 x96) you may experience.... you know the rest.  I get the same message when I run the HTML client on my Mac with Safari.  I would ignore it but running xeyes as a test yields strange drawing behavior.  I also ran python "Turtle" code and the window contents are jammed into the upper left corner, with scroll bars until I resize the window which fixes the problem.  I've gone through the wiki and it seems like the DPI issues were resolved with the Xdummy driver which from what I can understand are automatically installed and configured with install.  

Below is the command line I used to start the server, as well as the two log files I thought might provide some information.  Did I miss something simple?

sudo xpra --dpi=48 start  --dpi=48  --start-new-commands=yes --min-port=80 --bind-tcp=0.0.0.0:80 --html=on --start=xterm

Xpra Log file:

2019-02-13 18:39:26,835 Error: cannot enable SSH socket upgrades:
2019-02-13 18:39:26,835  No module named paramiko
2019-02-13 18:39:26,837 cannot access python uinput module:
2019-02-13 18:39:26,837  No module named uinput

X.Org X Server 1.20.1
X Protocol Version 11, Revision 0
Build Operating System:  3.10.0-862.2.3.el7.x86_64 
Current Operating System: Linux ip-172-31-45-17.us-east-2.compute.internal 3.10.0-957.5.1.el7.x86_64 #1 SMP Wed Dec 19 10:46:58 EST 2018 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.5.1.el7.x86_64 root=UUID=88fd4d41-c180-4721-80c6-535249a4a2bb ro console=ttyS0,115200n8 console=tty0 net.ifnames=0 rd.blacklist=nouveau crashkernel=auto LANG=en_US.UTF-8
Build Date: 13 December 2018  01:42:15PM
Build ID: xorg-x11-server 1.20.1-5.2.el7_6 
Current version of pixman: 0.34.0
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(++) Log file: "/tmp/Xorg.S14656.log", Time: Wed Feb 13 18:39:26 2019
(++) Using config file: "/etc/xpra/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
2019-02-13 18:39:27,372 Warning: failed to create socket directory '/run/user/0/xpra'
2019-02-13 18:39:27,372  [Errno 2] No such file or directory: '/run/user/0/xpra'
2019-02-13 18:39:27,372 Warning: cannot create socket '/run/user/0/xpra/ip-172-31-45-17.us-east-2.compute.internal-0':
2019-02-13 18:39:27,373  [Errno 2] No such file or directory
2019-02-13 18:39:27,373  ($XDG_RUNTIME_DIR has not been created?)
2019-02-13 18:39:27,373 created unix domain socket: /run/xpra/ip-172-31-45-17.us-east-2.compute.internal-0
2019-02-13 18:39:27,373 Warning: missing sound module
2019-02-13 18:39:27,442 pointer device emulation using XTest
2019-02-13 18:39:27,865  OpenGL is supported on this display
WARNING: no 'numpy' module, HyBi protocol will be slower
2019-02-13 18:39:27,903 serving html content from: /usr/share/xpra/www
2019-02-13 18:39:27,916 D-Bus notification forwarding is available
2019-02-13 18:39:27,954 Warning: webcam forwarding is disabled
2019-02-13 18:39:27,954  the virtual video directory '/sys/devices/virtual/video4linux' was not found
2019-02-13 18:39:27,954  make sure that the 'v4l2loopback' kernel module is installed and loaded
2019-02-13 18:39:27,954 found 0 virtual video devices for webcam forwarding
2019-02-13 18:39:28,072 xpra X11 version 2.4.3-r21370 64-bit
2019-02-13 18:39:28,073  uid=0 (root), gid=0 (root)
2019-02-13 18:39:28,073  running with pid 14663 on Linux Red Hat Enterprise Linux Server 7.6 Maipo
2019-02-13 18:39:28,073  connected to X11 display :0 with 24 bit colors
2019-02-13 18:39:28,163 xpra is ready.
2019-02-13 18:39:28,192 printer forwarding enabled using postscript and pdf
2019-02-13 18:39:28,202 1.0GB of system memory

Just the first bit of  Log file: "/tmp/Xorg.S14656.log" as referenced above
[ 17503.988] 
X.Org X Server 1.20.1
X Protocol Version 11, Revision 0
[ 17503.988] Build Operating System:  3.10.0-862.2.3.el7.x86_64 
[ 17503.988] Current Operating System: Linux ip-172-31-45-17.us-east-2.compute.internal 3.10.0-957.5.1.el7.x86_64 #1 SMP Wed Dec 19 10:46:58 EST 2018 x86_
64
[ 17503.988] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.5.1.el7.x86_64 root=UUID=88fd4d41-c180-4721-80c6-535249a4a2bb ro console=ttyS0,11520
0n8 console=tty0 net.ifnames=0 rd.blacklist=nouveau crashkernel=auto LANG=en_US.UTF-8
[ 17503.988] Build Date: 13 December 2018  01:42:15PM
[ 17503.988] Build ID: xorg-x11-server 1.20.1-5.2.el7_6 
[ 17503.988] Current version of pixman: 0.34.0
[ 17503.988]    Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
[ 17503.988] Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 17503.988] (++) Log file: "/tmp/Xorg.S14656.log", Time: Wed Feb 13 18:39:26 2019
[ 17503.988] (++) Using config file: "/etc/xpra/xorg.conf"
[ 17503.988] (EE) Unable to locate/open config directory: "/run/user/0/xpra/xorg.conf.d/14663"
[ 17503.988] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 17503.997] (==) ServerLayout "dummy_layout"
[ 17503.997] (**) |-->Screen "dummy_screen" (0)
[ 17503.997] (**) |   |-->Monitor "dummy_monitor"
[ 17504.000] (**) |   |-->Device "dummy_videocard"
[ 17504.000] (**) Option "DontVTSwitch" "true"
[ 17504.000] (**) Option "AllowMouseOpenFail" "true"
[ 17504.000] (**) Option "AutoAddDevices" "false"
[ 17504.000] (**) Option "AutoEnableDevices" "false"
[ 17504.000] (**) Not automatically adding devices
[ 17504.000] (**) Not automatically enabling devices
[ 17504.000] (==) Automatically adding GPU devices
[ 17504.000] (==) Automatically binding GPU devices
[ 17504.000] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 17504.000] (==) FontPath set to:
        catalogue:/etc/X11/fontpath.d,
        built-ins
[ 17504.000] (==) ModulePath set to "/usr/lib64/xorg/modules"
[ 17504.000] (==) |-->Input Device "<default pointer>"
[ 17504.000] (==) |-->Input Device "<default keyboard>"
[ 17504.000] (==) The core pointer device wasn't specified explicitly in the layout.
        Using the default mouse configuration.
[ 17504.000] (==) The core keyboard device wasn't specified explicitly in the layout.
        Using the default keyboard configuration.