Bug 973486 - Custom resolution not picked up by Gnome in xrdp/VNC session
Custom resolution not picked up by Gnome in xrdp/VNC session
Product: Fedora
Classification: Fedora
Component: gnome-settings-daemon (Show other bugs)
i686 Linux
unspecified Severity medium
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Assigned To: Bastien Nocera
Fedora Extras Quality Assurance
Depends On:
  Show dependency treegraph
Reported: 2013-06-11 23:28 EDT by Bojan Smojver
Modified: 2015-06-29 08:00 EDT (History)
8 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2015-06-29 08:00:35 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Dialog box saying that no such mode exists (24.42 KB, image/png)
2013-06-12 02:11 EDT, Bojan Smojver
no flags Details

  None (edit)
Description Bojan Smojver 2013-06-11 23:28:22 EDT
Description of problem:
First, I'm reporting this against gnome-desktop3, because I am not really sure which component would really be in charge of this. Second, this is a regression since F-18.

Upgraded to F-19 current and when I connect to my xrdp session using a custom resolution (1600 x 850), Gnome tells me that this does not match any known modes (gives a big dialog box listing modes to which the only option is to exit). This disconnects xrdp session. On the next connect, Gnome is running in 1920 x 1200 mode. No drama, I issue this in the shell (modeline produced by cvt):

xrandr --newmode "1600x850_60.00"  111.75  1600 1696 1856 2112  850 853 863 883 -hsync +vsync
xrandr --addmode VNC-0 1600x850_60.00

Session gets disconnected and when I login I get 1600 x 850. Cool.

Then I go to the control panel and apply these custom display settings, which get saved into .config/monitors.xml.

However, on the next logout/login (note: note disconnect - new session), this is not picked up and I have to do all of the above again. This was not the case in F-18.

Note that Xvnc (started by xrdp) is running with the correct geometry option, just like it did in F-18.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. See above.

Actual results:
Incorrect resolution forced.

Expected results:
Worked fine in F-18.

Additional info:
Comment 1 Bojan Smojver 2013-06-12 02:11:33 EDT
Created attachment 759960 [details]
Dialog box saying that no such mode exists
Comment 2 Bojan Smojver 2013-06-19 22:54:25 EDT
Let's try setting daemon - seems like there is code in there that's supposed to do this.
Comment 3 Bojan Smojver 2013-06-20 02:01:56 EDT
Workaround: disable xrandr plugin for gnome-settings-daemon. So, something is busted there.
Comment 4 Greg Sheremeta 2013-09-11 11:21:47 EDT
Disabling xrandr worked for me too. Thanks for that.

sudo yum install -y dconf-editor
browse to org -> gnome -> settings-daemon -> plugins > xrandr
and uncheck Active

I can now connect using rdesktop and force a resolution.
rdesktop -g 800x600 192.168.1.xxx
Comment 5 Bojan Smojver 2013-12-03 06:33:05 EST
That workaround does not work in F20.

For whatever reason, inside Xvnc started by xrdp, xrandr cannot see the actual resolution. So, I put dirty hack in /etc/X11/xinit/xinitrc.d:
g=$(pgrep -af "Xvnc ${DISPLAY/\.*/}" | cut -f 5 -d ' ')
m=$(cvt $(echo $g | tr x ' ') | tail -n -1 | cut -f 2- -d ' ' | tr -d '"')
s=$(xrandr | grep connected | cut -f 1 -d ' ')
n=$(echo $m | cut -f 1 -d ' ')
xrandr --newmode ${m[@]}
xrandr --addmode $s $n
Comment 6 Bojan Smojver 2013-12-03 17:52:35 EST
(In reply to Bojan Smojver from comment #5)
>  So, I put dirty hack in /etc/X11/xinit/xinitrc.d:

Probably slightly safer hack:
g=$(pgrep -af "Xvnc.*${DISPLAY/\.*/}" | \
    sed -e 's/.*-geometry \+\([0-9x]\+\).*/\1/' 2>/dev/null)
if [ -n "$g" ]; then
  m=$(cvt $(echo $g | tr x ' ') | grep ^Modeline | cut -f 2- -d ' ' | tr -d '"')
  s=$(xrandr | grep connected | cut -f 1 -d ' ')
  n=$(echo $m | cut -f 1 -d ' ')
  xrandr --newmode ${m[@]}
  xrandr --addmode $s $n
Comment 7 Bojan Smojver 2013-12-10 19:38:42 EST
Note that the above hack (from comment #5 or comment #6) only works if .config/monitors.xml exists. In other words, one has to go to settings and pick that display resolution (which will write that file).
Comment 8 Henderb Rodriguez 2014-01-04 23:57:37 EST
Hello all.

I can't install dconf-editor:

[henderb@kepler ~]$ sudo yum install -y dconf-editor
Downloading packages:
Running transaction check
Running transaction test

Transaction check error:
  file /usr/share/glib-2.0/schemas/ca.desrt.dconf-editor.gschema.xml from install of dconf-editor-0.18.0-2.fc20.i686 conflicts with file from package dconf-0.14.1-3.fc18.i686

Resumen de errores

[henderb@kepler ~]$ 

However, i solved my screen size problems with the following commands in the remote desktop (you must do the trick in the "bad" screen size display):

[henderb@kepler ~]$ xrandr 
Screen 0: minimum 32 x 32, current NNNN x MMM, maximum 32768 x 32768
VNC-0 connected primary NNNNxMMM+0+0 0mm x 0mm
   1920x1200      60.0  
   1920x1080      60.0  
   1600x1200      60.0  
   1680x1050      60.0  
   1400x1050      60.0  
   1360x768       60.0  
   1280x1024      60.0  
   1280x960       60.0  
   1280x800       60.0  
   1280x720       60.0* 
   1024x768       60.0  
   800x600        60.0  
   640x480        60.0  
[henderb@kepler ~]$ xrandr -s 1280x720
[henderb@kepler ~]$ 

Hope this helps.
Comment 9 Bojan Smojver 2015-04-28 03:15:18 EDT
This kinda works in F-21/22. On first ever login, xrdp won't be able to connect. However, later on, a connection will be established and Gnome will suggest a custom resolution in display settings (based on VNC).

So, from my perspective, this can be closed.
Comment 10 Fedora End Of Life 2015-05-29 05:07:00 EDT
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Comment 11 Fedora End Of Life 2015-06-29 08:00:35 EDT
Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is
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