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Bug#708980: marked as done (xserver-xephyr does not open a window)

Your message dated Tue, 21 May 2013 14:46:16 +0200
with message-id <20130521124616.GC12846@radis.cristau.org>
and subject line Re: Bug#708980: xserver-xephyr does not open a window
has caused the Debian Bug report #708980,
regarding xserver-xephyr does not open a window
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
708980: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=708980
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: xserver-xephyr
Version: 2:1.12.4-6
Severity: important

Dear Maintainer,

Xephyr stopped working for me some days ago. At first I thought it is some
problem of the enlightenment 17 build I use. Today I have tried to run bbox,
gnome-session and other WMs but none of them worked.

I use the following script to start my sessions:
» cat desktop-xephyr 
#!/bin/bash
if [[ -z "$@" ]]; then
    echo "you need to supply something to be started in Xephyr"
    exit 1
fi

xdisplay()
{
    local disp=0;
    while [ -e "/tmp/.X${disp}-lock" ]; do
        disp=$(( disp + 1 ));
    done;
    echo $disp
}

#select display
display=$(xdisplay)

#start xserver
Xephyr -ac -screen 1600x900 -br 2> /dev/null :$display &

#set display
export DISPLAY=:$display

#wait for Xephyr to become ready
sleep 1

#start window manager
bash -c "$@"

#remove x lock
rm -fr /tmp/.X${display}-lock

And it creates the following output:

» bash -x desktop-xephyr /usr/bin/blackbox 
+ [[ -z /usr/bin/blackbox ]]
++ xdisplay
++ local disp=0
++ '[' -e /tmp/.X0-lock ']'
++ disp=1
++ '[' -e /tmp/.X1-lock ']'
++ echo 1
+ display=1
+ export DISPLAY=:1
+ Xephyr -ac -screen 1600x900 -br :1
+ DISPLAY=:1
+ sleep 1
+ bash -c /usr/bin/blackbox
bt::Display: failed to open display ''
+ rm -fr /tmp/.X1-lock


I think running "+ Xephyr ..." line used to open a window. But this is not
happening anymore.

Please give me some hints how to provide more useful information.

Regards,
Jan C. Uhde


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.8-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages xserver-xephyr depends on:
ii  libaudit0                 1:1.7.18-1.1
ii  libc6                     2.17-3
ii  libdrm2                   2.4.40-1~deb7u2
ii  libgcrypt11               1.5.0-5
ii  libgl1-mesa-glx [libgl1]  8.0.5-5
ii  libpixman-1-0             0.26.0-4
ii  libselinux1               2.1.13-1
ii  libx11-6                  2:1.5.0-1
ii  libxau6                   1:1.0.7-1
ii  libxdmcp6                 1:1.1.1-1
ii  libxext6                  2:1.3.1-2
ii  libxfont1                 1:1.4.5-2
ii  libxv1                    2:1.0.7-1
ii  xserver-common            2:1.12.4-6

Versions of packages xserver-xephyr recommends:
ii  libgl1-mesa-dri  8.0.5-5

xserver-xephyr suggests no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
On Mon, May 20, 2013 at 00:55:22 +0200, Jan Christoph Uhde wrote:

> Package: xserver-xephyr
> Version: 2:1.12.4-6
> Severity: important
> 
> Dear Maintainer,
> 
> Xephyr stopped working for me some days ago. At first I thought it is some
> problem of the enlightenment 17 build I use. Today I have tried to run bbox,
> gnome-session and other WMs but none of them worked.
> 
> I use the following script to start my sessions:
> » cat desktop-xephyr 
> #!/bin/bash
> if [[ -z "$@" ]]; then
>     echo "you need to supply something to be started in Xephyr"
>     exit 1
> fi
> 
> xdisplay()
> {
>     local disp=0;
>     while [ -e "/tmp/.X${disp}-lock" ]; do
>         disp=$(( disp + 1 ));
>     done;
>     echo $disp
> }
> 
> #select display
> display=$(xdisplay)
> 
> #start xserver
> Xephyr -ac -screen 1600x900 -br 2> /dev/null :$display &
> 
> #set display
> export DISPLAY=:$display
> 
> #wait for Xephyr to become ready
> sleep 1
> 
> #start window manager
> bash -c "$@"
> 
> #remove x lock
> rm -fr /tmp/.X${display}-lock
> 
> And it creates the following output:
> 
> » bash -x desktop-xephyr /usr/bin/blackbox 
> + [[ -z /usr/bin/blackbox ]]
> ++ xdisplay
> ++ local disp=0
> ++ '[' -e /tmp/.X0-lock ']'
> ++ disp=1
> ++ '[' -e /tmp/.X1-lock ']'
> ++ echo 1
> + display=1
> + export DISPLAY=:1

Setting DISPLAY to the Xephyr display before starting Xephyr seems
broken.  That also doesn't correspond to the script above.

> + Xephyr -ac -screen 1600x900 -br :1
> + DISPLAY=:1
> + sleep 1
> + bash -c /usr/bin/blackbox
> bt::Display: failed to open display ''
> + rm -fr /tmp/.X1-lock
> 
> 
> I think running "+ Xephyr ..." line used to open a window. But this is not
> happening anymore.
> 
> Please give me some hints how to provide more useful information.
> 
What happens if you just run Xephyr outside of your script, and without
sending its output to /dev/null?  Seems like your blackbox command
doesn't get $DISPLAY properly.  Anyway, there's no evidence of a bug
here, so I'll close this.

Cheers,
Julien

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