[Pkg-tigervnc-devel] Bug#855350: Bug#855350: tigervnc-xorg-extension: Loading the tigervnc the extension makes the x server practically unusable

[John Tyner]

I thought I might be able to shed a little more light on this:

I didn't realize that one could create xorg.conf fragments in the
xorg.conf.d directory, so I started by running 'Xorg -configure' to
generate a configuration file. I then modified that to load the vnc module.
This ran fine--without the X server sluggishness--and I was eventually able
to get the server to accept connections using Martin's advice in Message
#10.

Then I discovered the xorg.conf.d fragment directory. I removed my
xorg.conf and loaded the vnc module from a configuration fragment in
/usr/share/X11/xorg.conf.d. I immediately began experiencing the server
sluggishness, and my Xorg.0.log is spitting out a slew of messages:

[<timestamp>]: (EE) modeset(0): failed to set mode: Permission denied

every 5 seconds.

I hope this information is of value to someone.

John

On Tue, 28 Feb 2017 23:16:10 +0100 Ola Lundqvist wrote:
> tags 855350 + help
> thanks
>
> Hi Kertesz and Martin
>
> Thank you for the report and information regarding options.
>
> The performance issue is definitely a problem. I do not have a solution at
> the moment.
>
> I have a little problem testing this myself at the moment as only have sid
> in a chroot and X will not really start for me there.
>
> So if anyone have the possibility to look into this and provide a patch
> that would be excellent!
>
> Best regards
>
> // Ola
>
>
>
> On 18 February 2017 at 08:12, Martin Dorey wrote:
>
> > > i could not find a way to actually pass options
> >
> > I eventually managed to get a default configured Stretch box to accept a
> > remote connection using:
> >
> > mad at shuttle:~$ cat /usr/share/X11/xorg.conf.d/75-vnc-mad.conf
> > Section "Device"
> > Identifier "Device"
> > EndSection
> > Section "Screen"
> > Identifier "Screen"
> > Device "Device"
> > Option "PasswordFile" "/u2/home/mad/.vnc/passwd"
> > EndSection
> > mad at shuttle:~$
> >
> > It seems, from the source, that the PasswordFile Option is only looked
for
> > in the Screen section and the Screen section has to have an Identifier
and
> > a Device, which has to refer to a Device section, which needs an
> > Identifier. Argh, but, OK, whatever. Then I have other problems, both
> > keeping the connection up and with redraw, but I fear that elaborating
them
> > here would be a hijack of the OP's bug, the main symptom of which - a
> > horrible-sounding performance issue - I don't see with Gnome 3.
> >
> >
> > _______________________________________________
> > Pkg-tigervnc-devel mailing list
> > Pkg-tigervnc-devel at lists.alioth.debian.org
> >
http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-tigervnc-devel
> >
>
>
>
> --
> --------------------- Ola Lundqvist ---------------------------
> / opal at debian.org Folkebogatan 26 \
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