[Bug 792251] Re: krdc vnc becomes extremely slow after a few seconds

Sun Dec 30 22:15:32 UTC 2012

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https://bugs.kde.org/show_bug.cgi?id=274816.

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On 2011-06-03T10:42:43+00:00 Dennis Schridde wrote:

Version:           unspecified (using KDE 4.6.2) 
OS:                Linux

After a few seconds into a vnc connection it will become very slow. The
cursor follows the mouse hardly, until it stops almost completely
(and/or updates only after tens of seconds) and mouse/key presses will
only have an effect after minutes. In addition the visible area is only
updated very very slowly: I first see half of the screen, then a few
blocks more, and after some minutes the full screen, until the process
starts freshly.

The downstream Ubuntu-bug #792251 is at
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251 ,
providing more information on installed software.

Reproducible: Always

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/3

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On 2011-06-03T10:43:52+00:00 Dennis Schridde wrote:

P.S: This appears to be a bug in KDE, since gvncviewer (using gtk-vnc)
is extremely fast. The network connection is 1Gbps Ethernet.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/4

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On 2011-06-03T10:50:14+00:00 Uwolfer wrote:

Can you please check if there is high CPU load when KRDC gets slow?
Memory ussage?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/5

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On 2011-06-03T12:11:58+00:00 Dennis Schridde wrote:

CPU utilisation is at maximum (2.6GHz AMD Athlon64 X2) and memory usage
is VIRT:375M RES:32M SHR:22M (retrieved via htop).

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/6

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On 2011-08-05T19:17:44+00:00 Uwolfer wrote:

Can you reproduce this issue all the time? Do you have a slow
connection?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/7

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On 2011-08-09T08:57:36+00:00 Dennis Schridde wrote:

The connection is gigabit LAN and the problem was [1] reproducible every time.
The server was provided by Xen running on a x86_64 RHEL 5.6.

[1] I did not try again since reporting the bug, but until then it was
reproducible for several weeks.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/8

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On 2012-02-04T06:10:56+00:00 Smithjd15 wrote:

KRFB and KRDC seem to function fairly well as a pair after kde 4.8.0. I
think the issue may have been in kwin.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/9

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On 2012-02-04T12:36:10+00:00 Dennis Schridde wrote:

(In reply to comment #6)
> KRFB and KRDC seem to function fairly well as a pair after kde 4.8.0. I think
> the issue may have been in kwin.
The issue did not appear in conjunction with KRFB, but with the Xen VNC server. Does the KRFB/KRDC combination use VNC at all?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/10

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On 2012-02-06T08:50:32+00:00 Smithjd15 wrote:

On Saturday February 4 2012 12:36:10 PM Dennis Schridde wrote:
> https://bugs.kde.org/show_bug.cgi?id=274816
> 
> 
> 
> 
> 
> --- Comment #7 from Dennis Schridde <devurandom gmx net>  2012-02-04
> 12:36:10 --- (In reply to comment #6)
> 
> > KRFB and KRDC seem to function fairly well as a pair after kde 4.8.0. I
> > think the issue may have been in kwin.
> 
> The issue did not appear in conjunction with KRFB, but with the Xen VNC
> server. Does the KRFB/KRDC combination use VNC at all?

I often confuse krdc / krfb but the server uses vnc and the client uses rdp 
and vnc.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/11

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On 2012-12-30T18:16:18+00:00 Uwolfer wrote:

Can you still reproduce this issue with xen vnc and a recent version of
KRDC?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/15

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On 2012-12-30T20:10:41+00:00 Dennis Schridde wrote:

(In reply to comment #9)
> Can you still reproduce this issue with xen vnc and a recent version of KRDC?
I did not try in a long time. We use Vinagre now.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/792251/comments/16

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Title:
  krdc vnc becomes extremely slow after a few seconds

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