https://bugs.kde.org/show_bug.cgi?id=406316
Bug ID: 406316
Summary: krdc distorts screen, when connecting with medium
quality, and saturated GB ethernet in high quality
Product: krdc
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: VNC
Assignee: uwol...@kde.org
Reporter: h...@urpla.net
Target Milestone: ---
Created attachment 119288
--> https://bugs.kde.org/attachment.cgi?id=119288&action=edit
An distorted example
SUMMARY
When connecting via VNC from one openSUSE Tumbleweed system to another, I
harvest: screen distortions in medium quality, and a saturated GBit ethernet
connection with high quality. Only low quality behaves, but suffers from
quality perspective (as expected)-
STEPS TO REPRODUCE
1. use krdc 19.03.80 and below using VNC from TW 20190403 to TW 20190403,
2. choose medium quality, no forced resolution, no scaling
3. connect
OBSERVED RESULT
screen displays okay for the first draw, then more and more distortions appear
EXPECTED RESULT
proper display
SOFTWARE/OS VERSIONS
openSUSE Tumbleweed 20190403
KDE Frameworks 5.56.0
Qt 5.12.2 (kompiliert gegen 5.12.2)
Das xcb Fenstersystem
ADDITIONAL INFORMATION
krdc built here:
https://build.opensuse.org/package/show/home:frispete:Tumbleweed/krdc
The other end has VNC enabled within /etc/X11/xorg.conf.d/10-libvnc.conf:
Section "Module"
Load "vnc"
EndSection
Section "Screen"
Identifier "Screen0"
Option "SecurityTypes" "VncAuth"
Option "PasswordFile" "/root/.vnc/passwd"
EndSection
Running kdrc with debug options results in:
KRDC: Wallet OK
KRDC: Password read OK
KRDC: "VNC authentication succeeded"
KRDC: "Desktop name \"\b\""
KRDC: "Connected to VNC server, using protocol version 593193168.593193392"
KRDC: "VNC server default format:"
KRDC: "593193136 bits per pixel."
KRDC: "\b significant byte first in each pixel."
KRDC: "TRUE colour: max red 593193120 green 593193344 blue 16, shift red 8
green 8 blue 593193344"
KRDC: Client created
KRDC: 3 "Verbunden." "tw.lisa.loc" : 5900
KRDC: TCP keepalive set
KRDC: --------------------- Starting main VNC event loop ---------------------
KRDC: 1
KRDC: 2
KRDC: 3
KRDC: Found URL. Move it at the history start.
KRDC: Write wallet password
KRDC: Updating framebuffer size
KRDC: Resizing: 1920 1200
KRDC: tabwidget resize, view size: w: 1920 , h: 1200
KRDC: new window size: QSize(1920, 1270) available space: QSize(2560, 1560)
The other end is using 1920x1200x24 and kdm due to sddm missing XDMCP...
The krdc vnc lib is libvncclient1-0.9.12-1.1.x86_64, and tigervnc on the server
is 1.9.0.
I've tried a couple of older krdc revisions, but the problem persists.
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