Bug 350956

Summary:	Simple remote Konsole window using huge amount of bandwidth
Product:	[Applications] konsole	Reporter:	dag
Component:	general	Assignee:	Konsole Developer <konsole-devel>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	cpigat242, notuxius
Priority:	NOR
Version:	2.14.2
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:

Description dag 2015-08-04 09:43:03 UTC

Checked out why my remote konsole (over wifi) on one of the servers is so sluggish and found the konsole is constantly using about 0.7 MB/s bandwidth for the screen updates.
The setup is:
Server: Fedora 21 (dag)
X- Client: Mageia 5 over WiFi (eseries)

Startup command: ssh dag dbus-launch --exit-with-session konsole --display eseries:0.0

The command I am running in the console is nethogs

I have set the option QT_GRAPHICSSYSTEM=native on remote connections a long time ago as QT_GRAPHICSSYSTEM=raster makes everything very sluggish on remote connections.

Reproducible: Always

Steps to Reproduce:
1. Start up remote console
2. Start nethogs in the window
3. Check out the bandwidth use

Actual Results:  
Bandwidth usage is 700+ kB/s

Expected Results:  
A lot lower BW usage

Comment 1 dag 2015-12-19 09:57:34 UTC

Just "upgraded" to FC23 and got konsole v. 15.08.3 on KDE 5.17.0 (Qt 5.5.1) and now this problem is even worse - A lot worse..
The same procedure as described above will consume ALL the bandwith of my WiFi for one simple konsole window.
Come on guys, you are putting far too much effort into Wayland neglecting the current X-window remote user...

Comment 2 Alexander Mentyu 2018-07-27 05:41:27 UTC

Is this issue still relevant?

Comment 3 dag 2018-07-28 08:50:01 UTC

Sure is. But it seems to be by design and concerns ALL remote KDE windows. Stopped using konsole in favour of lxterminal. That still works the way X-window was designed to work. A shame that the KDE people decided to go this route...

Comment 4 Christoph Feck 2018-08-18 10:21:45 UTC

Qt no longer uses X11 calls to render text, it sends rendered bitmaps.

Comment 5 dag 2018-08-18 13:55:08 UTC

Exactly. The most stupid design decision ever...

Comment 6 Christoph Feck 2018-08-19 02:06:37 UTC

Never complain until you tried to do better.

Comment 7 dag 2018-08-19 12:14:09 UTC

Have been involved in a lot of open source projects since 1985 or so and also in the start of Qt so I think I am entitled to critisize this regression, and quite heavily so....