https://bugs.kde.org/show_bug.cgi?id=404092
Chris <inkbottle...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |inkbottle...@gmail.com
--- Comment #10 from Chris <inkbottle...@gmail.com> ---
I have a very similar issue. No need to say it renders the use of wayland
impossible.
Most aspects are almost identical as with the initial reporter:
1- the full contraption works perfectly well with x11.
2- laptop is a thinkpad too, x230 i5-3210m.
3- connected with display port, w/o the docking-station.
4- external monitor is almost identical.
5- Perfectly functioning x11 session:
```json
// file: ~/.local/share/kscreen/ccf9312b34a5632b2088ba77ae1deca1
[
{
"enabled": true,
"id": "b22c96618384c6ee61bc5a283a0d5344",
"metadata": {
"fullname": "xrandr-unknown",
"name": "LVDS-1"
},
"mode": {
"refresh": 60.018943786621094,
"size": {
"height": 768,
"width": 1366
}
},
"pos": {
"x": 0,
"y": 0
},
"primary": false,
"rotation": 1,
"scale": 1
},
{
"enabled": true,
"id": "cd786af8018aba645a80a575407bd2bb",
"metadata": {
"fullname": "xrandr-Dell Inc.-DELL P2715Q-V48W26BSABQL",
"name": "DP-1"
},
"mode": {
"refresh": 29.980602264404297,
"size": {
"height": 2160,
"width": 3840
}
},
"pos": {
"x": 1366,
"y": 0
},
"primary": true,
"rotation": 1,
"scale": 1
}
]
```
6- The sort of weird things observed with wayland session.
```json
// file: ~/.local/share/kscreen/ab65ed9ee0630b833fef7a5710f399f1
[
{
"enabled": true,
"id": "LG Display LVDS-1-unknown",
"metadata": {
"name": "LG Display LVDS-1-unknown"
},
"mode": {
"refresh": 60.01900100708008,
"size": {
"height": 768,
"width": 1366
}
},
"pos": {
"x": 1920,
"y": 0
},
"primary": false,
"rotation": 1,
"scale": 1
},
{
"enabled": true,
"id": "Dell Inc. DP-1-DELL P2715Q/V48W26BSABQL",
"metadata": {
"name": "Dell Inc. DP-1-DELL P2715Q/V48W26BSABQL"
},
"mode": {
"refresh": 60.00400161743164,
"size": {
"height": 768,
"width": 1024
}
},
"pos": {
"x": 0,
"y": 0
},
"primary": true,
"rotation": 1,
"scale": 0.8984
}
]
```
Look at the strange scale of 0.8984; the interface only allows for .5, .75, 1.,
1.25, etc.
The reality of the experience is much worse than what the file suggests: The
screens are partly overlapping, clicking on maximize window on the laptop
screen makes the window like 10% larger that the screen itself. Colors on the
4K screen are, depending on luck, like coded on 2 bits.
7- Like with the initial reporter, with a lot of random tinkering, sometimes it
works. Results however vanish as soon as you log-out. And are not reproducible.
8- The same configuration was working with wayland, like 6 month ago. However
it took several minutes to reconfigure after each login. So I moved back to
x11.
9- Weird quotes from initial poster, which I similarly experienced:
"It actually *is* possible to get the same mode in Wayland session but it is a
major hassle, requires unplugging and replugging of the external display at the
right time and even then the results are sort of random."
Even though in my case the steps were different and replugging mostly set the
external monitor in a sort of dead grey, with the pointer being able to go on a
20% width vertical band on the right of the screen.
"System settings panel looks as if everything was fine, the display layout and
resolutions look okay but the ext. display's actual mode is 1280x720@60 Hz."
Yes, yes, I even took pictures of the systemsetting window at the time it
happened: "every thing is perfect", "perfectly good". Even though the screen
looks like a C64's 600x400, even the colors are similar.
And many other oddities.
10- At the moment, I have the 4K screen at full resolution 30hz, and the laptop
screen at 60hz, with x11. So it is not a problem with the GPU being able to
take the load.
11- I almost forgot the system specifications:
System is Debian Unstable upgraded yesterday.
Last install:
`apt install plasma-workspace-wayland`
```
Operating System: Debian GNU/Linux
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2
Kernel Version: 5.10.0-1-amd64
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-3210M CPU @ 2.50GHz
Memory: 7.5 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4000
```
Driver is "modesetting".
Thanks a lot.
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