Mapping issues with the Tablet KCM

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,
1

Hey yall, it seems like i have some issue with the tablet settings where the screen mapper doesnt seem to work. Either there is a config file that gets prioritised over the usual one found in the .config and I’m an idiot for not finding it or there is a bug.

So The following picture, I got 3 screens driven by mesa on an AMD card: a 60hz 1080p monitor, a 144hz 1080p monitor and a 1440p 60hz pendisplay. I am on fedora 42 obviously KDE on version 6.4 and use Wayland. this is all fine and dandy.

The problem is that the tablet settings remember my screen choice but i have a guess that something either crashes and falls back to the Libinput defaults or a rouge config file is playing tricks on me. Like this is only a QoL issue and doesnt inhibit my ability to draw but its still annoying. A few pointers to either submit a bugreport or where to find possible configs would be cool :3

2

Hey,

since I am not using a multi monitor setup its not super clear what your problem is. Maybe you can add a picture?

The config file (for mouse and tablet libinput stuff) should be in ~./config/kcminputrc.

If you want to report a bug you can do it at https://bugs.kde.org/
“Product” Systemsettings, “component” kcm_tablet

Here is a list of all open and closed bugs, in case you want to check before you write a bug report: Bug List

CC: @redstrate

1 Like
3

Okay so, you have the interface that lets you map the output of the tablet/digitizer to a screen, which in my case i want to map to my Pendisplay(screentablet).

But nothing happens regarding the screen assignment and it stays on the default option that libinput uses (or so i assume) yet the UI remembers what option i had selected. Even when deleting the Config lines manually. So dunno.

What I expect to happen when the mapping works, is that the tablet output is always on the tablet screen and not the last screen I click in.

Screenshot_20250622_230456
Screenshot_20250622_230456522×608 20.3 KB

this interface

4

That’s strange, that’s definitely not supposed to happen when you explicitly select a monitor. I have an open bug report related to this setting, so I’ll be investigating it soon anyway :slight_smile:

2 Likes
5

very cool ! :3 I found a similar new confirmed bughttps://bugs.kde.org/show_bug.cgi?id=505768 and the kcminputrc config file reads the values i had set (in my case HDMI-A-1) but it seems to get ignored

1 Like
6

Can you post the output of both kscreen-doctor -o and cat ~/.kcminputrc somewhere (either in a code block or pastebin, whichever is easiest for you.) I want to make sure the output names are being set correctly.

Also just to be sure, the tablet KCM doesn’t list multiple devices to switch between right?

7

Sorry for the late reply i went to bed in the meantime, here are the outputs:

Screendoctor

Output: 1 DP-2 908c3e27-c63e-4fa8-843a-1d4e35f324cb
        enabled
        connected
        priority 2
        DisplayPort
        replication source:0
        Modes:  1:1920x1080@60*!  2:1920x1080@60  3:1920x1080@60  4:1920x1080@50  5:1680x1050@60  6:1280x1024@75  7:1280x1024@60  8:1440x900@60  9:1280x960@60  10:1280x800@60  11:1152x864@75  12:1280x720@60  13:1280x720@60  14:1280x720@60  15:1280x720@50  16:1280x720@50  17:1440x576@50  18:1440x576@50  19:1024x768@75  20:1024x768@70  21:1024x768@60  22:1440x480@60  23:1440x480@60  24:1440x480@60  25:1440x480@60  26:832x624@75  27:800x600@75  28:800x600@72  29:800x600@60  30:800x600@56  31:720x576@50  32:720x576@50  33:720x576@50  34:720x480@60  35:720x480@60  36:720x480@60  37:720x480@60  38:720x480@60  39:640x480@75  40:640x480@67  41:640x480@60  42:640x480@60  43:640x480@60  44:720x400@70  45:1600x900@60  46:1368x768@60 
        Geometry: 0,0 1920x1080
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 80% and dimming to 100%
        DDC/CI: allowed
        Color resolution: automatic (10), range: [8; 16] bits per color
        Allow EDR: unsupported
Output: 2 DP-3 22c2291e-16ce-49cf-afff-18850367aba4
        enabled
        connected
        priority 1
        DisplayPort
        replication source:0
        Modes:  47:1920x1080@60!  48:1920x1080@144*  49:1920x1080@120  50:1920x1080@120  51:1920x1080@120  52:1920x1080@100  53:1920x1080@60  54:1920x1080@60  55:1920x1080@50  56:1680x1050@60  57:1280x1024@75  58:1280x1024@60  59:1440x900@60  60:1280x800@60  61:1280x720@60  62:1280x720@60  63:1280x720@60  64:1280x720@50  65:1024x768@120  66:1024x768@100  67:1024x768@75  68:1024x768@70  69:1024x768@60  70:832x624@75  71:800x600@120  72:800x600@100  73:800x600@75  74:800x600@72  75:800x600@60  76:800x600@56  77:720x576@50  78:720x576@50  79:720x480@60  80:720x480@60  81:720x480@60  82:720x480@60  83:640x480@120  84:640x480@100  85:640x480@75  86:640x480@73  87:640x480@67  88:640x480@60  89:640x480@60  90:640x480@60  91:720x400@70  92:1280x1024@144  93:1024x768@144  94:1280x800@144  95:1600x900@60  96:1600x900@144  97:1368x768@60  98:1368x768@144  99:1280x720@144 
        Geometry: 1920,0 1920x1080
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: Automatic
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: EDID
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 80% and dimming to 100%
        DDC/CI: allowed
        Color resolution: automatic (10), range: [8; 16] bits per color
        Allow EDR: unsupported
Output: 3 HDMI-A-1 12c41450-981a-4a0d-aee2-1c525672e813
        enabled
        connected
        priority 3
        HDMI
        replication source:0
        Modes:  100:2560x1440@60*!  101:2560x1440@50  102:1920x1200@60  103:1920x1080@60  104:1920x1080@60  105:1920x1080@60  106:1920x1080@60  107:1920x1080@60  108:1920x1080@50  109:1600x1200@60  110:1680x1050@60  111:1600x900@60  112:1280x1024@60  113:1440x900@60  114:1280x800@60  115:1280x720@60  116:1280x720@60  117:1280x720@60  118:1280x720@60  119:1280x720@60  120:1280x720@50  121:1024x768@60  122:800x600@60  123:720x480@60  124:720x480@60  125:640x480@60  126:640x480@60  127:640x480@60  128:1368x768@60 
        Geometry: 1920,1080 2560x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: disabled
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 20% and dimming to 100%
        DDC/CI: allowed
        Color resolution: automatic (10), range: [8; 16] bits per color
        Allow EDR: unsupported

the last one is the Huion Kamvas 24 plus

[Libinput][9580][109][Huion Tablet_GS2402 Stylus]
MapToWorkspace=false
OutputArea=0,0,1,1.1111111111111112
OutputName=HDMI-A-1
TabletToolPressureCurve=0.212452,0.555152;1,1;
TabletToolRelativeMode=false

and thats the kcminputrc

and no it shows only one tablet device and well the other 3 screens i can select but every aspect seems correctly bound to their respective interfaces

8

Small update, i still have my small traveling graphics tablet (wacom intous s “cth-490/k”)and tried to connect that and that gets assigned to the screen i selected no problem. yet the huion doesnt

9

Hi, I actually made an account today to say that I have a Huion Kamvas 13 and have the same issue. Have had the issue since switching to Plasma 6