Hello, I switched from Windows to Arch ( CachyOS ) recently and am having issues setting up my monitor refresh rate. It supports 4k up to 144hz, but KDE enables only 60hz, I had no such issue with Windows.
❯ kscreen-doctor -o
Output: 1 DP-3
enabled
connected
priority 1
DisplayPort
Modes: 1:3840x2160@60*! 2:3840x2160@60 3:3840x2160@60 4:3840x2160@50 5:3840x2160@30 6:3840x2160@30 7:3840x2160@25 8:3840x2160@24 9:3840x2160@24 10:2560x1440@60 11:1920x1200@60 12:1920x1080@60 13:1920x1080@60 14:1920x1080@60 15:1920x1080@60 16:1920x1080@60 17:1920x1080@50 18:1920x1080@30 19:1920x1080@30 20:1920x1080@25 21:1920x1080@24 22:1920x1080@24 23:1600x1200@60 24:1680x1050@60 25:1680x945@60 26:1600x900@60 27:1280x1024@60 28:1440x900@60 29:1280x800@60 30:1280x720@60 31:1280x720@60 32:1280x720@60 33:1280x720@50 34:1280x720@30 35:1280x720@30 36:1280x720@25 37:1280x720@24 38:1280x720@24 39:1024x768@60 40:800x600@60 41:720x480@60 42:720x480@60 43:720x480@60 44:720x480@60 45:640x480@60 46:640x480@60 47:640x480@60 48:1600x1200@60 49:1280x1024@60 50:1024x768@60 51:2560x1600@60 52:1920x1200@60 53:1280x800@60 54:3840x2160@60 55:3200x1800@60 56:2880x1620@60 57:2560x1440@60 58:1920x1080@60 59:1600x900@60 60:1368x768@60 61:1280x720@60
Geometry: 0,0 2328x1310
Scale: 1.65
Rotation: 1
Overscan: 0
Vrr: Automatic
RgbRange: unknown
HDR: disabled
Wide Color Gamut: disabled
ICC profile: none
Color profile source: sRGB
Color power preference: prefer accuracy
Brightness control: supported, set to 100% and dimming to 100%
It shows all the modes from the Base EDID block, but the 144hz configuration is set in the Block 2, Display ID extension block:
❯ sudo edid-decode < /sys/devices/pci0000:00/0000:00:03.1/0000:07:00.0/0000:08:00.0/0000:09:00.0/drm/card0/card0-DP-3/edid
edid-decode (hex):
00 ff ff ff ff ff ff 00 5c 2d 00 28 00 00 00 00
1f 21 01 04 b5 3e 23 78 2f 87 e5 a4 56 50 9e 26
0d 50 54 21 08 00 d1 c0 b3 c0 81 c0 a9 c0 01 01
01 01 01 01 01 01 4d d0 00 a0 f0 70 3e 80 30 20
35 00 6c 5d 21 00 00 1a 00 00 00 fc 00 43 54 53
50 32 38 2d 42 4c 30 31 0a 20 00 00 00 fd 00 30
96 ff ff 87 01 0a 20 20 20 20 20 20 00 00 00 ff
00 0a 20 20 20 20 20 20 20 20 20 20 20 20 02 61
02 03 2e f2 53 61 01 02 03 04 10 13 1f 20 21 22
3c 3d 3e 4c 5d 5e 5f 60 e2 00 d5 23 09 7f 07 83
01 00 00 e3 05 c0 00 e6 06 05 01 62 62 00 02 3a
80 18 71 38 2d 40 58 2c 25 00 6c 5d 21 00 00 1a
56 5e 00 a0 a0 a0 29 50 30 20 35 00 6c 5d 21 00
00 1a 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 83
70 12 6a 02 00 03 00 3c 87 58 01 88 ff 0e 9f 00
2f 80 1f 00 6f 08 2c 00 02 00 04 00 6f 9d 01 08
ff 0e 9f 00 2f 80 1f 00 6f 08 2c 00 02 00 04 00
a1 ed 01 08 ff 0e b3 00 2f 80 1f 00 6f 08 16 00
01 00 01 00 01 03 0c 80 17 49 0d 00 0f 70 08 00
78 4d 00 07 00 0a 08 81 00 08 04 00 04 02 10 00
81 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 42 90
----------------
Block 0, Base EDID:
EDID Structure Version & Revision: 1.4
Vendor & Product Identification:
Manufacturer: WAM
Model: 10240
Made in: week 31 of 2023
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 10
DisplayPort interface
Maximum image size: 62 cm x 35 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:4:4
Default (sRGB) color space is primary color space
First detailed timing includes the native pixel format and preferred refresh rate
Display supports continuous frequencies
Color Characteristics:
Red : 0.6425, 0.3359
Green: 0.3134, 0.6201
Blue : 0.1513, 0.0527
White: 0.3134, 0.3291
Established Timings I & II:
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
Standard Timings:
DMT 0x52: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
GTF : 1680x945 59.999909 Hz 16:9 58.680 kHz 131.443000 MHz
DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
DMT 0x53: 1600x900 60.000000 Hz 16:9 60.000 kHz 108.000000 MHz (RB)
Detailed Timing Descriptors:
DTD 1: 3840x2160 59.996625 Hz 16:9 133.312 kHz 533.250000 MHz (620 mm x 349 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 54 Vpol N
Display Product Name: 'CTSP28-BL01'
Display Range Limits:
Monitor ranges (Range Limits Only): 48-150 Hz V, 255-255 kHz H, max dotclock 1350 MHz
Display Product Serial Number: ''
Extension blocks: 2
Checksum: 0x61
----------------
Block 1, CTA-861 Extension Block:
Revision: 3
Underscans IT Video Formats by default
Basic audio support
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
Native detailed modes: 2
Video Data Block:
VIC 97: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz
VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
VIC 2: 720x480 59.940060 Hz 4:3 31.469 kHz 27.000000 MHz
VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz 27.000000 MHz
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
VIC 19: 1280x720 50.000000 Hz 16:9 37.500 kHz 74.250000 MHz
VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz 148.500000 MHz
VIC 32: 1920x1080 24.000000 Hz 16:9 27.000 kHz 74.250000 MHz
VIC 33: 1920x1080 25.000000 Hz 16:9 28.125 kHz 74.250000 MHz
VIC 34: 1920x1080 30.000000 Hz 16:9 33.750 kHz 74.250000 MHz
VIC 60: 1280x720 24.000000 Hz 16:9 18.000 kHz 59.400000 MHz
VIC 61: 1280x720 25.000000 Hz 16:9 18.750 kHz 74.250000 MHz
VIC 62: 1280x720 30.000000 Hz 16:9 22.500 kHz 74.250000 MHz
VIC 76: 1920x1080 60.000000 Hz 64:27 67.500 kHz 148.500000 MHz
VIC 93: 3840x2160 24.000000 Hz 16:9 54.000 kHz 297.000000 MHz
VIC 94: 3840x2160 25.000000 Hz 16:9 56.250 kHz 297.000000 MHz
VIC 95: 3840x2160 30.000000 Hz 16:9 67.500 kHz 297.000000 MHz
VIC 96: 3840x2160 50.000000 Hz 16:9 112.500 kHz 594.000000 MHz
Video Capability Data Block:
YCbCr quantization: Selectable (via AVI YQ)
RGB quantization: Selectable (via AVI Q)
PT scan behavior: Always Overscanned
IT scan behavior: Always Overscanned
CE scan behavior: Always Overscanned
Audio Data Block:
Linear PCM:
Max channels: 2
Supported sample rates (kHz): 192 176.4 96 88.2 48 44.1 32
Supported sample sizes (bits): 24 20 16
Speaker Allocation Data Block:
FL/FR - Front Left/Right
Colorimetry Data Block:
BT2020YCC
BT2020RGB
HDR Static Metadata Data Block:
Electro optical transfer functions:
Traditional gamma - SDR luminance range
SMPTE ST2084
Supported static metadata descriptors:
Static metadata type 1
Desired content max luminance: 98 (417.710 cd/m^2)
Desired content max frame-average luminance: 98 (417.710 cd/m^2)
Desired content min luminance: 0 (0.000 cd/m^2)
Detailed Timing Descriptors:
DTD 2: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (620 mm x 349 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 38 Vpol N
DTD 3: 2560x1440 59.950550 Hz 16:9 88.787 kHz 241.500000 MHz (620 mm x 349 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 33 Vpol N
Checksum: 0x83 Unused space in Extension Block: 45 bytes
----------------
Block 2, DisplayID Extension Block:
Version: 1.2
Extension Count: 0
Display Product Type: Display panel or other transducer, LCD or PDP module, etc.
Video Timing Modes Type 1 - Detailed Timings Data Block:
DTD: 3840x2160 100.000000 Hz 0:0 220.500 kHz 882.000000 MHz (aspect undefined, no 3D stereo, preferred)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 37 Vpol N
DTD: 3840x2160 120.000000 Hz 0:0 264.600 kHz 1058.400000 MHz (aspect undefined, no 3D stereo)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 37 Vpol N
DTD: 3840x2160 144.000565 Hz 0:0 314.353 kHz 1263.700000 MHz (aspect undefined, no 3D stereo)
Hfront 48 Hsync 32 Hback 100 Hpol P
Vfront 2 Vsync 2 Vback 19 Vpol N
Display Parameters Data Block (0x01):
Image size: 601.6 mm x 340.1 mm
Display native pixel format: 3840x2160
Gamma: 2.20
Aspect ratio: 1.77
Dynamic bpc native: 1
Dynamic bpc overall: 1
Supported Timing Modes Type 1 - VESA DMT Timings Data Block:
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
DMT 0x1c: 1280x800 59.810326 Hz 16:10 49.702 kHz 83.500000 MHz
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 MHz
DMT 0x33: 1600x1200 60.000000 Hz 4:3 75.000 kHz 162.000000 MHz
DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz 146.250000 MHz
DMT 0x45: 1920x1200 59.884600 Hz 16:10 74.556 kHz 193.250000 MHz
CTA-861 DisplayID Data Block:
Unknown CTA-861 Data Block (tag 0x00, length 0):
Unknown CTA-861 Data Block (tag 0x00, length 0):
Unknown CTA-861 Data Block (tag 0x00, length 0):
Unknown CTA-861 Data Block (tag 0x00, length 0):
Checksum: 0x00 (should be 0x42)
Checksum: 0x90 Unused space in Extension Block: 15 bytes
Not sure if relevant ( or if expected ) but HDR can be enabled but it is defined in the Block 1, CTA-861 Extension Block, which doesn’t define the 144hz support, it is only done so in Block 1, DisplayID Extension Block`.
Is something up with the EDID block? If so, is there a way I can “overwrite” fixing the issue? Or is this EDID simply not supported in wayland/kde ?