A few days ago plasma stopped detecting the correct resolution for my second monitor after waking up from sleep. It is an LG Ultrawide and its resolution is supposed to be 2560x1080, but now it doesn’t show up in system settings or kscreen-doctor -o or xrandr (the monitor in question is HDMI-A-1).
System settings:
kscreen-doctor -o:
Output: 1 HDMI-A-1 9c3b8b4e-121e-4d6f-9d0c-023bb94a7d83
enabled
connected
priority 2
HDMI
replication source:0
Modes: 1:1920x1080@60.00*! 2:1920x1080@59.94 3:1920x1080@50.00 4:1680x1050@59.95 5:1600x900@60.00 6:1280x1024@75.03 7:1280x1024@60.02 8:1152x864@75.00 9:1280x720@60.00 10:1280x720@59.94 11:1280x720@50.00 12:1024x768@75.03 13:1024x768@60.00 14:800x600@75.00 15:800x600@60.32 16:720x576@50.00 17:720x480@59.94 18:640x480@75.00 19:640x480@59.94 20:640x480@59.93
Geometry: 2134,120 1920x1080
Scale: 1
Rotation: 1
Overscan: 0
Vrr: incapable
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 100% and dimming to 100%
DDC/CI: allowed
Color resolution: unknown
Allow EDR: unsupported
Sharpness control: unsupported
Output: 2 DP-2 dad4ad7e-a371-46a3-bae4-ed117d193d78
enabled
connected
priority 1
DisplayPort
replication source:0
Modes: 21:2560x1440@120.00! 22:2560x1440@360.00* 23:2560x1440@239.96 24:2560x1440@60.00 25:1920x1080@359.99 26:1920x1080@239.93 27:1920x1080@119.88 28:1920x1080@59.94 29:1680x1050@59.95 30:1600x900@60.00 31:1280x1024@60.02 32:1440x900@59.89 33:1280x800@59.81 34:1280x720@60.00 35:1280x720@59.94 36:1024x768@60.00 37:800x600@60.32 38:720x480@59.94 39:640x480@59.94
Geometry: 0,0 2134x1200
Scale: 1.2
Rotation: 1
Overscan: 0
Vrr: Never
RgbRange: unknown
HDR: enabled
SDR brightness: 380 nits
SDR gamut wideness: 100%
Peak brightness: 380 nits, overridden with: 380 nits
Max average brightness: 254 nits
Min brightness: 0 nits
Wide Color Gamut: enabled
ICC profile: none
Color profile source: sRGB
Color power preference: prefer efficiency and performance
Brightness control: supported, set to 100% and dimming to 100%
DDC/CI: allowed
Color resolution: unknown
Allow EDR: unsupported
Sharpness control: unsupported
xrandr:
Screen 0: minimum 16 x 16, current 4865 x 1440, maximum 32767 x 32767
HDMI-A-1 connected 2304x1296+2561+144 (normal left inverted right x axis y axis) 673mm x 284mm
2304x1296 59.92*+
1600x1200 59.87
1440x1080 59.99
1400x1050 59.98
1280x1024 59.89
1280x960 59.94
1152x864 59.96
1024x768 59.92
800x600 59.86
640x480 59.38
320x240 59.29
1920x1200 59.88
1680x1050 59.95
1440x900 59.89
1280x800 59.81
1152x720 59.97
960x600 59.63
928x580 59.88
800x500 59.50
768x480 59.90
720x480 59.71
640x400 59.95
320x200 58.14
2048x1152 59.90
1920x1080 59.96
1600x900 59.95
1368x768 59.88
1280x720 59.86
1024x576 59.90
864x486 59.92
720x400 59.27
640x350 59.28
DP-2 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
2560x1440 359.84*+
1920x1440 359.83
1600x1200 359.93
1440x1080 359.81
1400x1050 359.90
1280x1024 359.77
1280x960 359.90
1152x864 359.59
1024x768 359.67
800x600 359.75
640x480 359.53
320x240 359.06
1920x1200 359.99
1680x1050 359.98
1440x900 359.92
1280x800 359.63
1152x720 359.66
960x600 359.90
928x580 359.80
800x500 359.35
768x480 359.29
720x480 359.48
640x400 359.21
320x200 357.70
2048x1152 359.74
1920x1080 359.83
1600x900 359.90
1368x768 359.62
1280x720 359.75
1024x576 359.88
864x486 359.63
720x400 359.24
640x350 358.82
Here is some system information:
- CPU: AMD Ryzen 9 5900x
- GPU: NVIDIA GeForce RTX 3090 (‘nvidia’ drivers - up to date)
- OS: Arch Linux x86_64
- Kernel: Linux 6.17.7-arch1-1
- KDE Plasma Version: 6.5.2
- Graphics Platform: Wayland
So far i have tried:
- Disconnecting and reconnecting the HDMI cable (as well as restarting while the monitor was disconnected)
- Running the following:
xrandr --newmode "2560x1080" 175.982 2560 2568 2600 2640 1080 1097 1105 1111 +HSync -VSync
xrandr --addmode HDMI-A-1 "2560x1080"
xrandr --output HDMI-A-1 --mode "2560x1080"
But i get an error:
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 21 (RRSetCrtcConfig)
Value in failed request: 0xa01
Serial number of failed request: 28
Current serial number in output stream: 28
Not sure if I’m doing something wrong or if xrandr is only for X11 as that wasn’t very clear to me.
- Checking to see if the monitor’s EDID is corrupted, but it seemed fine to me (although I could be wrong):
edid-decode (hex):
00 ff ff ff ff ff ff 00 1e 6d f1 59 b9 bb 05 00
04 1c 01 03 80 43 1c 78 ea ca 95 a6 55 4e a1 26
0f 50 54 a5 4b 80 71 4f 81 80 81 c0 a9 c0 b3 00
01 01 01 01 01 01 7e 48 00 e0 a0 38 1f 40 40 40
3a 00 a1 1c 21 00 00 18 02 3a 80 18 71 38 2d 40
58 2c 45 00 a1 1c 21 00 00 1e 00 00 00 fc 00 4c
47 20 55 4c 54 52 41 57 49 44 45 0a 00 00 00 fd
00 38 4b 1e 5a 18 00 0a 20 20 20 20 20 20 01 1c
02 03 1c f1 49 90 04 03 14 12 05 1f 01 13 23 09
07 07 83 01 00 00 65 03 0c 00 20 00 02 3a 80 18
71 38 2d 40 58 2c 45 00 56 51 21 00 00 1e 01 1d
80 18 71 1c 16 20 58 2c 25 00 56 51 21 00 00 9e
01 1d 00 72 51 d0 1e 20 6e 28 55 00 56 51 21 00
00 1e 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 56 51
21 00 00 18 00 00 00 ff 00 38 30 34 4e 54 48 4d
42 31 37 33 37 0a 00 00 00 00 00 00 00 00 00 9c
----------------
Block 0, Base EDID:
EDID Structure Version & Revision: 1.3
Vendor & Product Identification:
Manufacturer: GSM
Model: 23025
Serial Number: 375737 (0x0005bbb9)
Made in: week 4 of 2018
Basic Display Parameters & Features:
Digital display
Maximum image size: 67 cm x 28 cm
Gamma: 2.20
DPMS levels: Standby Suspend Off
RGB color display
First detailed timing is the preferred timing
Color Characteristics:
Red : 0.6513, 0.3320
Green: 0.3066, 0.6308
Blue : 0.1503, 0.0595
White: 0.3134, 0.3291
Established Timings I & II:
IBM : 720x400 70.081663 Hz 9:5 31.467 kHz 28.320000 MHz
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
DMT 0x06: 640x480 75.000000 Hz 4:3 37.500 kHz 31.500000 MHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x0b: 800x600 75.000000 Hz 4:3 46.875 kHz 49.500000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
DMT 0x12: 1024x768 75.028582 Hz 4:3 60.023 kHz 78.750000 MHz
DMT 0x24: 1280x1024 75.024675 Hz 5:4 79.976 kHz 135.000000 MHz
Apple : 1152x870 75.061550 Hz 192:145 68.681 kHz 100.000000 MHz
Standard Timings:
DMT 0x15: 1152x864 75.000000 Hz 4:3 67.500 kHz 108.000000 MHz
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 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)
DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz 146.250000 MHz
Detailed Timing Descriptors:
DTD 1: 2560x1080 59.999534 Hz 64:27 66.659 kHz 185.580000 MHz (673 mm x 284 mm)
Hfront 64 Hsync 64 Hback 96 Hpol N
Vfront 3 Vsync 10 Vback 18 Vpol N
DTD 2: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (673 mm x 284 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
Display Product Name: 'LG ULTRAWIDE'
Display Range Limits:
Monitor ranges (GTF): 56-75 Hz V, 30-90 kHz H, max dotclock 240 MHz
Extension blocks: 1
Checksum: 0x1c
----------------
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: 1
Video Data Block:
VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (native)
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz 27.000000 MHz
VIC 20: 1920x1080i 50.000000 Hz 16:9 28.125 kHz 74.250000 MHz
VIC 18: 720x576 50.000000 Hz 16:9 31.250 kHz 27.000000 MHz
VIC 5: 1920x1080i 60.000000 Hz 16:9 33.750 kHz 74.250000 MHz
VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz 148.500000 MHz
VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
VIC 19: 1280x720 50.000000 Hz 16:9 37.500 kHz 74.250000 MHz
Audio Data Block:
Linear PCM:
Max channels: 2
Supported sample rates (kHz): 48 44.1 32
Supported sample sizes (bits): 24 20 16
Speaker Allocation Data Block:
FL/FR - Front Left/Right
Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
Source physical address: 2.0.0.0
Detailed Timing Descriptors:
DTD 3: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (598 mm x 337 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
DTD 4: 1920x1080i 60.000000 Hz 16:9 33.750 kHz 74.250000 MHz (598 mm x 337 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 15 Vpol P Vfront +0.5 Odd Field
Vfront 2 Vsync 5 Vback 15 Vpol P Vback +0.5 Even Field
DTD 5: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz (598 mm x 337 mm)
Hfront 110 Hsync 40 Hback 220 Hpol P
Vfront 5 Vsync 5 Vback 20 Vpol P
DTD 6: 720x480 59.940060 Hz 3:2 31.469 kHz 27.000000 MHz (598 mm x 337 mm)
Hfront 16 Hsync 62 Hback 60 Hpol N
Vfront 9 Vsync 6 Vback 30 Vpol N
Display Product Serial Number: '804NTHMB1737'
Checksum: 0x9c Unused space in Extension Block: 9 bytes
I haven’t tried using it with a different computer yet because that would be quite difficult, but doable if the information provided is insufficient. Searching for a fix online hasn’t yielded anything too useful unfortunately, but maybe I just didn’t look hard enough. Please help me.