So I’ve booted over to Win10 and stripped the EDID information out of there while in the max resolution.
Monitor #1 [Real-time 0x0100]
Model name............... LG ULTRAWIDE
Manufacturer............. LGE
Plug and Play ID......... GSM76F9
Serial number............ 449375
Manufacture date......... 2019, ISO week 1
Filter driver............ None
-------------------------
EDID revision............ 1.3
Input signal type........ Digital
Color bit depth.......... Undefined
Display type............. RGB color
Screen size.............. 800 x 340 mm (34.2 in)
Power management......... Standby, Suspend, Active off/sleep
Extension blocs.......... 1 (Unknown type)
-------------------------
DDC/CI................... Supported
MCCS revison............. 2.1
Display technology....... TFT
Controller............... RealTek 0xFF00
Firmware revision........ 3.6
Firmware flags........... 0x00FF0068
Active power on time..... 32140 hours
Power consumption........ 6.55 kWh
Current frequency........ 83.90kHz, 83.90Hz
Color characteristics
Default color space...... Non-sRGB
Display gamma............ 2.20
Red chromaticity......... Rx 0.651 - Ry 0.332
Green chromaticity....... Gx 0.307 - Gy 0.631
Blue chromaticity........ Bx 0.150 - By 0.060
White point (default).... Wx 0.313 - Wy 0.329
Additional descriptors... None
Timing characteristics
Horizontal scan range.... 90-90kHz
Vertical scan range...... 40-75Hz
Video bandwidth.......... 240MHz
CVT standard............. Not supported
GTF standard............. Not supported
Additional descriptors... None
Preferred timing......... Yes
Native/preferred timing.. 2560x1080p at 60Hz
Modeline............... "2560x1080" 181.250 2560 2608 2640 2720 1080 1083 1093 1111 +hsync -vsync
Detailed timing #1....... 1920x1080p at 60Hz (16:9)
Modeline............... "1920x1080" 148.480 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Standard timings supported
640 x 480p at 60Hz - IBM VGA
640 x 480p at 75Hz - VESA
800 x 600p at 60Hz - VESA
800 x 600p at 75Hz - VESA
832 x 624p at 75Hz - Apple Mac II
1024 x 768p at 60Hz - VESA
1024 x 768p at 75Hz - VESA
1280 x 1024p at 75Hz - VESA
1152 x 870p at 75Hz - Apple Mac II
1152 x 864p at 60Hz - VESA STD
1280 x 1024p at 60Hz - VESA STD
1280 x 720p at 60Hz - VESA STD
1600 x 900p at 60Hz - VESA STD
1680 x 1050p at 60Hz - VESA STD
1920 x 1080p at 60Hz - VESA STD
1280 x 800p at 60Hz - VESA STD
1920 x 1080p at 75Hz - VESA STD
Report information
Date generated........... 10/26/2024
Software revision........ 2.90.0.996
Data source.............. Real-time 0x0100
Operating system......... 6.2.9200.2
Raw data
00,FF,FF,FF,FF,FF,FF,00,1E,6D,F9,76,5F,DB,06,00,01,1D,01,03,80,50,22,78,EA,CA,95,A6,55,4E,A1,26,
0F,50,54,25,6B,80,71,40,81,80,81,C0,A9,C0,B3,00,D1,C0,81,00,D1,CF,CD,46,00,A0,A0,38,1F,40,30,20,
3A,00,1E,4E,31,00,00,1A,00,3A,80,18,71,38,2D,40,58,2C,45,00,13,2A,21,00,00,1E,00,00,00,FD,00,28,
4B,5A,5A,18,00,0A,20,20,20,20,20,20,00,00,00,FC,00,4C,47,20,55,4C,54,52,41,57,49,44,45,0A,01,9A
---------------------------
The EDID is virtually identical except for a minor difference in the CTA-861 extension block.
$ diff -y lin.out win.out
edid-decode (hex): edid-decode (hex):
00 ff ff ff ff ff ff 00 1e 6d f9 76 5f db 06 00 00 ff ff ff ff ff ff 00 1e 6d f9 76 5f db 06 00
01 1d 01 03 80 50 22 78 ea ca 95 a6 55 4e a1 26 01 1d 01 03 80 50 22 78 ea ca 95 a6 55 4e a1 26
0f 50 54 25 6b 80 71 40 81 80 81 c0 a9 c0 b3 00 0f 50 54 25 6b 80 71 40 81 80 81 c0 a9 c0 b3 00
d1 c0 81 00 d1 cf cd 46 00 a0 a0 38 1f 40 30 20 d1 c0 81 00 d1 cf cd 46 00 a0 a0 38 1f 40 30 20
3a 00 1e 4e 31 00 00 1a 00 3a 80 18 71 38 2d 40 3a 00 1e 4e 31 00 00 1a 00 3a 80 18 71 38 2d 40
58 2c 45 00 13 2a 21 00 00 1e 00 00 00 fd 00 28 58 2c 45 00 13 2a 21 00 00 1e 00 00 00 fd 00 28
4b 5a 5a 18 00 0a 20 20 20 20 20 20 00 00 00 fc 4b 5a 5a 18 00 0a 20 20 20 20 20 20 00 00 00 fc
00 4c 47 20 55 4c 54 52 41 57 49 44 45 0a 01 9a 00 4c 47 20 55 4c 54 52 41 57 49 44 45 0a 01 9a
02 03 23 f1 23 09 07 07 47 10 04 03 01 1f 13 12 02 03 23 f1 23 09 07 07 47 10 04 03 01 1f 13 12
83 01 00 00 65 03 0c 00 20 00 68 1a 00 00 01 01 | 83 01 00 00 65 03 0c 00 10 00 68 1a 00 00 01 01
28 4b 00 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 1e 28 4b 00 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 1e
4e 31 00 00 18 29 59 00 a0 a0 38 27 40 30 20 3a 4e 31 00 00 18 29 59 00 a0 a0 38 27 40 30 20 3a
00 1e 4e 31 00 00 1a 00 00 00 00 00 00 00 00 00 00 1e 4e 31 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 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 93 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a3
---------------- ----------------
Block 0, Base EDID: Block 0, Base EDID:
EDID Structure Version & Revision: 1.3 EDID Structure Version & Revision: 1.3
Vendor & Product Identification: Vendor & Product Identification:
Manufacturer: GSM Manufacturer: GSM
Model: 30457 Model: 30457
Serial Number: 449375 (0x0006db5f) Serial Number: 449375 (0x0006db5f)
Made in: week 1 of 2019 Made in: week 1 of 2019
Basic Display Parameters & Features: Basic Display Parameters & Features:
Digital display Digital display
Maximum image size: 80 cm x 34 cm Maximum image size: 80 cm x 34 cm
Gamma: 2.20 Gamma: 2.20
DPMS levels: Standby Suspend Off DPMS levels: Standby Suspend Off
RGB color display RGB color display
First detailed timing is the preferred timing First detailed timing is the preferred timing
Color Characteristics: Color Characteristics:
Red : 0.6513, 0.3320 Red : 0.6513, 0.3320
Green: 0.3066, 0.6308 Green: 0.3066, 0.6308
Blue : 0.1503, 0.0595 Blue : 0.1503, 0.0595
White: 0.3134, 0.3291 White: 0.3134, 0.3291
Established Timings I & II: Established Timings I & II:
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz
DMT 0x06: 640x480 75.000000 Hz 4:3 37.500 kHz DMT 0x06: 640x480 75.000000 Hz 4:3 37.500 kHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz
DMT 0x0b: 800x600 75.000000 Hz 4:3 46.875 kHz DMT 0x0b: 800x600 75.000000 Hz 4:3 46.875 kHz
Apple : 832x624 74.551266 Hz 4:3 49.726 kHz Apple : 832x624 74.551266 Hz 4:3 49.726 kHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz
DMT 0x12: 1024x768 75.028582 Hz 4:3 60.023 kHz DMT 0x12: 1024x768 75.028582 Hz 4:3 60.023 kHz
DMT 0x24: 1280x1024 75.024675 Hz 5:4 79.976 kHz DMT 0x24: 1280x1024 75.024675 Hz 5:4 79.976 kHz
Apple : 1152x870 75.061550 Hz 192:145 68.681 kHz Apple : 1152x870 75.061550 Hz 192:145 68.681 kHz
Standard Timings: Standard Timings:
GTF : 1152x864 60.000000 Hz 4:3 53.700 kHz GTF : 1152x864 60.000000 Hz 4:3 53.700 kHz
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz
DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz
DMT 0x53: 1600x900 60.000000 Hz 16:9 60.000 kHz DMT 0x53: 1600x900 60.000000 Hz 16:9 60.000 kHz
DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz
DMT 0x52: 1920x1080 60.000000 Hz 16:9 67.500 kHz DMT 0x52: 1920x1080 60.000000 Hz 16:9 67.500 kHz
DMT 0x1c: 1280x800 59.810326 Hz 16:10 49.702 kHz DMT 0x1c: 1280x800 59.810326 Hz 16:10 49.702 kHz
GTF : 1920x1080 75.000068 Hz 16:9 84.600 kHz GTF : 1920x1080 75.000068 Hz 16:9 84.600 kHz
Detailed Timing Descriptors: Detailed Timing Descriptors:
DTD 1: 2560x1080 59.978424 Hz 64:27 66.636 kHz DTD 1: 2560x1080 59.978424 Hz 64:27 66.636 kHz
Hfront 48 Hsync 32 Hback 80 Hpol P Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 10 Vback 18 Vpol N Vfront 3 Vsync 10 Vback 18 Vpol N
DTD 2: 1920x1080 59.991919 Hz 16:9 67.491 kHz DTD 2: 1920x1080 59.991919 Hz 16:9 67.491 kHz
Hfront 88 Hsync 44 Hback 148 Hpol P Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P Vfront 4 Vsync 5 Vback 36 Vpol P
Display Range Limits: Display Range Limits:
Monitor ranges (GTF): 40-75 Hz V, 90-90 kHz H, max dotc Monitor ranges (GTF): 40-75 Hz V, 90-90 kHz H, max dotc
Display Product Name: 'LG ULTRAWIDE' Display Product Name: 'LG ULTRAWIDE'
Extension blocks: 1 Extension blocks: 1
Checksum: 0x9a Checksum: 0x9a
---------------- ----------------
Block 1, CTA-861 Extension Block: Block 1, CTA-861 Extension Block:
Revision: 3 Revision: 3
Underscans IT Video Formats by default Underscans IT Video Formats by default
Basic audio support Basic audio support
Supports YCbCr 4:4:4 Supports YCbCr 4:4:4
Supports YCbCr 4:2:2 Supports YCbCr 4:2:2
Native detailed modes: 1 Native detailed modes: 1
Audio Data Block: Audio Data Block:
Linear PCM: Linear PCM:
Max channels: 2 Max channels: 2
Supported sample rates (kHz): 48 44.1 32 Supported sample rates (kHz): 48 44.1 32
Supported sample sizes (bits): 24 20 16 Supported sample sizes (bits): 24 20 16
Video Data Block: Video Data Block:
VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz
VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz
VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz
VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz
VIC 19: 1280x720 50.000000 Hz 16:9 37.500 kHz VIC 19: 1280x720 50.000000 Hz 16:9 37.500 kHz
VIC 18: 720x576 50.000000 Hz 16:9 31.250 kHz VIC 18: 720x576 50.000000 Hz 16:9 31.250 kHz
Speaker Allocation Data Block: Speaker Allocation Data Block:
FL/FR - Front Left/Right FL/FR - Front Left/Right
Vendor-Specific Data Block (HDMI), OUI 00-0C-03: Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
Source physical address: 2.0.0.0 | Source physical address: 1.0.0.0
Vendor-Specific Data Block (AMD), OUI 00-00-1A: Vendor-Specific Data Block (AMD), OUI 00-00-1A:
Version: 1 Version: 1
Feature Caps: 0x01 Feature Caps: 0x01
Minimum Refresh Rate: 40 Hz Minimum Refresh Rate: 40 Hz
Maximum Refresh Rate: 75 Hz Maximum Refresh Rate: 75 Hz
Flags 1.x: 0x00 Flags 1.x: 0x00
Detailed Timing Descriptors: Detailed Timing Descriptors:
DTD 3: 720x480 59.940060 Hz 3:2 31.469 kHz DTD 3: 720x480 59.940060 Hz 3:2 31.469 kHz
Hfront 16 Hsync 62 Hback 60 Hpol N Hfront 16 Hsync 62 Hback 60 Hpol N
Vfront 9 Vsync 6 Vback 30 Vpol N Vfront 9 Vsync 6 Vback 30 Vpol N
DTD 4: 2560x1080 74.991458 Hz 64:27 83.915 kHz DTD 4: 2560x1080 74.991458 Hz 64:27 83.915 kHz
Hfront 48 Hsync 32 Hback 80 Hpol P Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 10 Vback 26 Vpol N Vfront 3 Vsync 10 Vback 26 Vpol N
Checksum: 0x93 Unused space in Extension Block: 56 bytes | Checksum: 0xa3 Unused space in Extension Block: 56 bytes
Force-loading that EDID via the kernel command line options has no effect.
In all of these cases, when I attempt to force the resolution via new modes in xrandr
, the common error I get in /var/log/Xorg.log
is the following:
[ ] (II) modeset(0): Allocate new frame buffer 2560x1080 stride
[ ] (EE) modeset(0): failed to set mode: No such file or directory
[ ] (II) modeset(0): EDID vendor "GSM", prod id 30457
First line is trying to apply the newly added mode. Third line is Xorg re-probing the DDC for resolutions and falling back to a default.
I’m struggling for new avenues to explore here.