$ for OUT in /sys/class/drm/card*; do echo $OUT; edid-decode $OUT/edid; echo "================="; done /sys/class/drm/card0 /sys/class/drm/card0/edid: No such file or directory ================= /sys/class/drm/card0-DP-1 EDID of '/sys/class/drm/card0-DP-1/edid' was empty. ================= /sys/class/drm/card0-DP-2 EDID of '/sys/class/drm/card0-DP-2/edid' was empty. ================= /sys/class/drm/card0-HDMI-A-1 EDID of '/sys/class/drm/card0-HDMI-A-1/edid' was empty. ================= /sys/class/drm/card0-HDMI-A-2 EDID of '/sys/class/drm/card0-HDMI-A-2/edid' was empty. ================= /sys/class/drm/card0-VGA-1 EDID of '/sys/class/drm/card0-VGA-1/edid' was empty. ================= /sys/class/drm/card1 /sys/class/drm/card1/edid: No such file or directory ================= /sys/class/drm/card1-DP-3 EDID of '/sys/class/drm/card1-DP-3/edid' was empty. ================= /sys/class/drm/card1-HDMI-A-3 edid-decode (hex): 00 ff ff ff ff ff ff 00 36 72 18 04 18 04 23 20 17 1f 01 03 80 1b 0c 78 ea 1e c5 ae 4f 34 b1 26 0e 50 54 00 00 00 81 c0 01 01 01 01 01 01 01 01 01 01 01 01 01 01 3c 2b 80 ba 70 5c 10 30 30 20 35 00 16 7c 10 00 00 1e 00 00 00 ff 00 4c 31 2d 32 30 32 33 30 34 31 38 0a 20 00 00 00 fc 00 4c 31 0a 20 20 20 20 20 20 20 20 20 20 00 00 00 fd 00 38 4c 1e 51 11 00 0a 20 20 20 20 20 20 01 cc 02 03 1a f1 41 84 23 09 7f 07 67 03 0c 00 10 00 38 2d 83 01 00 00 e3 05 03 01 01 1d 80 18 71 1c 16 20 58 2c 25 00 06 44 21 00 00 9e 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 f3 ---------------- Block 0, Base EDID: EDID Structure Version & Revision: 1.3 Vendor & Product Identification: Manufacturer: MSR Model: 1048 Serial Number: 539165720 (0x20230418) Made in: week 23 of 2021 Basic Display Parameters & Features: Digital display Maximum image size: 27 cm x 12 cm Gamma: 2.20 DPMS levels: Standby Suspend Off RGB color display First detailed timing is the preferred timing Color Characteristics: Red : 0.6796, 0.3095 Green: 0.2060, 0.6933 Blue : 0.1513, 0.0546 White: 0.3134, 0.3291 Established Timings I & II: none Standard Timings: DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz Detailed Timing Descriptors: DTD 1: 1920x860 59.993842 Hz 96:43 52.555 kHz 110.680000 MHz (278 mm x 124 mm) Hfront 48 Hsync 32 Hback 106 Hpol P Vfront 3 Vsync 5 Vback 8 Vpol P Display Product Serial Number: 'L1-20230418' Display Product Name: 'L1' Display Range Limits: Monitor ranges (GTF): 56-76 Hz V, 30-81 kHz H, max dotclock 170 MHz Extension blocks: 1 Checksum: 0xcc ---------------- 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 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz (native) 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 Vendor-Specific Data Block (HDMI), OUI 00-0C-03: Source physical address: 1.0.0.0 DC_36bit DC_30bit DC_Y444 Maximum TMDS clock: 225 MHz Speaker Allocation Data Block: FL/FR - Front Left/Right Colorimetry Data Block: xvYCC601 xvYCC709 Gamut Boundary Description Metadata Profile P0 Detailed Timing Descriptors: DTD 2: 1920x1080i 60.000000 Hz 16:9 33.750 kHz 74.250000 MHz (518 mm x 324 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 Checksum: 0xf3 Unused space in Extension Block: 83 bytes ================= /sys/class/drm/card1-HDMI-A-4 EDID of '/sys/class/drm/card1-HDMI-A-4/edid' was empty. =================