Here's the decoded EDID of the affected monitor on HDMI-1-0: EDID version: 1.3 Manufacturer: BNQ Model 30926 Serial Number 21573 Made in week 3 of 2015 Digital display Maximum image size: 53 cm x 30 cm Gamma: 2.20 DPMS levels: Off RGB color display Default (sRGB) color space is primary color space First detailed timing is preferred timing Color Characteristics Red: 0.6416, 0.3339 Green: 0.3339, 0.6240 Blue: 0.1523, 0.0498 White: 0.3134, 0.3291 Established Timings I & II 720x400 70.082 Hz 9:5 31.467 kHz 28.320 MHz (IBM) 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz (DMT) 640x480 75.000 Hz 4:3 37.500 kHz 31.500 MHz (DMT) 800x600 60.317 Hz 4:3 37.879 kHz 40.000 MHz (DMT) 800x600 75.000 Hz 4:3 46.875 kHz 49.500 MHz (DMT) 832x624 74.551 Hz 4:3 49.726 kHz 57.284 MHz (Apple) 1024x768 60.004 Hz 4:3 48.363 kHz 65.000 MHz (DMT) 1024x768 75.029 Hz 4:3 60.023 kHz 78.750 MHz (DMT) 1280x1024 75.025 Hz 5:4 79.976 kHz 135.000 MHz (DMT) 1152x870 75.062 Hz 192:145 68.681 kHz 100.000 MHz (Apple) Standard Timings 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (DMT) 1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz (DMT) 1280x800 59.810 Hz 16:10 49.702 kHz 83.500 MHz (DMT) 1280x1024 60.020 Hz 5:4 63.981 kHz 108.000 MHz (DMT) 1600x900 60.000 Hz 16:9 60.000 kHz 108.000 MHz (DMT, RB) 1680x1050 59.954 Hz 16:10 65.290 kHz 146.250 MHz (DMT) Detailed mode: Clock 148.500 MHz, 531 mm x 299 mm 1920 2008 2052 2200 ( 88 44 148) 1080 1084 1089 1125 ( 4 5 36) +hsync +vsync VertFreq: 60.000 Hz, HorFreq: 67.500 kHz Display Product Serial Number: Y1F02711SL0 Display Range Limits Monitor ranges (GTF): 50-76 Hz V, 30-83 kHz H, max dotclock 170 MHz Display Product Name: BenQ GL2460 Has 1 extension block Checksum: 0x86 ---------------- CTA-861 Extension Block Revision 3 Underscans PC formats by default Basic audio support Supports YCbCr 4:4:4 Supports YCbCr 4:2:2 1 native detailed modes 30 bytes of CTA data blocks Video Data Block 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (VIC 16, native) 1920x1080i 60.000 Hz 16:9 33.750 kHz 74.250 MHz (VIC 5) 1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz (VIC 4) 720x480 59.940 Hz 16:9 31.469 kHz 27.000 MHz (VIC 3) 720x480 59.940 Hz 4:3 31.469 kHz 27.000 MHz (VIC 2) 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz (VIC 1) 720x576 50.000 Hz 4:3 31.250 kHz 27.000 MHz (VIC 17) 720x576 50.000 Hz 16:9 31.250 kHz 27.000 MHz (VIC 18) 1280x720 50.000 Hz 16:9 37.500 kHz 74.250 MHz (VIC 19) 1920x1080i 50.000 Hz 16:9 28.125 kHz 74.250 MHz (VIC 20) 1440x480i 59.940 Hz 4:3 15.734 kHz 27.000 MHz (VIC 6) 1440x480i 59.940 Hz 16:9 15.734 kHz 27.000 MHz (VIC 7) 1440x576i 50.000 Hz 4:3 15.625 kHz 27.000 MHz (VIC 21) 1440x576i 50.000 Hz 16:9 15.625 kHz 27.000 MHz (VIC 22) 1920x1080 50.000 Hz 16:9 56.250 kHz 148.500 MHz (VIC 31) Audio Data Block Linear PCM, max channels 2 Supported sample rates (kHz): 48 44.1 32 Supported sample sizes (bits): 24 20 16 Vendor-Specific Data Block, OUI 0x000c03 (HDMI) Source physical address 1.0.0.0 Speaker Allocation Data Block Speaker map: FL/FR - Front Left/Right Detailed mode: Clock 148.500 MHz, 531 mm x 299 mm 1920 2008 2052 2200 ( 88 44 148) 1080 1084 1089 1125 ( 4 5 36) +hsync +vsync VertFreq: 60.000 Hz, HorFreq: 67.500 kHz Detailed mode: Clock 74.250 MHz, 531 mm x 299 mm 1920 2008 2052 2200 ( 88 44 148) 540 542 547 562 ( 2 5 15) +hsync +vsync VertFreq: 60.000i Hz, HorFreq: 33.750 kHz Detailed mode: Clock 74.250 MHz, 531 mm x 299 mm 1280 1390 1430 1650 (110 40 220) 720 725 730 750 ( 5 5 20) +hsync +vsync VertFreq: 60.000 Hz, HorFreq: 45.000 kHz Detailed mode: Clock 27.000 MHz, 531 mm x 299 mm 720 736 798 858 ( 16 62 60) 480 489 495 525 ( 9 6 30) -hsync -vsync VertFreq: 59.940 Hz, HorFreq: 31.469 kHz Checksum: 0xe7