On Sat, Jan 23, 2021 at 9:45 PM o1bigtenor <o1bigtenor@xxxxxxxxx> wrote: > > On Sat, Jan 23, 2021 at 6:43 PM Roy Spliet <nouveau@xxxxxxxxxx> wrote: > > snip > Hmmmmmmmm - - - - have found a pile of documents where EDID is shown > to be a very error prone 'standard'. The model year listed is only one of those > the companies documents indicate that the model was sold starting in 2019 and > that there are 3 HDMI 2.0b inputs. > > It gets far more interesting! > I have 2 graphics cards: > card0 is an Nvidia 1050 Ti, card 1 is an Nvidia 570 > there is only one HDMI port between the two cards (on card0) yet it is the HDMI > interface on card 1 that has the EDID information and reads as the port is > enabled. (Absolutely cannot enable the HDMI port on card0!!) > In my Xorg.0.log files I find a modeline that reads like: > [ 40.740] (II) modeset(G0): Supported detailed timing: > [ 40.740] (II) modeset(G0): clock: 297.0 MHz Image Size: 1872 x 1053 mm > [ 40.740] (II) modeset(G0): h_active: 3840 h_sync: 4016 > h_sync_end 4104 h_blank_end 4400 h_border: 0 > [ 40.740] (II) modeset(G0): v_active: 2160 v_sync: 2168 > v_sync_end 2178 v_blanking: 2250 v_border: 0 > > which is somewhat similar to: > > Preferred Video Timing if only Block 0 is parsed: > DTD 1: 3840x2160 30.000 Hz 16:9 67.500 kHz 297.000 MHz > (1872 mm x 1053 mm) > Hfront 176 Hsync 88 Hback 296 Hpol P > Vfront 8 Vsync 10 Vback 72 Vpol P > > ---------------- > > Native Video Timing if only Block 0 is parsed: > DTD 1: 3840x2160 30.000 Hz 16:9 67.500 kHz 297.000 MHz > (1872 mm x 1053 mm) > Hfront 176 Hsync 88 Hback 296 Hpol P > Vfront 8 Vsync 10 Vback 72 Vpol P > > ---------------- > > Preferred Video Timings if Block 0 and CTA-861 Blocks are parsed: > DTD 1: 3840x2160 30.000 Hz 16:9 67.500 kHz 297.000 MHz > (1872 mm x 1053 mm) > Hfront 176 Hsync 88 Hback 296 Hpol P > Vfront 8 Vsync 10 Vback 72 Vpol P > VIC 95: 3840x2160 30.000 Hz 16:9 67.500 kHz 297.000 MHz > Hfront 176 Hsync 88 Hback 296 Hpol P > Vfront 8 Vsync 10 Vback 72 Vpol P > > ---------------- > > Native Video Timing if Block 0 and CTA-861 Blocks are parsed: > DTD 1: 3840x2160 30.000 Hz 16:9 67.500 kHz 297.000 MHz > (1872 mm x 1053 mm) > Hfront 176 Hsync 88 Hback 296 Hpol P > Vfront 8 Vsync 10 Vback 72 Vpol P > > which is was the hex dump written for HDMI-1-2 (listed as on the card that > has no HDMI ports) as the EDID. > Doing some more research and found this: https://www.kernel.org/doc/html/v5.6/driver-api/edid.html that with the two attachments is there any way of getting an 'accurate' EDID so that I could 'install' it and with that effect the use of my 3840x2160 'monitor'? TIA
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20210123_var_log_Xorg_0_log_files_for_HiSense_monitor
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EDID_for_HDMI-1
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