10-17-2021 07:45 PM
07-01-2022 06:35 PM
I have the same problem on a 5D Mark III running firmware 1.3.5. The HDMI output is always 480i59.94 with absolutely no mirroring despite the preference being set. I purchased a brand new Canon HTC-100 mini-HDMI cable just in case. It's the same 480i59.94 on both a BlackMagic UltraStudio Recorder 3G and a LG WebOS OLED TV.
This may have broken somewhere in the 1.3.x firmware range.
07-03-2022 12:15 AM
After downgrading to every possible firmware from 1.3.5 to 1.2.1, I found I still couldn't get more than 480i59.94 output with any display or capture card (shown on less advanced displays as 480p). Finally I took a close look at the mini-HDMI port and found that half of one of the DDC data pads is missing, and it's one that's critical for EDID negotiation. This explains why it never escalates to Full HD. I suspect it could also be why mirroring mode never activates for clean HDMI output. For anyone else having this exact problem of no FHD and no mirroring, chances are you need to replace the HDMI C port (mini-HDMI), which is unfortunately surface-mount electronics.
08-03-2022 09:50 PM
do you have the 1.2.1 firmware?
09/26/2024: New firmware updates are available.
EOS R5 Mark II - Version 1.0.1
EOS R6 Mark II - Version 1.5.0
07/01/2024: New firmware updates are available.
04/16/2024: New firmware updates are available.
RF100-300mm F2.8 L IS USM - Version 1.0.6
RF400mm F2.8 L IS USM - Version 1.0.6
RF600mm F4 L IS USM - Version 1.0.6
RF800mm F5.6 L IS USM - Version 1.0.4
RF1200mm F8 L IS USM - Version 1.0.4
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