I have the same issue as OP, so I was excited to try this out. I pasted the above code into the cstomize field, but with no luck. I still get No HDMI on the display pane.
Log snippet:
Jun 23 07:09:37 glkvm daemon.debug kvmd: aiohttp.access INFO --- [admin (token) / 192.168.0.114] 'POST /upgrade/edid HTTP/1.0' => 200; size=290 --- referer='https://glkvm.local/'; user_agent='Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit
Jun 23 07:09:37 glkvm daemon.debug kvmd: kvmd.apps.kvmd.streamer INFO --- => -- ERROR [400.007 tid=3563] -- get 6911c resolution failed,use 1080P as default
Jun 23 07:09:37 glkvm daemon.debug kvmd: kvmd.apps.kvmd.streamer INFO --- => -- ERROR [400.007 tid=3563] -- init rv1126 encoder failed
Jun 23 07:09:37 glkvm user.err kernel: [ 400.057627] lt6911c 1-002b: 0xD211 is 0
Jun 23 07:09:38 glkvm daemon.debug kvmd: kvmd.apps.kvmd.streamer INFO --- => -- ERROR [401.007 tid=3563] -- get 6911c resolution failed,use 1080P as default
Jun 23 07:09:38 glkvm daemon.debug kvmd: kvmd.apps.kvmd.streamer INFO --- => -- ERROR [401.007 tid=3563] -- init rv1126 encoder failed
Jun 23 07:09:38 glkvm user.info kernel: [ 401.664593] lt6911c 1-002b: Resolution: 1024x768@61 fps (htotal=1344, vtotal=806) audio: 0 realaudio: 0
Jun 23 07:09:38 glkvm user.err kernel: [ 401.664648] lt6911c 1-002b: lt6911c_rcv_supported_res: unsupported resolution 1024x768@61
Jun 23 07:09:38 glkvm user.err kernel: [ 401.664666] m00_f_lt6911c 1-002b: lt6911c_get_timing: rcv err res, return no signal!
The chip cannot handle input exceeding 60 frames. Even if I remove the restrictions in the kernel driver, errors will still occur in other places, such as during encoding. If I force it to 60 frames per second, either it will report errors crazily or the resulting picture will be very strange. If the problem of 61 frames output by the computer cannot be solved... This might not be solvable
Even if the picture is distorted, it's not like we need to do anything graphic. We really need the KVM to get to the BIOS of the machine remotely, and that is all textual anyway.
Please allow me to test it out? If it fails, then we know it's not solvable.
Do you have any idea why physical monitors are able to handle this fine?
Hi - I was also seeing the same problem, and I downloaded the new image you specified, and I can say that it also works now! I have a very constrained micro-itx NAS chassis, and limited PCIe slots, so I was forced to use this m2 HDMI adapter: https://www.asrockrack.com/general/productdetail.asp?Model=M2_VGA#Specifications -- this adapter also has the same 61fps issue. Possibly all Siliconmotion SM750 based adapters?