[Diodato]

I am having the same issue with my KS8000, Yamaha RX-A550 & Asus Chromebox running both Legacy/UEFI & Intel-openelc 6 / Libreelec 7.02. I tried flashing the UEFI firmware after having used the legacy firmware for years & can confirm the TV still resets the input to PC. I also picked up a JU7100 from 2015 & did not have this issue, but had to upgrade with the KS8000 sale that has been going on recently. The KS8000 is only TV of about 10 that I have tested it with that has this problem.

I swapped the Chromebox with an odroid c2 & it did not reset the input, so it is an isolated issue with the Chromebox, KS8000 & A/V receiver. I love my Chromebox & hopefully can get this resolved, but I don't think it will & my only solution is to replace it with a different box. Its worth the time saved having to select the input & reset all devices to get picture formatted properly with Movie mode selected every time I want to watch TV. At least with more 4K HEVC coming down the pipes, the Chromebox was going to be on its way out in the near future but not so soon . It served me well for few years thanks again to Mr Chromebox!

I am in the same boat. I don't have any AVR so my Chromebox (CN60) running LibreELEC is directly connected to the Samsung KS8000 (European).
Happens on all 4 HDMI inputs even though HDMI2 is suggested by Samsung for PC connection (labelled HDMI2/DVI).

If LibreElec's GUI is set to 1920x1080p @59.94 or @60 the TV recognizes the signal as coming from a PC and will disable certain viewing modes and many picture settings. And it is completely independent of the Limited or Full RGB settings of Kodi.
Any other refresh rate for progressive full HD or any refresh frequency for interlaced will not trigger the "PC mode".
Of course the same applies when Kodi automatically changes the refresh rate depending on the video material (and if Kodi is set to change the display refresh rate). So any "interlaced" video file (29.97/30/59.97/60) will cause the TV to activate the "PC signal" mode.


This happens only with the Chromebox.

• my PS3 outputs 1920x1080@60p and the TV doesn't switch to "PC mode".
  
• my Pioneer BDP-140 BD player outputs 1920x1080@60p and the TV doesn't switch to "PC mode".
  
• my Wii U player outputs 1920x1080@60p (limited RGB) and the TV doesn't switch to "PC mode".
  

I can play with the HDMI settings of these devices: resolution, interlaced/progressive, refresh rate, full/limited scale and the TV will not recognize the source as a "PC". Only Chromebox (tested both Jarvis/Krypton).

ok did some searching for you on AVS, seems that if you rename the HDMI input label from 'PC' to something else (eg, 'Kodi') and/or change the input type, and that should prevent it from auto-switching to PC mode. For more info on PC mode, see: http://www.avsforum.com/forum/166-lcd-fl...hread.html

Thanks for your effort but renaming or changing the icon for a specific input doesn't matter. You can't set the "tupe" only name and icon. As soon as the Chromebox outputs Full HD @ 59.97 or @60Hz the TV renames the HDMI input to "PC" and changes accordingly the icon.
I'm on the latest firmware 1142, maybe this was a solution with previous firmwares.
Also the North American KS8000 model is different than the European. Thanks Samsung for the confusing model names....

sounds like Samsung has some serious firmware bugs related to that feature unfortunately

Well, I wouldn't blame Samsung so fast. Like I wrote above this happens only with a Chromebox and does not happen with three other devices.

Any ideas?