No video output after boot up until replugging the HDMI (1080p)

tonsquemike commented 3 years ago

机型配置信息

I don't have video signal over HDMI after login screen. I turn on automatic login.

I have a Samsung LC24F390FHLXZX FHD 1080p monitor.

After boot up. The desktop is showed for almost two seconds but then the screen monitor loss the signal.

The only way to get video output again is disconecting the HDMI port and replug it.

I tried to use Display Port but it doesn`t have signal. DP only shows BIOS info->Apple logo. I can´t get video over DP on 1080p screen monitor.

How can I resolve this issue? Do I need to change something in EFI? I added the flag igfxonln=1 but it does not make difference

qianqiangliu commented 3 years ago

Just use DP port.

tonsquemike commented 3 years ago

Just use DP port.

DP isn't working

SuperNG6 commented 3 years ago

It may be a monitor compatibility issue, you can try testing on another monitor

tonsquemike commented 3 years ago

I can confirm that hdmi works well with another monitor. thanks