I'm trying to switch Raspberry Pi to a new monitor, but monitor complains about not getting HDMI signal. The old monitor was attached via HDMI-DVI cable, while new monitor has HDMI-HDMI cable and then HDMI to Display Port adapter as monitor only has old VGA and DP input. Monitor is 24" Dell E2416H.

Pi boots OK and I can SSH to it.

I've tried playing with most of the parameters with the same effect, but most notably:

  • hdmi_safe=1

  • tried boosting HDMI signal with config_hdmi_boost to 4 and to 7

  • tried booting without SD card to display test rainbow screen; no rainbow seen

  • tried hdmi_force_hotplug=1

  • tried hdmi_drive=2

  • tried disable_overscan=1

  • hdmi_group=1 and hdmi_mode=1 (VGA 60Hz) and monitor native hdmi_group=2 hdmi_mode=82 or hdmi_group=1 hdmi_mode=16.

Both result in this mode:

pi@screenly ~ $ tvservice -s
state 0x40002 [NTSC 4:3], 720x480 @ 60.00Hz, interlaced
pi@screenly ~ $ tvservice -m CEA
Group CEA has 0 modes:
pi@screenly ~ $ tvservice -m DMT
Group DMT has 0 modes:
  • hdmi_force_hotplug=1 (in combination with hdmi_group=1 hdmi_mode=16) does indeed force HDMI...

...but still nothing on the screen:

pi@screenly ~ $ tvservice -s
state 0x12001a [HDMI CEA (16) RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive
pi@screenly ~ $ tvservice -m DMT
Group DMT has 1 modes:
           mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
pi@screenly ~ $ tvservice -m CEA
Group CEA has 2 modes:
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
  (prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive

Can anyone offer some advice or ideas?

EDIT: Solved by using HDMI to VGA adapter. However, I'd still like to know why DisplayPort doesn't work... is there anyone who successfully runs Pi on DisplayPort?

  • You're probably using a "passive" DisplayPort adapter. I don't think the Pi's HDMI port can power said adapter. PCs can provide more juice to it so your PC could use it. Keep it just in case. – PNDA Mar 21 '16 at 12:00
  • @PandaLion98 - So "active" DisplayPort adapter could work with Pi? – Domchi Mar 22 '16 at 23:28
  • It should work. – PNDA Mar 23 '16 at 0:28

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