[mythtv-users] Can't start mythfrontend with TV off since moving to Intel graphics
jfabernathy at gmail.com
Sat Oct 31 09:57:46 UTC 2020
On 10/31/20 5:39 AM, Paul Gardiner wrote:
> On 28/10/2020 09:06, James Linder wrote:
>> Paul, late wade in, so excuse any rubbish, and top post because THIS
>> is thee meat, below may be of interest.
>> All my custom and EDID overide was of no avail to my headless backend.
>> xrandr dis sort out the display issues. IIRC I setup a systemd task
>> to do it after boot
> Do you remember anything more of this? I tried various uses of xrandr
> in my .xinitrc file, just before it starts mythfrontend. I'm not sure
> how to involve systemd: I didn't think xrandr could do anything until
> the X server is up.
> I have a workaround for now: on Gary's advice, I bought an EDID
> emulator. The EDID it fakes is pretty useless, not even having a 24fps
> mode, but it does fool the system into thinking a monitor is
> connected, and I can use the CustomEDID option to get the correct modes.
> I'm still interested in other solutions, particularly Mark's thoughts
> on having mythfrontend handle monitor changes.
While I'm not using Intel GFX, I had this issue yesterday. I had not
tested powering up the system with the TV off and when I did, no
display. Had to ssh in and reboot with TV on. So my solution which now
1. With TV and computer on and working. I captured the current X11
information and put it into /etc/X11/xorg.conf. In my case Nvidia has a
tool for this but so does Xorg.
2. Capture EDID to /etc/X11/hdmi0.edid. I used Nvidia tool, there are
3. Modify [Device] section of xorg.conf to include:
Option "ConnectedMonitor" "HDMI-0"
Option "CustomEDID" "HDMI-0:/etc/X11/hdmi0.edid"
Option "IgnoreEDID" "false"
Option "UseEDID" "true"
4. My test that it worked was to issue reboot command and immediately
turn off TV with TV remote. I check computer with ssh and when it was
complete up, I turned on TV. I still have to play with input from mouse
of keyboard to get the display to come alive, but I think that'd because
I have an 5x1 HDMI switch that will switch away from a port if it's
powered off and another port is displaying output.
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