Re: X11 on Pi 4

On Sat, Oct 16, 2021 at 02:24:56PM -0700, Carl Johnson wrote:
> Bernd Walter <ticso@cicely7.cicely.de> writes:
> 
> > On Sat, Oct 16, 2021 at 09:51:54PM +0200, Bernd Walter wrote:
> >> I'm trying to get X11 runing on the Pi4.
> >> So far I don't get a signal on the screen.
> >> I'd tried both HDMI ports.
> >> FreeBSD mentions:
> >> VT(efifb): resolution 592x448
> >> ...
> >> fb0: <BCM2835 VT framebuffer driver> on simplebus0
> >> fb0: keeping existing fb bpp of 32
> >> fbd0 on fb0
> >> WARNING: Device "fb" is Giant locked and may be deleted before FreeBSD 14.0.
> >> VT: Replacing driver "efifb" with new "fb".
> >> fb0: 592x448(592x448@0,0) 32bpp
> >> fb0: fbswap: 1, pitch 2368, base 0x3eaf5000, screen_size 1060864
> >
> > Ok, there was hdmi_safe=1, now I see the resultion.
> > However, the screen still has no signal.
> >
> >> Is there some kind of initialisation missing from u-boot?
> >> I noticed that raspbian on the Pi4 also leave the screen disabled
> >> until X starts.
> >> Unfortunately starting X on FreeBSD doesn't change anything.
> 
> I don't know if this is your problem, but FreeBSD doesn't seem to
> initialize HDMI unless it connects to a monitor at boot.  That means
> that you have to have a monitor plugged in when it boots up, and the
> monitor has to be turned on.  If you boot up without a monitor plugged
> in, then I don't know any way to turn the HDMI output on, other than
> rebooting.

I had it connected (tried both ports) and powered.
On the Pi3B it works fine with the same display.
Will try some other displays soon and do some more tests with raspbian.
As I wrote, with raspbian the display also didn't show anything until
X got up.

-- 
B.Walter <bernd@bwct.de> https://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.