Re: Raspberry pi 4 second monitor problem on xeno3

[77dab@tiscali.it]

  Ok, thank you for your time.

Il 28.06.2021 15:49 Greg Gallagher ha
scritto: 

> On Mon, Jun 28, 2021 at 9:02 AM davide via Xenomai wrote:

> 
>> (sorry if I'm down-quoting, but I cannot write below here..) 
>>
I
>> agree with you, it's just I don't know how to debug this..
>> 
>>
I'm looking
>> at /var/log/Xorg.0.log differences between the
non-working situation Vs
>> a standard debian64bit working one:
>> first
difference is -> working:
>> 
>> [
>> 5.854] (II) xfree86: Adding drm
device (/dev/dri/card1)
>> [ 5.862] (II)
>> xfree86: Adding drm device
(/dev/dri/card0)
>> 
>> while those lines aren't
>> present in the
NOT-working, and there is:
>> 
>> [ 5.307] (EE) open
>> /dev/dri/card0:
No such file or directory
>> 
>> does that tells anything?
>> 
>> Il
>>
28.06.2021 14:17 Greg Gallagher ha scritto: 
>> 
>> > On Mon, Jun 28,
2021 at
>> 8:12 AM davide via Xenomai wrote: 
>> > 
>> >> kernel comes
from here: 
>> >>
>> https://github.com/thanhtam-h/rpi4-xeno3 [1] [1]
>>
>> 
>> >> One thing: even if
>> desktop isn't extended to the second
screen, and
>> >> xrandr sees only a
>> 'default' screen 
>> >> if I
give: 
>> >> 
>> >> cat /dev/random >
>> >> /dev/fb1
>> 
>> >> the
second screen gets filled.. 
>> >> it sounds odd to me, because
>> >>
>>
that means framebuffer is open and working. 
>> >> So, what's going
on
>> here?
>> >> 
>> >> Il 28.06.2021 13:33 Greg Gallagher ha scritto:

>> >> 
>> >> >
>> It's possible the
>> >> drivers aren't working in the
kernel without ipipe,
>> you'll want to
>> >> confirm that first. If you
didn't compile the kernel
>> yourself you'll
>> >> want to find the
sources so you can debug.. 
>> >> >
>> Greg
>> >> 
>> >> Con Tiscali
Mobile Smart 70 hai 70 GB in 4G, minuti
>> illimitati e 100 SMS a soli
7,99EUR al mese http://tisca.li/Smart70 [2]
>> [2]
>> > 
>> > This
doesn't sound like a xenomai or ipipe issue, you'll have
>> to do some
further debug and see if this issue is being caused by the
>> ipipe or
xenomai. Right now what you have described doesn't sound like
>> an
issue with the real-time core. 
>> > Greg
>> 
>> Con Tiscali Mobile
Smart 70 hai 70 GB in 4G, minuti illimitati e 100 SMS a soli 7,99EUR al
mese http://tisca.li/Smart70 [3]
> 
> Ok, you may be missing a driver or
certain modules aren't loaded yet. You could see if you can log an issue
on the GitHub project you referenced. But this doesn't look to be a
xenomai or ipipe issue so this list probably won't be able to help too
much. 
> Greg
  


Con Tiscali Mobile Smart 70 hai 70 GB in 4G, minuti illimitati e 100 SMS a soli 7,99€ al mese http://tisca.li/Smart70