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computers / comp.sys.raspberry-pi / Re: Monitor blank after Fedora boot

Monitor blank after Fedora boot

<unlvlp$2f601$3@dont-email.me>

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Monitor blank after Fedora boot
Date: Wed, 10 Jan 2024 12:39:36 +0100
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by: Marco Moock - Wed, 10 Jan 2024 11:39 UTC

Hello!

I am currently trying to install Fedora on Pi4.

I copied the aarch raw image to the card and booted from it.
The boot starts and the monitor shows the kernel messages.

After that, the screen stays empty. Keyboard works, network too (I
can't login because no user is yet available).

How can I make the screen output work here?

--
kind regards
Marco

Spam und Werbung bitte an ichwillgesperrtwerden@nirvana.admins.ws

Re: Monitor blank after Fedora boot

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: 10 Jan 2024 11:59:36 +0000 (GMT)
Organization: University of Cambridge, England
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by: Theo - Wed, 10 Jan 2024 11:59 UTC

Marco Moock <mm+usenet-es@dorfdsl.de> wrote:
> Hello!
>
> I am currently trying to install Fedora on Pi4.
>
> I copied the aarch raw image to the card and booted from it.
> The boot starts and the monitor shows the kernel messages.
>
> After that, the screen stays empty. Keyboard works, network too (I
> can't login because no user is yet available).
>
> How can I make the screen output work here?

Is it perhaps displaying on the second HDMI port?

Theo

Re: Monitor blank after Fedora boot

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Wed, 10 Jan 2024 14:18:15 +0100
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by: Marco Moock - Wed, 10 Jan 2024 13:18 UTC

Am 10.01.2024 um 11:59:36 Uhr schrieb Theo:

> Is it perhaps displaying on the second HDMI port?

Not connected at boot and doesn't show something when I connect it.

I also can't connect both because I only have one HDMI to DVI cable and
only one Mini HDMI to HDMI adapter.

Re: Monitor blank after Fedora boot

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Wed, 10 Jan 2024 14:20:34 +0100
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by: Marco Moock - Wed, 10 Jan 2024 13:20 UTC

Am 10.01.2024 um 14:18:15 Uhr schrieb Marco Moock:

> Not connected at boot and doesn't show something when I connect it.

I now tried booting with monitor on HDMI0 (not connected before), but
the same situation occurs.

Re: Monitor blank after Fedora boot

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From: usenet@andyburns.uk (Andy Burns)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Wed, 10 Jan 2024 14:06:22 +0000
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by: Andy Burns - Wed, 10 Jan 2024 14:06 UTC

Marco Moock wrote:

> schrieb Theo:
>
>> Is it perhaps displaying on the second HDMI port?
>
> Not connected at boot and doesn't show something when I connect it.

Not on an rPi just a PC, but I was recently having similar issues with
Fedora37, which if not connected to the displayport monitor at boot
time, wouldn't output to the monitor after switching KVM from laptop to
the PC ...

Upgrading to Fedora40 /seems/ to have fixed the issue (only been done a
couple of days, so not absolutely certain).

Re: Monitor blank after Fedora boot

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Wed, 10 Jan 2024 15:29:55 +0100
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by: Marco Moock - Wed, 10 Jan 2024 14:29 UTC

Am 10.01.2024 um 14:06:22 Uhr schrieb Andy Burns:

> Marco Moock wrote:
>
> > schrieb Theo:
> >
> >> Is it perhaps displaying on the second HDMI port?
> >
> > Not connected at boot and doesn't show something when I connect it.
> >
>
> Not on an rPi just a PC, but I was recently having similar issues
> with Fedora37, which if not connected to the displayport monitor at
> boot time, wouldn't output to the monitor after switching KVM from
> laptop to the PC ...

Does the Pi support Displayport?
Is there a workaround?

Re: Monitor blank after Fedora boot

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: 10 Jan 2024 14:46:46 +0000 (GMT)
Organization: University of Cambridge, England
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by: Theo - Wed, 10 Jan 2024 14:46 UTC

Marco Moock <mm+usenet-es@dorfdsl.de> wrote:
> Am 10.01.2024 um 14:06:22 Uhr schrieb Andy Burns:
>
> > Marco Moock wrote:
> >
> > > schrieb Theo:
> > >
> > >> Is it perhaps displaying on the second HDMI port?
> > >
> > > Not connected at boot and doesn't show something when I connect it.
> > >
> >
> > Not on an rPi just a PC, but I was recently having similar issues
> > with Fedora37, which if not connected to the displayport monitor at
> > boot time, wouldn't output to the monitor after switching KVM from
> > laptop to the PC ...
>
> Does the Pi support Displayport?

No it doesn't, it's HDMI only.

Some DP outputs can switch into HDMI mode and drive HDMI monitors via a
passive converter, but I'm not sure DP inputs can accept HDMI.

> Is there a workaround?

You'd need an active HDMI to DP converter.

But the fact it's working during boot suggests it's not a monitor
incompatibility, since it can clearly drive the monitor to begin with.

One thought might be that the desktop is driving the monitor to some
resolution it's not happy with - perhaps worth trying is to configure the
output with some safe resolution like 640x480 and see if it accepts it.

Theo

Re: Monitor blank after Fedora boot

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Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
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by: Andy Burns - Wed, 10 Jan 2024 15:47 UTC

Marco Moock wrote:

> schrieb Andy Burns:
>
>> I was recently having similar issues with Fedora37, which if not
>> connected to the displayport monitor at boot time, wouldn't output
>> to the monitor after switching KVM from laptop to the PC ...
>
> Does the Pi support Displayport?

Not directly, but adapters are cheap, e.g.
<https://amazon.co.uk/DPsource-to-HDMIsink/dp/B09CYYF5NN?th=1>

> Is there a workaround?

What version of Fedora is on the rPi?

Re: Monitor blank after Fedora boot

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: 10 Jan 2024 17:23:55 +0000 (GMT)
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by: Theo - Wed, 10 Jan 2024 17:23 UTC

Andy Burns <usenet@andyburns.uk> wrote:
>
> Marco Moock wrote:
>
> > schrieb Andy Burns:
> >
> >> I was recently having similar issues with Fedora37, which if not
> >> connected to the displayport monitor at boot time, wouldn't output
> >> to the monitor after switching KVM from laptop to the PC ...
> >
> > Does the Pi support Displayport?
>
> Not directly, but adapters are cheap, e.g.
> <https://amazon.co.uk/DPsource-to-HDMIsink/dp/B09CYYF5NN?th=1>

That's the wrong way round, you need something like:
https://www.amazon.co.uk/Cable-Matters-DisplayPort-Adapter-Resolution/dp/B07SRW29PG/

Your link is also only a passive adapter, so only works if the source DP
already supports HDMI protocol (aka DP++).

Theo

Re: Monitor blank after Fedora boot

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Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
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by: Andy Burns - Wed, 10 Jan 2024 18:00 UTC

Theo wrote:

> Andy Burns wrote:
>
>> <https://amazon.co.uk/DPsource-to-HDMIsink/dp/B09CYYF5NN?th=1>
>
> That's the wrong way round,

Turns out I actually searched for "DP source to HDMI sink" instead of
"HDMI source to DP sink" ... I was a little surprised they were as cheap
and easy as to find as that.

Re: Monitor blank after Fedora boot

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Wed, 10 Jan 2024 20:03:30 +0100
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by: Marco Moock - Wed, 10 Jan 2024 19:03 UTC

Am 10.01.2024 um 15:47:54 Uhr schrieb Andy Burns:

> Marco Moock wrote:
>
> > schrieb Andy Burns:
> >
> >> I was recently having similar issues with Fedora37, which if not
> >> connected to the displayport monitor at boot time, wouldn't output
> >> to the monitor after switching KVM from laptop to the PC ...
> >
> > Does the Pi support Displayport?
>
> Not directly, but adapters are cheap, e.g.
> <https://amazon.co.uk/DPsource-to-HDMIsink/dp/B09CYYF5NN?th=1>
>
> > Is there a workaround?
>
> What version of Fedora is on the rPi?

Fedora-Server-39-1.5.aarch64.raw.xz is the image I used.

Re: Monitor blank after Fedora boot

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by: Marco Moock - Thu, 11 Jan 2024 08:17 UTC

Am 10.01.2024 um 20:03:30 Uhr schrieb Marco Moock:

> Am 10.01.2024 um 15:47:54 Uhr schrieb Andy Burns:
>
> > Marco Moock wrote:
> >
> > > schrieb Andy Burns:
> > >
> > >> I was recently having similar issues with Fedora37, which if not
> > >> connected to the displayport monitor at boot time, wouldn't
> > >> output to the monitor after switching KVM from laptop to the PC
> > >> ...
> > >
> > > Does the Pi support Displayport?
> >
> > Not directly, but adapters are cheap, e.g.
> > <https://amazon.co.uk/DPsource-to-HDMIsink/dp/B09CYYF5NN?th=1>
> >
> > > Is there a workaround?
> >
> > What version of Fedora is on the rPi?
>
> Fedora-Server-39-1.5.aarch64.raw.xz is the image I used.

I now tried Debian, same problem. Boot log is shown, after that screen
blank.

Re: Monitor blank after Fedora boot

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: 11 Jan 2024 09:31:26 +0000 (GMT)
Organization: University of Cambridge, England
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by: Theo - Thu, 11 Jan 2024 09:31 UTC

Marco Moock <mm+usenet-es@dorfdsl.de> wrote:
> I now tried Debian, same problem. Boot log is shown, after that screen
> blank.

That suggests the problem is that the monitor claims it can do such-and-such
resolution, and then isn't happy when the Pi does it. Do you have a menu
button on the monitor you can press and does it tell you the resolution, or
does it say 'no signal' or 'out of range' or something?

I'd guess the solution is to configure the desktop environment to use a
different resolution, but it will depend on the DE as to how you configure
that from the command line without using the DE's settings UI (which you
can't see).

You could also try xrandr after setting a $DISPLAY variable, something like:

$ export DISPLAY=:0
$ xrandr --mode 640x480

which should temporarily set the resolution to 640x480. Then you can get
into the settings UI.

Note this is for X11 - I'm not sure what the equivalent is for Wayland.

Theo

Re: Monitor blank after Fedora boot

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From: usenet@andyburns.uk (Andy Burns)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Thu, 11 Jan 2024 10:15:23 +0000
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by: Andy Burns - Thu, 11 Jan 2024 10:15 UTC

Theo wrote:

> You could also try xrandr after setting a $DISPLAY variable
> Note this is for X11 - I'm not sure what the equivalent is for Wayland.

You need a "helper" such as gnome-randr.py or gnome-randr-rust these are
not part of Fedora

Re: Monitor blank after Fedora boot

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Thu, 11 Jan 2024 14:07:29 +0100
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by: Marco Moock - Thu, 11 Jan 2024 13:07 UTC

Am 11.01.2024 um 09:31:26 Uhr schrieb Theo:

> That suggests the problem is that the monitor claims it can do
> such-and-such resolution, and then isn't happy when the Pi does it.
> Do you have a menu button on the monitor you can press and does it
> tell you the resolution, or does it say 'no signal' or 'out of range'
> or something?

I have now testet another monitor, in Debian all is fine.
With Fedora, the problem still exists.

The monitor shows "no signal".

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Thu, 11 Jan 2024 19:52:47 +0100
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by: Marco Moock - Thu, 11 Jan 2024 18:52 UTC

Am 11.01.2024 um 14:07:29 Uhr schrieb Marco Moock:

> Am 11.01.2024 um 09:31:26 Uhr schrieb Theo:
>
> > That suggests the problem is that the monitor claims it can do
> > such-and-such resolution, and then isn't happy when the Pi does it.
> > Do you have a menu button on the monitor you can press and does it
> > tell you the resolution, or does it say 'no signal' or 'out of
> > range' or something?
>
> I have now testet another monitor, in Debian all is fine.
> With Fedora, the problem still exists.
>
> The monitor shows "no signal".

Can that issue come from the DVI to HDMI cable?

I don't have any HDMI compatible monitor at all, I only have some that
have VGA/DVI and I have a simple adapter cable.
Maybe the output after the boot isn't acceptable for the DVI monitor?

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: 11 Jan 2024 20:50:14 +0000 (GMT)
Organization: University of Cambridge, England
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by: Theo - Thu, 11 Jan 2024 20:50 UTC

Marco Moock <mm+usenet-es@dorfdsl.de> wrote:
> Am 11.01.2024 um 14:07:29 Uhr schrieb Marco Moock:
>
> > Am 11.01.2024 um 09:31:26 Uhr schrieb Theo:
> >
> > > That suggests the problem is that the monitor claims it can do
> > > such-and-such resolution, and then isn't happy when the Pi does it.
> > > Do you have a menu button on the monitor you can press and does it
> > > tell you the resolution, or does it say 'no signal' or 'out of
> > > range' or something?
> >
> > I have now testet another monitor, in Debian all is fine.
> > With Fedora, the problem still exists.
> >
> > The monitor shows "no signal".
>
> Can that issue come from the DVI to HDMI cable?
>
> I don't have any HDMI compatible monitor at all, I only have some that
> have VGA/DVI and I have a simple adapter cable.
> Maybe the output after the boot isn't acceptable for the DVI monitor?

Single link DVI only goes up to 1080p. Maybe the monitor is declaring
itself to support some higher resolution, and then balking when the Pi sends
it? Or maybe the Pi is sending HDMI instead of DVI and the monitor can't
handle that? The Pi can't do dual-link DVI but maybe the monitor is telling
it to do a dual-link-only resolution?

There are some settings in config.txt and cmdline.txt that would be worth
playing with:
https://www.raspberrypi.com/documentation/computers/config_txt.html#video-options
https://www.raspberrypi.com/documentation/computers/configuration.html#hdmi-configuration

Theo

Re: Monitor blank after Fedora boot

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Monitor blank after Fedora boot
Date: Fri, 12 Jan 2024 08:29:31 +0100
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by: Marco Moock - Fri, 12 Jan 2024 07:29 UTC

Am 11.01.2024 um 20:50:14 Uhr schrieb Theo:

> Single link DVI only goes up to 1080p. Maybe the monitor is declaring
> itself to support some higher resolution, and then balking when the
> Pi sends it? Or maybe the Pi is sending HDMI instead of DVI and the
> monitor can't handle that? The Pi can't do dual-link DVI but maybe
> the monitor is telling it to do a dual-link-only resolution?

Monitor is ASUS VW22AT, 1680*1050.

> There are some settings in config.txt and cmdline.txt that would be
> worth playing with:
> https://www.raspberrypi.com/documentation/computers/config_txt.html#video-options
> https://www.raspberrypi.com/documentation/computers/configuration.html#hdmi-configuration

Does that affected the booted OS?

Subject	Author
Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Theo
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Andy Burns
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Theo
Re: Monitor blank after Fedora boot	Andy Burns
Re: Monitor blank after Fedora boot	Theo
Re: Monitor blank after Fedora boot	Andy Burns
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Theo
Re: Monitor blank after Fedora boot	Andy Burns
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Marco Moock
Re: Monitor blank after Fedora boot	Theo
Re: Monitor blank after Fedora boot	Marco Moock