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Bug#986863: linux: Serial terminal for RPi 4 and p400 corrupted during bootup

Started byGunnar Wolf <gwolf@gwolf.org>
First post2021-04-13 20:10 +0200
Last post2021-04-13 23:30 +0200
Articles 4 — 3 participants

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  Bug#986863: linux: Serial terminal for RPi 4 and p400 corrupted during bootup Gunnar Wolf <gwolf@gwolf.org> - 2021-04-13 20:10 +0200
    Processed: Re: linux: Serial terminal for RPi 4 and p400  corrupted during bootup "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-04-13 20:10 +0200
    Bug#986863: correcting metadata Diederik de Haas <didi.debian@cknow.org> - 2021-04-13 23:30 +0200
      Processed: Re: Bug#986863: correcting metadata "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-04-13 23:30 +0200

#70123 — Bug#986863: linux: Serial terminal for RPi 4 and p400 corrupted during bootup

FromGunnar Wolf <gwolf@gwolf.org>
Date2021-04-13 20:10 +0200
SubjectBug#986863: linux: Serial terminal for RPi 4 and p400 corrupted during bootup
Message-ID<C3vE5-1bV-1@gated-at.bofh.it>

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found 986863 5.10.0-6-arm64
notfound 986863 5.8.0-3-arm64
thanks

I blacklisted the vc4 module, and the console works reliably again, so
that's a way to get a working system. I will blacklist in the images I
produce, but this should not be needed for users to know!

I am also trying with a kernel from the 5.8 series, as noted in the
pseudo-headers to the BTS. The bug does not happen under kernel
5.8.0-3. I will try to more precisely pinpoint the place where it
stopped working.

Just to have as much information together -- If I boot without loading
the vc4 module, then load it via modprobe, I get the following
messages:

root@rpi4-20210226:~# modprobe vc4
[   71.824867] debugfs: Directory 'fef00700.hdmi' with parent 'vc4-hdmi-0' already present!
[   71.835045] vc4-drm gpu: bound fef00700.hdmi (ops vc4_hdmi_ops [vc4])
[   71.869840] debugfs: Directory 'fef05700.hdmi' with parent 'vc4-hdmi-1' already present!
[   71.879230] vc4-drm gpu: bound fef05700.hdmi (ops vc4_hdmi_ops [vc4])
[   71.899628] vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4])
[   71.906197] vc4-drm gpu: bound fe004000.txp (ops vc4_txp_ops [vc4])
[   71.912815] vc4-drm gpu: bound fe206000.pixelvalve (ops vc4_crtc_ops [vc4])
[   71.920100] vc4-drm gpu: bound fe207000.pixelvalve (ops vc4_crtc_ops [vc4])
[   71.927301] vc4-drm gpu: bound fe20a000.pixelvalve (ops vc4_crtc_ops [vc4])
[   71.934495] vc4-drm gpu: bound fe216000.pixelvalve (ops vc4_crtc_ops [vc4])
[   71.941850] fb0: switching to vc4drmfb from simple
[   71.947094] Console: switching to colour dummy device 80x25
[   71.974285] [drm] Initialized vc4 0.0.0 20140616 for gpu on minor 0
[   72.035497] Console: switching to colour frame buffer device 160x45
[   72.041942] vc4-drm gpu: [drm] fb0: vc4drmfb frame buffer device
root@rpi4-20210226:~# 

After which, the console becomes unoperative.

I tested this in the p400 as well, the behavior us the same.

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#70124 — Processed: Re: linux: Serial terminal for RPi 4 and p400 corrupted during bootup

From"Debian Bug Tracking System" <owner@bugs.debian.org>
Date2021-04-13 20:10 +0200
SubjectProcessed: Re: linux: Serial terminal for RPi 4 and p400 corrupted during bootup
Message-ID<C3vE5-1bV-3@gated-at.bofh.it>
In reply to#70123
Processing commands for control@bugs.debian.org:

> found 986863 5.10.0-6-arm64
Bug #986863 [src:linux] linux: Serial terminal for RPi 4 and p400 corrupted during bootup
The source 'linux' and version '5.10.0-6-arm64' do not appear to match any binary packages
Marked as found in versions linux/5.10.0-6-arm64.
> notfound 986863 5.8.0-3-arm64
Bug #986863 [src:linux] linux: Serial terminal for RPi 4 and p400 corrupted during bootup
The source 'linux' and version '5.8.0-3-arm64' do not appear to match any binary packages
Ignoring request to alter found versions of bug #986863 to the same values previously set
> thanks
Stopping processing here.

Please contact me if you need assistance.
-- 
986863: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986863
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#70128 — Bug#986863: correcting metadata

FromDiederik de Haas <didi.debian@cknow.org>
Date2021-04-13 23:30 +0200
SubjectBug#986863: correcting metadata
Message-ID<C3yLE-2Ze-5@gated-at.bofh.it>
In reply to#70123

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Control: notfound -1 5.8.14-1
Control: found -1 5.10.28-1

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#70129 — Processed: Re: Bug#986863: correcting metadata

From"Debian Bug Tracking System" <owner@bugs.debian.org>
Date2021-04-13 23:30 +0200
SubjectProcessed: Re: Bug#986863: correcting metadata
Message-ID<C3yLE-2Ze-9@gated-at.bofh.it>
In reply to#70128
Processing control commands:

> notfound -1 5.8.14-1
Bug #986863 [src:linux] linux: Serial terminal for RPi 4 and p400 corrupted during bootup
Ignoring request to alter found versions of bug #986863 to the same values previously set
> found -1 5.10.28-1
Bug #986863 [src:linux] linux: Serial terminal for RPi 4 and p400 corrupted during bootup
Marked as found in versions linux/5.10.28-1.

-- 
986863: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986863
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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