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From: =?utf-8?Q?Klaus_K=C3=BCchemann?= <maciphone2@googlemail.com>
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Subject: Re: u-boot debug, was: Re: U-boot on RPI3, sees disk but won't boot
it
Date: Fri, 30 Sep 2022 21:02:58 +0200
References: <A8C2BA4E-4520-4B34-9614-DDC4D8BEB097@yahoo.com>
<6AA65AE6-41F1-405F-A592-7D641EA4C9CF@yahoo.com>
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<20220929151926.GA80020@www.zefox.net>
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To: Mark Millard <marklmi@yahoo.com>,
bob prohaska <fbsd@www.zefox.net>,
freebsd-arm@freebsd.org
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> Am 30.09.2022 um 20:36 schrieb Mark Millard <marklmi@yahoo.com>:
>=20
> Which "the"? The Hub in question is internal to the
> RPi3B. It also shows up on my RPi3B with no external
> hubs involved. (But I've never had the failure mode
> occur.)
>=20
> Manufacturer=20
> Product U-Boot Root Hub
> SerialNumber=20
> bind node usb1@1
>=20
> It is a hub with 5 ports, one associated with the
> EtherNet port and 4 for plugging things in. Or,
> that is my understanding.
:-), I started reading the discussion from the beginning because I =
missed the Hub-manufacturer in the logs,
Now I know it=E2=80=99s the internal, thanks for Info .
I was absolutely sure from the beginning that this is a 3b-power-issue =
(regulator or whatever)=E2=80=A6
I guess you also wrote that.
Since my lowest model is 3b+, I never turned on any RPI during this =
discussion.
>=20
> I've little clue what would interfere with its
> operation in this specific way.
=46rom reading the logs we end up in line 377 of common/usb_hub.c :
'cannot reset port=E2=80=98
The comment beginning in line 305 indicates that perhaps more attempts =
of a reset=20
could work around mysterious power or disconnect issues( although for =
nVidia not rpi).
So by guessing I would say, a code injection of reset retries could =
perhaps help,
I would ask a long year known USB-expert if it=E2=80=99s worth to try =
hacking usb_hub.c=20
but it=E2=80=99s better not to call his name so loud again :-) =E2=80=A6
Regards
Klaus