From: Alan Stern <stern@rowland.harvard.edu>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
Matt Corallo <oc2udbzfd@mattcorallo.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-amlogic@lists.infradead.org"
<linux-amlogic@lists.infradead.org>,
"linux.amoon@gmail.com" <linux.amoon@gmail.com>,
Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Subject: Re: ODROID-C1/-C2 USB Detection only triggered by some devices dwc2
Date: Mon, 19 Jul 2021 11:03:48 -0400 [thread overview]
Message-ID: <20210719150348.GB565905@rowland.harvard.edu> (raw)
In-Reply-To: <20210719145322.GA565905@rowland.harvard.edu>
On Mon, Jul 19, 2021 at 10:53:22AM -0400, Alan Stern wrote:
> If this doesn't work, I think the only solution will be a kernel patch.
One other thought: It may be that the reason the Corsair drive and
others don't work when they are plugged in before boot-up is because
they are too slow to connect to the USB bus. That would cause the
Genesys Logic hub to go into runtime suspend before the drive is
detected, and then the hub never resumes because its remote wakeup
support is faulty.
You can test this guess by plugging the Corsair drive into the Odroid
before booting, and adding "usbcore.autosuspend=10" to the boot command
line. This will cause the hub to delay for ten seconds before going
into runtime suspend, and that might be enough time for the drive to
connect to the bus and be detected.
Alan Stern
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next prev parent reply other threads:[~2021-07-19 15:03 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-28 0:32 ODROID-C1/-C2 USB Detection only triggered by some devices Matt Corallo
2021-06-28 0:58 ` Alan Stern
2021-06-28 1:05 ` Matt Corallo
2021-06-28 1:16 ` Alan Stern
2021-06-28 1:24 ` Matt Corallo
2021-06-28 14:24 ` Alan Stern
2021-06-28 18:37 ` Martin Blumenstingl
2021-06-29 15:05 ` Alan Stern
2021-06-29 15:51 ` Martin Blumenstingl
2021-06-29 16:18 ` Alan Stern
2021-06-29 16:30 ` Martin Blumenstingl
2021-06-30 0:35 ` Alan Stern
2021-07-01 10:03 ` Anand Moon
2021-07-01 21:18 ` Martin Blumenstingl
2021-07-02 19:11 ` Anand Moon
2021-07-02 19:33 ` Martin Blumenstingl
[not found] ` <CANAwSgQH6HgFQ+xz15AoKhGUF9G18P-cHOVL2FvS_34FrW=bzQ@mail.gmail.com>
2021-07-13 15:41 ` Martin Blumenstingl
2021-06-30 23:09 ` Martin Blumenstingl
2021-07-10 17:07 ` Martin Blumenstingl
2021-07-11 8:15 ` ODROID-C1/-C2 USB Detection only triggered by some devices dwc2 Minas Harutyunyan
2021-07-11 17:56 ` Martin Blumenstingl
2021-07-12 6:42 ` Minas Harutyunyan
2021-07-12 11:35 ` Martin Blumenstingl
2021-07-14 15:27 ` Minas Harutyunyan
2021-07-14 23:16 ` Martin Blumenstingl
2021-07-15 1:44 ` Alan Stern
2021-07-15 2:04 ` Alan Stern
2021-07-18 21:24 ` Martin Blumenstingl
2021-07-19 14:53 ` Alan Stern
2021-07-19 15:03 ` Alan Stern [this message]
2021-07-20 21:55 ` Martin Blumenstingl
2021-07-21 15:58 ` Alan Stern
2021-08-03 20:20 ` Martin Blumenstingl
2021-08-03 21:32 ` Alan Stern
2021-12-12 16:08 ` Martin Blumenstingl
2022-01-10 22:05 ` Martin Blumenstingl
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