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Date:   Sat, 4 Apr 2020 20:47:32 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     kernel list <linux-kernel@vger.kernel.org>, hverkuil@xs4all.nl,
        linux-media@vger.kernel.org
Cc:     linux@rainbow-software.org, kilgota@auburn.edu, moinejf@free.fr
Subject: gspca webcam: need to plug it 5 times before it works
Message-ID: <20200404184732.GA17534@duo.ucw.cz>
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Hi!

=2E.but if I'm patient enough, it eventually starts working... somehow.

Incoming data seems to go in reliably. Outgoing commands (such as
change gain) don't seem to be unreliable.

Any idea how to debug / what could be wrong?

Thanks,
								Pavel


[36790.733135] usb 2-1.1: USB disconnect, device number 30
[39686.814093] usb 2-1.1: new high-speed USB device number 33 using ehci-pci
[39686.853138] usb 2-1.1: New USB device found, idVendor=3D2770, idProduct=
=3D930c, bcdDevice=3D 1.00
[39686.853162] usb 2-1.1: New USB device strings: Mfr=3D1, Product=3D2, Ser=
ialNumber=3D0
[39686.853178] usb 2-1.1: Product: USB 2.0 PC camera=20
[39686.853193] usb 2-1.1: Manufacturer: SQ Tech CO., LTD.
[39686.859210] gspca_main: sq930x-2.14.0 probing 2770:930c
[39688.769984] gspca_sq930x: Unknown sensor
[39688.770037] sq930x: probe of 2-1.1:1.0 failed with error -22
[39748.021772] usb 2-1.1: USB disconnect, device number 33
[39754.901755] usb 2-1.1: new high-speed USB device number 34 using ehci-pci
[39754.940668] usb 2-1.1: New USB device found, idVendor=3D2770, idProduct=
=3D930c, bcdDevice=3D 1.00
[39754.940688] usb 2-1.1: New USB device strings: Mfr=3D1, Product=3D2, Ser=
ialNumber=3D0
[39754.940700] usb 2-1.1: Product: USB 2.0 PC camera=20
[39754.940710] usb 2-1.1: Manufacturer: SQ Tech CO., LTD.
[39754.944401] gspca_main: sq930x-2.14.0 probing 2770:930c
[39756.845672] gspca_sq930x: Unknown sensor
[39756.845750] sq930x: probe of 2-1.1:1.0 failed with error -22
[39759.797800] usb 2-1.1: USB disconnect, device number 34
[39763.349750] usb 2-1.1: new high-speed USB device number 35 using ehci-pci
[39763.389838] usb 2-1.1: New USB device found, idVendor=3D2770, idProduct=
=3D930c, bcdDevice=3D 1.00
[39763.389859] usb 2-1.1: New USB device strings: Mfr=3D1, Product=3D2, Ser=
ialNumber=3D0
[39763.389871] usb 2-1.1: Product: USB 2.0 PC camera=20
[39763.389882] usb 2-1.1: Manufacturer: SQ Tech CO., LTD.
[39763.391369] gspca_main: sq930x-2.14.0 probing 2770:930c
[39765.297703] gspca_sq930x: Unknown sensor
[39765.297787] sq930x: probe of 2-1.1:1.0 failed with error -22
[39775.669563] usb 2-1.1: USB disconnect, device number 35
[39779.477651] usb 2-1.1: new high-speed USB device number 36 using ehci-pci
[39779.517205] usb 2-1.1: New USB device found, idVendor=3D2770, idProduct=
=3D930c, bcdDevice=3D 1.00
[39779.517227] usb 2-1.1: New USB device strings: Mfr=3D1, Product=3D2, Ser=
ialNumber=3D0
[39779.517239] usb 2-1.1: Product: USB 2.0 PC camera=20
[39779.517250] usb 2-1.1: Manufacturer: SQ Tech CO., LTD.
[39779.519033] gspca_main: sq930x-2.14.0 probing 2770:930c

--=20
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo=
g.html

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