From: bugzilla-daemon@bugzilla.kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 207219] [BISECTED] Sony Vaio laptop built-in ricoh webcam no longer found on Fedora 31 with 5.4.11 kernel
Date: Mon, 13 Apr 2020 17:16:14 +0000 [thread overview]
Message-ID: <bug-207219-208809-Mc3pDDkhjp@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-207219-208809@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=207219
--- Comment #1 from Alan Stern (stern@rowland.harvard.edu) ---
You should collect usbmon traces showing what happens when the camera is
initialized, under both a good and a bad kernel. The best way to do this is
probably:
cat /sys/kernel/debug/usb/usbmon/1u >OUTPUT-FILENAME &
echo 0 >/sys/bus/usb/devices/1-1/bConfigurationValue
echo 1 >/sys/bus/usb/devices/1-1/bConfigurationValue
... wait a few seconds ...
fg
^C
It's obvious that the camera is sending nonsense data to the system; maybe the
trace will help show why.
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next prev parent reply other threads:[~2020-04-13 17:16 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-12 23:35 [Bug 207219] New: [BISECTED] Sony Vaio laptop built-in ricoh webcam no longer found on Fedora 31 with 5.4.11 kernel bugzilla-daemon
2020-04-13 17:16 ` bugzilla-daemon [this message]
2020-04-13 17:54 ` [Bug 207219] " bugzilla-daemon
2020-04-13 17:54 ` bugzilla-daemon
2020-04-14 15:19 ` bugzilla-daemon
2020-04-14 21:59 ` bugzilla-daemon
2020-04-15 1:26 ` Alan Stern
2020-04-15 1:26 ` bugzilla-daemon
2020-04-16 23:22 ` bugzilla-daemon
2020-04-17 15:24 ` bugzilla-daemon
2020-04-25 21:51 ` bugzilla-daemon
2020-04-26 14:25 ` bugzilla-daemon
2020-04-26 17:55 ` bugzilla-daemon
2020-04-26 21:07 ` bugzilla-daemon
2020-04-27 17:26 ` bugzilla-daemon
2020-04-28 18:44 ` bugzilla-daemon
2020-04-28 22:17 ` bugzilla-daemon
2020-04-30 16:49 ` bugzilla-daemon
2020-04-30 23:26 ` bugzilla-daemon
2020-05-01 19:21 ` bugzilla-daemon
2020-05-01 21:55 ` bugzilla-daemon
2020-05-02 1:52 ` bugzilla-daemon
2020-05-02 2:57 ` bugzilla-daemon
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