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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1096714] Re: qemu 1.3.0: usb devices shouldn't have same vendor/product ID and same serial
Date: Wed, 26 Jul 2017 18:00:58 -0000	[thread overview]
Message-ID: <150109205863.31580.16835536325744423471.malone@gac.canonical.com> (raw)
In-Reply-To: 20130107012337.1165.80927.malonedeb@gac.canonical.com

Hi Sven,
  Hmm you do have a point - I wonder if this is fixed on windows by commit 5319dc7 from Gerd in November 2013 that added 'msos-desc' compat properties; but I see your point about having the same IDs

(ccing in Gerd)

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https://bugs.launchpad.net/bugs/1096714

Title:
  qemu 1.3.0: usb devices shouldn't have same vendor/product ID and same
  serial

Status in QEMU:
  New

Bug description:
  Boot Windows XP with
  ./qemu-system-i386 -device pci-ohci -device usb-tablet
  and then with
  ./qemu-system-i386 -device pci-ohci -device usb-kbd

  and you will notice, that the usb keyboard is not detected. In fact,
  Windows XP detects the usb tablet and loads the driver for the tablet
  instead of the driver for the keyboard.

  The problem seems to be, that vendor and product ID and even the
  seriel of both the usb tablet and the usb keyboard are the same as an
  lsusb reveiles. Hence, Windows XP doesn't detect when you replace the
  tablet by a keyboard and vice versa. I didn't check other USB devices,
  but it seems a bad idea to me to have devices with the same
  vendor/product Id. I'm not aware, whether it is sufficient to change
  the seriel numbers of the devices.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1096714/+subscriptions

  parent reply	other threads:[~2017-07-26 18:16 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-07  1:23 [Qemu-devel] [Bug 1096714] [NEW] qemu 1.3.0: usb devices shouldn't have same vendor/product ID and same serial Sven
2017-07-26 16:24 ` [Qemu-devel] [Bug 1096714] " Michal Suchanek
2017-07-26 17:03 ` Sven
2017-07-26 18:00 ` Dr. David Alan Gilbert [this message]
2017-07-27  8:22 ` Gerd Hoffmann
2017-07-27 14:20 ` Michal Suchanek
2021-05-03 11:27 ` Thomas Huth

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