From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sundtek.de (sundtek.de [85.10.198.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A347418E25 for ; Mon, 18 Nov 2024 08:13:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=85.10.198.106 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731917618; cv=none; b=kqU1/0QgsFXYpmXOysAK5PGZD7Ka4q9rTJhx1v+UZ9bLnqkQpV5rywC/ILcHEaALpQrPDFBQfAnOH+3fe1Tp0Ix1CuaMdI6E0EqH2cARUMkP7NgUui3VHggy4gUE4axjPiiDDGGlWUU5SWE4bZZ8qNk0KSnNcnGw9u1ThXGVaK0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731917618; c=relaxed/simple; bh=IYo4JUx9YwDL9Ip2iaqMzJ9qIIwhfj0QiZNZ86B0IM0=; h=Message-ID:Subject:From:To:Cc:Date:Content-Type:MIME-Version; b=W48O1ww4TSnrwqoPr8SSklW+g6q7fGIdiI6kn0lgPSlMcgYxHAQnWIMe48yyLWeyx6fYo102uV4Bs4+uaAHOFApeBEip/kQDH9aC/G1+FxZcuWYO/imO8Ogthw1RhRccSXAO+6UKRjZ8deE5+BXFcQGoT+B3ZUmUy4m2rv8dj+Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sundtek.de; spf=pass smtp.mailfrom=sundtek.de; arc=none smtp.client-ip=85.10.198.106 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sundtek.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sundtek.de Received: from Debian-exim by sundtek.de with spam-scanned (Exim 4.95) (envelope-from ) id 1tCwt2-000991-U5 for linux-usb@vger.kernel.org; Mon, 18 Nov 2024 09:13:34 +0100 Received: from 220-143-194-41.dynamic-ip.hinet.net ([220.143.194.41] helo=[192.168.2.197]) by sundtek.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tCwt2-00098y-Hx; Mon, 18 Nov 2024 09:13:32 +0100 Message-ID: <77b79e95c092511a695ac0b6a8eade57b12ff3db.camel@sundtek.de> Subject: USB Autosuspend From: Markus Rechberger To: linux-usb@vger.kernel.org Cc: Alan Stern Date: Mon, 18 Nov 2024 16:13:29 +0800 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.3-0ubuntu1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: linuxusb.ml@sundtek.de X-SA-Exim-Scanned: No (on sundtek.de); SAEximRunCond expanded to false Hi, we repeatedly received issues from customers with usb autosuspend, our devices are randomly disconnected on some systems, it did not happen many times but if more than 4-5 customers report this there's usually some real issue behind that. I'm asking here because the Libreelec distribution recently got my attention that they seem to set usb autosuspend to -1 during boot time so they probably figured that out much earlier with other devices. I have never experienced that issue on an Ivy or Haswell based system. Were there some issues with particular kernel versions in the past or are there any issues known in general with USB autosuspend? Best Regards, Markus