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* -1.0 ALL_TRUSTED Nachricht wurde nur =fcber vertrauensw=fcrdige Rechner * weitergeleitet * -1.9 BAYES_00 BODY: Spamwahrscheinlichkeit nach Bayes-Test: 0-1% * [score: 0.0000] * 0.0 TVD_RCVD_IP Message was received from an IP address?= X-Spam-Level: Received: from 111-254-20-73.dynamic-ip.hinet.net ([111.254.20.73] 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 1tNr3k-00DNir-6s; Wed, 18 Dec 2024 11:13:40 +0100 Message-ID: <4e5403bfeaa656a42f145c217ccc7e58c993bca6.camel@sundtek.de> Subject: Re: USB Autosuspend From: Markus Rechberger To: Alan Stern Cc: linux-usb@vger.kernel.org Date: Wed, 18 Dec 2024 18:13:35 +0800 In-Reply-To: <3e9d6d03-eed7-4f46-9926-4d395c0bc46d@rowland.harvard.edu> References: <77b79e95c092511a695ac0b6a8eade57b12ff3db.camel@sundtek.de> <3e9d6d03-eed7-4f46-9926-4d395c0bc46d@rowland.harvard.edu> 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 On Mon, 2024-11-18 at 22:11 -0500, Alan Stern wrote: > On Mon, Nov 18, 2024 at 04:13:29PM +0800, Markus Rechberger wrote: > > Hi, > >=20 > > 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. > >=20 > > 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. > >=20 > > Were there some issues with particular kernel versions in the past > > or > > are there any issues known in general with USB autosuspend? >=20 > I'm not aware of any such issues. >=20 > Do you think you can get kernel debugging logs from your customers=20 > showing examples of these disconnections? >=20 one customer just replied his problem is gone since he disabled auto suspend (that was the latest one). He tested it since the last mail to the mailing list. Do you want any particular logfiles / logging from him? Best Regards, Markus > Alan Stern >=20