Path: csiph.com!aioe.org!fs4vz7lwhQCwq5L3H1slGg.user.46.165.242.75.POSTED!not-for-mail From: "James H. Markowitz" Newsgroups: comp.os.linux.hardware Subject: Re: Intriguing issue Date: Sat, 14 Jan 2023 20:04:09 -0000 (UTC) Organization: Aioe.org NNTP Server Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Info: gioia.aioe.org; logging-data="20275"; posting-host="fs4vz7lwhQCwq5L3H1slGg.user.gioia.aioe.org"; mail-complaints-to="abuse@aioe.org"; User-Agent: Pan/0.149 (Bellevue; 4c157ba git@gitlab.gnome.org:GNOME/pan.git) X-Notice: Filtered by postfilter v. 0.9.2 Xref: csiph.com comp.os.linux.hardware:3613 On Mon, 9 Jan 2023 20:17:09 -0000 (UTC), James H. Markowitz wrote: > I have an external USB hard drive connected to a Linux system. > When I invoke dmesg -T I get diagnostics like the following: > > Mon Jan 9 12:28:08 2023] usb 2-1.4: reset high-speed USB device > number 7 using ehci-pci > > I am guessing that there is some hardware issue with this device. The > thing is, that kind of diagnostic is logged by the kernel exactly every > 50 minutes. Let me emphasize this: exactly every 3,000 seconds. Not > 3,001, or 2,999, but 3,000. > > Anybody have any idea as to why it is exactly 50 minutes? What id > it that may be so special about 50 minutes? It is getting curioser and curioser: I have tried with three more systems, and the diagnostic keeps reappearing in two of them - with the same clockwork 50 minutes frequency - but not at all in the third one - at least it has not for a few days now. Interestingly, this last system is the oldest one of the lot. They are all running exactly the same Linux version. I am mystified.