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[ 1537.183112] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 2002.093236] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 2202.803530] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 2413.754082] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 2428.414524] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 2447.087088] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 2556.726356] perf: interrupt took too long (7940 > 7886), lowering kernel.perf_event_max_sample_rate to 25000 [ 3902.700800] usb 1-6: reset high-speed USB device number 2 using ehci-pci [ 5201.175644] usb 1-6: reset high-speed USB device number 2 using ehci-pci ...
But it doesn't happen all the time. The first one here happened after 1537 seconds (25 minutes) up time.
The only USB device I'm using is a WiFi dongle, which continues to work properly (tho I sometimes connect a USB disk, which also works property). And I've used the WiFi and USB disk for months before getting these messages, which are fairly recent.
Most internet references I've found to these messages show it occurring in kernel 3.X and fixed with a kernel upgrade.
The hardware is rather old (~8 years), but the voltages (via BIOS readout) are definitely within normal range.
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inxi -Fxz System: Host: X Kernel: 4.14.21-041421-generic x86_64 (64 bit gcc: 7.2.0) Desktop: Fluxbox 1.3.5 Distro: Linux Mint 18.3 Sylvia Machine: System: eMachines product: ET1831 Mobo: eMachines model: EMCP73VT-PM Bios: AMI v: P01-A1 date: 09/14/2009 CPU: Dual core Pentium E5400 (-MCP-) cache: 2048 KB flags: (lm nx sse sse2 sse3 ssse3 vmx) bmips: 10799 clock speeds: max: 2700 MHz 1: 1525 MHz 2: 1347 MHz Graphics: Card: NVIDIA G98 [GeForce 8400 GS Rev. 2] bus-ID: 02:00.0 Display Server: X.Org 1.18.4 drivers: (unloaded: fbdev,vesa) Resolution: email@example.com GLX Renderer: NV98 GLX Version: 3.0 Mesa 17.2.8 Direct Rendering: Yes Audio: Card Creative Labs SB Live! EMU10k1 driver: snd_emu10k1 port: cc00 bus-ID: 01:04.0 Sound: Advanced Linux Sound Architecture v: k4.14.21-041421-generic Network: Card: Edimax EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] driver: rtl8192cu usb-ID: 001-003 IF: wlx74da383b4124 state: up mac: <filter> Drives: HDD Total Size: 240.1GB (21.7% used) ID-1: /dev/sda model: PNY_CS1311_240GB size: 240.1GB Partition: ID-1: / size: 29G used: 5.2G (19%) fs: ext4 dev: /dev/sda2 ID-2: swap-1 size: 2.10GB used: 0.00GB (0%) fs: swap dev: /dev/sda5 RAID: No RAID devices: /proc/mdstat, md_mod kernel module present Sensors: System Temperatures: cpu: 40.0C mobo: N/A gpu: 75.0 Fan Speeds (in rpm): cpu: N/A Info: Processes: 141 Uptime: 3:12 Memory: 739.9/3941.2MB Init: systemd runlevel: 5 Gcc sys: 5.4.0 Client: Shell (bash 4.3.481) inxi: 2.2.35