Do you think _FLR's declaration would include any possible dmesg error and warning?
Well, I guess you could always look up dmesg source code, but I don't know if it would just print out hardware errors as reported by interfaces themselves. Also, is there anything you find worrying in my dmesg output? I am getting many "usb 1-1.1: clear tt 1 (0060) error -71" and a few "sdhci-pci 0000:02:00.0: no hotplug settings from platform" ~ ... dmesg > "${_LOG}" _FLR="error\|fail\|invalid\|missing\|refus\|can\'t\|cannot\|don\'t\| no \| not " cat "${_LOG}" | grep -i "${_FLR}" [ 0.302208] \_SB_.PCI0:_OSC invalid UUID [ 0.302212] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM [ 0.323459] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM [ 0.342523] system 00:00: [io 0x0400-0x047f] could not be reserved [ 0.344530] system 00:06: [mem 0xfee00000-0xfeefffff] could not be reserved [ 0.964253] alg: No test for stdrng (krng) [ 0.965378] GHES: HEST is not enabled! [ 1.320097] isapnp: No Plug & Play device found [ 1.331964] PM: Hibernation image not present or could not be loaded. [ 1.374839] ehci-pci 0000:00:1a.0: cache line size of 64 is not supported [ 1.380434] mmc0: no vqmmc regulator found [ 1.380436] mmc0: no vmmc regulator found [ 1.380669] sdhci-pci 0000:02:00.2: Refusing to bind to secondary interface. [ 2.245346] ehci-pci 0000:00:1d.0: cache line size of 64 is not supported [ 19.384026] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory. [ 22.580340] lp: driver loaded but no devices found [ 68.402812] alg: No test for crc32 (crc32-pclmul) [ 96.519515] r8169 0000:04:00.0: firmware: failed to load rtl_nic/rtl8168d-2.fw (-2) [ 96.519595] r8169 0000:04:00.0: Direct firmware load failed with error -2 [ 469.902042] sdhci-pci 0000:02:00.0: no hotplug settings from platform [ 469.902062] pci 0000:02:00.2: no hotplug settings from platform [ 469.902081] jmb38x_ms 0000:02:00.3: no hotplug settings from platform [ 469.902101] pci 0000:02:00.4: no hotplug settings from platform [ 469.902161] r8169 0000:04:00.0: no hotplug settings from platform [ 1726.023837] usb 1-1.1: clear tt 1 (0060) error -71 ~ lbrtchx debian-live@lists.debian.org: trying to parse all warnings and errors out of dmesg output ...