Re: Linux warns `usb: port power management may be unreliable` on several systems

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Dear fwts folks,


Am 15.02.24 um 12:12 schrieb Mathias Nyman:

On 14.2.2024 15.00, Mathias Nyman wrote:

On 14.2.2024 14.58, Mathias Nyman wrote:

On 14.2.2024 11.31, Paul Menzel wrote:
As a follow-up to *Linux warning `usb: port power management may be unreliable` on Dell XPS 13 9360* [1][2], Linux warns about this on Dell laptops, desktops, and servers, and also on devices from other manufacturers [3].
Is this a firmware issue or a Linux one? As a user I am unsure what to do, and ignoring warnings sounds wrong to me. 

At a fist glance it looks like a firmware issue.

USB2 and USB3 ports are in this case matched and peered based on the
ports ACPI _PLD (Physical Device Location) entries.
Usually there is only one USB2 and one USB3 port with exactly the same
_PLD values, but here it appears more ports return similar _PLD values.


Looks like these machines have _PLD ACPI objects for all USB ports,
including unusable USB host ports that are not wired to any connector
or internal device.

All these unusable ports return similar _PLD objects, with zeroes in
their group token and position fields. This confuses the port peering
code pairing USB2 and USB3 ports that are wired to the same
connector.

These unusable ports have a ACPI _UPC object stating they are not
connectable. We could probably tune the port peering code for those.
At least skip the warning messages.
Mathias posted patches [4][5] fixing this issue, but it sounds like a firmware issue to me. Would that be something fwts [6][7] could check for? 


Kind regards,

Paul
[1]: https://lore.kernel.org/linux-usb/210f8e5d-aa78-41f7-a9ce-2584274f1848@xxxxxxxxxxxxx/T/#t 
[2]: https://bugzilla.kernel.org/show_bug.cgi?id=218465
"Linux warning `usb: port power management may be unreliable` on Dell XPS 13 9360" 
[3]: https://github.com/linuxhw/Dmesg
[4]: https://lore.kernel.org/linux-usb/20240222133819.4149388-2-mathias.nyman@xxxxxxxxxxxxxxx/ [5]: https://lore.kernel.org/linux-usb/20240222233343.71856-1-mathias.nyman@xxxxxxxxxxxxxxx/ 
[6]: https://wiki.ubuntu.com/FirmwareTestSuite/Reference
[7]: https://github.com/fwts/fwts/



PS: First 100 hits in the Linux messages git archive [3]:


```
linux-hardware-dmesg (main)$ git grep "ay be unreliable" | head -100
All In One/AIO/H87/H87H3-TI/C951D8E52EFC/LINUXMINT-20.2/5.4.0-100-GENERIC/X86_64/40CE8C87CB:[ 0.650585] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 22 V222UA/9F8A84B648C2/ENDLESS-3.4.1/4.15.0-22-GENERIC/X86_64/E0EF808E3F:[ 0.550937] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_A6521FA/262E2C088492/RED-OS-7.3.2/5.15.72-1.EL7.3.X86_64/X86_64/24ED481783:[ 0.522930] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/226F591F8280/ENDLESS-3.8.6/5.4.0-42-GENERIC/X86_64/0EA91E4E6B:[ 0.863317] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/226F591F8280/ENDLESS-3.9.1/5.8.0-14-GENERIC/X86_64/9A5F760EC7:[ 1.375329] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/2332A3C0017B/ENDLESS-3.7.8/5.3.0-28-GENERIC/X86_64/74D86F694A:[ 0.833766] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/3602C27EA430/ENDLESS-3.8.4/5.4.0-19-GENERIC/X86_64/2AF0AF630C:[ 0.865505] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/3602C27EA430/ENDLESS-3.8.6/5.4.0-42-GENERIC/X86_64/653FDB0EE6:[ 0.869166] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/3602C27EA430/ENDLESS-3.9.4/5.8.0-14-GENERIC/X86_64/AB5720591E:[ 1.344398] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FA_V241FA/3602C27EA430/ENDLESS-3.9.6/5.8.0-14-GENERIC/X86_64/60C6C7EA7C:[ 1.341951] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FF_A6521FF/856843130D4D/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/52140CEEC0:[ 1.353997] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FF_A6521FF/856843130D4D/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/702C97C47B:[ 1.353997] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FF_V241FF/7000C1D5524B/ENDLESS-3.9.3/5.8.0-14-GENERIC/X86_64/72FCC11E52:[ 1.264174] usb: port power management may be unreliable All In One/ASUSTek Computer/Vivo/Vivo AIO 24 V241FF_V241FF/B16A1F0445CB/ENDLESS-3.9.4/5.8.0-14-GENERIC/X86_64/A9A286F67B:[ 1.347540] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/2C64F2D7482B/ENDLESS-3.3.16-NEXTHW1/4.15.0-12-GENERIC/X86_64/5070ED2282:[ 0.665420] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/2C64F2D7482B/ENDLESS-3.3.16-NEXTHW1/4.15.0-12-GENERIC/X86_64/80FF2C9A96:[ 0.665420] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/2C64F2D7482B/ENDLESS-3.3.19-NEXTHW1/4.15.0-15-GENERIC/X86_64/191C1A1A94:[ 0.664096] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/2C64F2D7482B/ENDLESS-3.3.19-NEXTHW1/4.15.0-15-GENERIC/X86_64/949FF85DC9:[ 0.635980] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/2C64F2D7482B/ENDLESS-3.3.19-NEXTHW1/4.15.0-15-GENERIC/X86_64/D633DC9722:[ 0.635980] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/2C64F2D7482B/ENDLESS-3.5.1/4.18.0-10-GENERIC/X86_64/B9D07EAAFE:[ 0.711346] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/72345B40DF12/OPENMANDRIVA-4.3/5.16.13-DESKTOP-1OMV4003/X86_64/2E0A195007:[ 1.915921] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/72345B40DF12/UBUNTU-20.04/5.8.0-53-GENERIC/X86_64/0EF1F4F50D:[ 0.887317] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/72345B40DF12/UBUNTU-20.04/5.8.0-53-GENERIC/X86_64/FDC38A2185:[ 0.910744] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/76051F2C7080/KDE-NEON-20.04/5.13.0-35-GENERIC/X86_64/D3DB12130F:[ 0.927905] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/89FE20662EF5/ENDLESS-3.7.7/5.3.0-28-GENERIC/X86_64/8434301194:[ 0.956868] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/A87B47004B14/ENDLESS-3.3.16-NEXTHW1/4.15.0-12-GENERIC/X86_64/C861864ED7:[ 0.664109] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/CAE70310F314/ENDLESS-3.9.4/5.8.0-14-GENERIC/X86_64/66808639C4:[ 1.510309] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/CAE70310F314/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/207D9F3DF9:[ 1.523026] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/CAE70310F314/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/2CC529923F:[ 1.506792] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/CAE70310F314/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/70014EA10E:[ 1.559157] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-865/CAE70310F314/UBUNTU/5.8.0-14-GENERIC/X86_64/E51EF67C3C:[ 1.509910] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-963/AB390A2C3656/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/30F1B16098:[ 1.109351] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C22-963/AB390A2C3656/ENDLESS-3.9.5/5.8.0-14-GENERIC/X86_64/9AC8D3D065:[ 1.109351] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-420/1D8955841971/ENDLESS-3.9.7/5.8.0-14-GENERIC/X86_64/04C483EE9B:[ 2.836153] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-860/422CCDC0D82D/OPENMANDRIVA-23.01/6.1.1-DESKTOP-1OMV2290/X86_64/AB25618998:[ 2.517040] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-860/521E90F01878/ENDLESS-3.9.3/5.8.0-14-GENERIC/X86_64/EE48661CED:[ 1.771622] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/186914CED252/KUBUNTU-19.10/5.3.0-29-GENERIC/X86_64/4EC6B3F5DC:[ 0.619494] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/186914CED252/KUBUNTU-19.10/5.3.0-29-GENERIC/X86_64/660EA9C3A5:[ 0.619494] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/186914CED252/KUBUNTU-20.04/5.4.0-45-GENERIC/X86_64/68D89317DC:[ 0.693613] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/186914CED252/KUBUNTU-20.04/5.4.0-45-GENERIC/X86_64/B10A4E5810:[ 0.693613] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/21BB50F83EA2/FEDORA-34/5.11.15-300.FC34.X86_64/X86_64/EB23862DED:[ 0.729864] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/42C297513CDB/UBUNTU-19.04/5.0.0-16-GENERIC/X86_64/2288828F06:[ 0.919194] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/AD00670C5A58/ROSA-12.2/5.10.74-GENERIC-2ROSA2021.1-X86_64/X86_64/873C58A401:[ 2.316468] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/AD00670C5A58/ROSA-12.2/5.10.74-GENERIC-2ROSA2021.1-X86_64/X86_64/961F1373A2:[ 2.336592] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/AD00670C5A58/ROSA-12.2/5.10.74-GENERIC-2ROSA2021.1-X86_64/X86_64/E61762236D:[ 2.361173] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-865/C6582B079E94/OPENMANDRIVA-4.2/5.10.14-DESKTOP-1OMV4002/X86_64/6DC98B8074:[ 1.787340] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/77A9AFE95967/ENDLESS-3.7.6/5.3.0-23-GENERIC/X86_64/D8FFD8A934:[ 0.823592] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/CC4A926A8703/ROSA-12/5.10.71-GENERIC-1ROSA2021.1-X86_64/X86_64/9B4659E4DD:[ 2.473583] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/CC4A926A8703/ROSA-R12/5.10.56-GENERIC-1ROSA2021.1-X86_64/X86_64/01D4780C32:[ 2.450866] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/CC4A926A8703/ROSA-R12/5.10.70-GENERIC-2ROSA2021.1-X86_64/X86_64/215146C423:[ 2.455238] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/CCB33D17B7C6/ZORIN-16/5.15.0-53-GENERIC/X86_64/4F517E816D:[ 1.017371] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/CCB33D17B7C6/ZORIN-16/5.15.0-56-GENERIC/X86_64/AB421FD2D4:[ 0.625572] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C24-963/E4A4E93BCF0A/RED-OS-7.3/5.15.87-1.EL7.3.X86_64/X86_64/7B4EEEBDBC:[ 0.724577] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-1655/38F1D8798E6E/RED-OS-7.3.2/5.15.87-1.EL7.3.X86_64/X86_64/4FE6CA7F88:[ 0.751172] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-1655/AA5A69D17335/ALT-8.4/5.10.110-STD-DEF-ALT0.C9F.2/X86_64/96E5D68181:[ 0.947771] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-1655/F58A44B9C206/UBUNTUSTUDIO-20.04/5.13.0-40-LOWLATENCY/X86_64/AFF1557D72:[ 0.741138] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-1655/F58A44B9C206/UBUNTUSTUDIO-20.04/5.17.1-051701-GENERIC/X86_64/A87F9DE14E:[ 0.799120] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/0BC43D485BC1/ENDLESS-3.8.7/5.4.0-42-GENERIC/X86_64/087592F760:[ 1.824861] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/0BC43D485BC1/ENDLESS-3.8.7/5.4.0-42-GENERIC/X86_64/0FD8D844C5:[ 1.834120] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/0BC43D485BC1/ENDLESS-3.8.7/5.4.0-42-GENERIC/X86_64/AB58D02A20:[ 1.821996] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/0BC43D485BC1/ENDLESS-3.8.7/5.4.0-42-GENERIC/X86_64/CC29336BB3:[ 1.824861] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/0D6785EE4B93/OPENMANDRIVA-23.01/6.1.1-DESKTOP-1OMV2290/X86_64/D801E40F8C:[ 1.758023] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/405BF25F53D1/KUBUNTU-20.04/5.4.0-47-GENERIC/X86_64/679E8852DF:[ 0.854000] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/563F493FD77F/OPENMANDRIVA-23.03/6.2.6-DESKTOP-1OMV2390/X86_64/A82A90955E:[ 1.415729] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/563F493FD77F/OPENMANDRIVA-4.90/5.18.12-DESKTOP-3OMV4090/X86_64/F8A944DF6F:[ 1.441382] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/93EEE25E2034/ENDLESS-3.8.6/5.4.0-42-GENERIC/X86_64/BF2053E277:[ 1.560914] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/93EEE25E2034/ENDLESS-3.9.0/5.8.0-14-GENERIC/X86_64/B886538A18:[ 1.895375] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/93EEE25E2034/ENDLESS-3.9.3/5.8.0-14-GENERIC/X86_64/17E53BFE31:[ 1.910578] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/93EEE25E2034/ENDLESS-3.9.3/5.8.0-14-GENERIC/X86_64/5820A2D4C3:[ 1.899581] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/A23104408196/LINUXMINT-20.3/5.4.0-92-GENERIC/X86_64/F15CA34264:[ 1.090331] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire C27-962/AAB4DC68AC2E/ENDEAVOUROS-ROLLING/5.13.4-ARCH2-1/X86_64/75E1D7295C:[ 1.095398] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire S24-880/00A232C06A58/OPENMANDRIVA-4.50/5.19.12-DESKTOP-2OMV4090/X86_64/A255155F98:[ 1.709588] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire V3-772G/D65C7FD04328/ARCH-ROLLING/5.9.4-ARCH1-1/X86_64/63B708B27B:[ 3.102833] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z1-622/12DC70B153E8/ROSA-2016.1/4.9.60-NRJ-DESKTOP-1ROSA-X86_64/X86_64/350CC83AC7:[ 6.340598] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z1-751/6ED6D0CF15D0/UBUNTU-20.04/5.8.0-48-GENERIC/X86_64/088EE04D43:[ 1.603326] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z1-751/6ED6D0CF15D0/UBUNTU-20.04/5.8.0-50-GENERIC/X86_64/6CCA1F0784:[ 1.602219] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z24-890/BC3051D49BF1/UBUNTU-16.04/4.4.0-177-GENERIC/X86_64/C1339E884A:[ 0.846488] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z3-600/BD66BD02AA7B/OPENMANDRIVA-23.03/6.2.6-DESKTOP-1OMV2390/X86_64/A2921975CD:[ 5.353925] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z3-600/C4DD4E20E239/UBUNTU-18.04/5.0.0-37-GENERIC/X86_64/95465E168F:[ 1.739941] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire Z3-705/160DDCD6E651/ROSA-2014.1/4.1.25-NRJ-DESKTOP-1ROSA-X86_64/X86_64/E7395D0EE2:[ 1.422223] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire ZC-606/4574857FD00B/UBUNTU-20.04/5.11.0-40-GENERIC/X86_64/2972DF8D64:[ 1.854473] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire ZC-606/F618C756E258/ROSA-2016.1/4.9.60-NRJ-DESKTOP-1ROSA-X86_64/X86_64/7048174273:[ 4.917425] usb: port power management may be unreliable All In One/Acer/Aspire/Aspire ZC-606/F618C756E258/ROSA-2016.1/4.9.76-NRJ-DESKTOP-1ROSA-X86_64/X86_64/90FF435FAD:[ 4.069505] usb: port power management may be unreliable All In One/Acer/Veriton/Veriton Z4810G/E8AB5315A5E7/UBUNTU-20.04/5.15.0-43-GENERIC/X86_64/D85C47C623:[ 0.701649] usb: port power management may be unreliable All In One/Acer/Veriton/Veriton Z4810G/E8AB5315A5E7/UBUNTU-22.04/5.19.0-38-GENERIC/X86_64/C4A9881345:[ 1.198923] usb: port power management may be unreliable All In One/Acidanthera/iMac16/iMac16,1/594881FEE753/OPENMANDRIVA-4.50/5.19.5-DESKTOP-1OMV4090/X86_64/0E9B82F312:[ 3.930212] usb: port power management may be unreliable All In One/Acidanthera/iMac18/iMac18,3/5F24E52E7730/LINUXMINT-21.1/5.15.0-58-GENERIC/X86_64/70BD257F2C:[ 1.259378] usb: port power management may be unreliable All In One/Acidanthera/iMac18/iMac18,3/5F24E52E7730/LINUXMINT-21/5.15.0-56-GENERIC/X86_64/405443FC24:[ 1.273375] usb: port power management may be unreliable All In One/Acidanthera/iMac18/iMac18,3/5F24E52E7730/LINUXMINT-21/5.15.0-56-GENERIC/X86_64/AEFCE63130:[ 1.308855] usb: port power management may be unreliable All In One/Acidanthera/iMac20/iMac20,1/1EB5BA2AB9E0/ELEMENTARY-6.1/5.15.0-56-GENERIC/X86_64/4EFE19137D:[ 0.742582] usb: port power management may be unreliable All In One/Acidanthera/iMacPro1/iMacPro1,1/2499D9B10F2B/NOBARA-37/6.2.6-201.FSYNC.FC37.X86_64/X86_64/EBA8868F8B:[ 1.095741] usb: port power management may be unreliable All In One/Acidanthera/iMacPro1/iMacPro1,1/9A30E1010885/ARCH/5.9.10-ARCH1-1/X86_64/42B182D5F0:[ 3.612607] usb: port power management may be unreliable All In One/Acidanthera/iMacPro1/iMacPro1,1/BF28891431B4/UBUNTU-20.04/5.4.0-37-GENERIC/X86_64/FC4BF98DC2:[ 0.288941] usb: port power management may be unreliable All In One/Acidanthera/iMacPro1/iMacPro1,1/CCEF88A1D848/UBUNTU-22.04/5.19.0-32-GENERIC/X86_64/13A42307A4:[ 1.950960] usb: port power management may be unreliable All In One/Apple/iMac16/iMac16,1/36F3548CFB1A/ROSA-2016.1/4.9.41-NRJ-DESKTOP-1ROSA-X86_64/X86_64/A90AA5D34B:[ 2.869734] usb: port power management may be unreliable All In One/Apple/iMac16/iMac16,1/4BCFE045F418/POP!_OS-21.04/5.13.0-7620-GENERIC/X86_64/6514199D0C:[ 1.080389] usb: port power management may be unreliable All In One/Apple/iMac16/iMac16,1/8D6EBF97728F/ROSA-2016.1/4.15.0-DESKTOP-47.2ROSA-X86_64/X86_64/906BCD4AC8:[ 1.526534] usb: port power management may be unreliable All In One/Apple/iMac16/iMac16,1/B46A60C60F7F/OPENMANDRIVA-4.50/5.12.4-DESKTOP-1OMV4050/X86_64/F800A67D4D:[ 2.784742] usb: port power management may be unreliable All In One/Apple/iMac16/iMac16,1/E5DA8CE02497/LINUXMINT-20.2/5.4.0-89-GENERIC/X86_64/14FA707392:[ 0.844179] usb: port power management may be unreliable All In One/Apple/iMac16/iMac16,1/E5DA8CE02497/LINUXMINT-20.2/5.4.0-89-GENERIC/X86_64/9FE896D123:[ 0.844179] usb: port power management may be unreliable 
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