Bug 218487

Summary:	Linux warning `usb: port power management may be unreliable` on Dell OptiPlex 5055
Product:	Drivers	Reporter:	Paul Menzel (pmenzel+bugzilla.kernel.org)
Component:	USB	Assignee:	Default virtual assignee for Drivers/USB (drivers_usb)
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	mathias.nyman, pmenzel+bugzilla.kernel.org
Priority:	P3
Hardware:	All
OS:	Linux
Kernel Version:		Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Linux 6.6.12 messages (output of `dmesg`) with system firmware 1.1.50 Output of `acpidump` with system firmware 1.1.50 Linux 6.8-rc6+ messages with v2 patches (output of `dmesg`) with `usbcore.dyndbg=+p` and with system firmware 1.1.20

Description Paul Menzel 2024-02-13 13:21:25 UTC

Created attachment 305861 [details]
Linux 6.6.12 messages (output of `dmesg`) with system firmware 1.1.50

On the Dell OptiPlex 5055 with at least system firmware version 1.1.50, Linux 6.6.12 warns:

    $ dmesg | grep "be unreliable"
    [    3.289270] usb: port power management may be unreliable
    $ dmesg | grep -e "DMI:" -e "Linux version" -e microcode
    [    0.000000] Linux version 6.6.12.mx64.461 (root@theinternet.molgen.mpg.de) (gcc (GCC) 12.3.0, GNU ld (GNU Binutils) 2.41) #1 SMP PREEMPT_DYNAMIC Thu Jan 18 10:47:08 CET 2024
    [    0.000000] DMI: Dell Inc. OptiPlex 5055 Ryzen CPU/0P03DX, BIOS 1.1.50 07/28/2021
    [    3.488086] microcode: CPU0: patch_level=0x08001137
    [    3.488088] microcode: CPU2: patch_level=0x08001137
    [    3.488088] microcode: CPU3: patch_level=0x08001137
    [    3.488091] microcode: CPU1: patch_level=0x08001137
    [    3.488094] microcode: CPU6: patch_level=0x08001137
    [    3.488094] microcode: CPU5: patch_level=0x08001137
    [    3.488095] microcode: CPU7: patch_level=0x08001137
    [    3.530149] microcode: CPU4: patch_level=0x08001137
    [    3.530171] microcode: Microcode Update Driver: v2.2.
    $ usb-devices

    T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh=10
    D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
    P:  Vendor=1d6b ProdID=0002 Rev=06.06
    S:  Manufacturer=Linux 6.6.12.mx64.461 xhci-hcd
    S:  Product=xHCI Host Controller
    S:  SerialNumber=0000:01:00.0
    C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

    T:  Bus=01 Lev=01 Prnt=01 Port=09 Cnt=01 Dev#=  3 Spd=1.5 MxCh= 0
    D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
    P:  Vendor=413c ProdID=2113 Rev=01.08
    S:  Product=Dell KB216 Wired Keyboard
    C:  #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=100mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
    I:  If#=0x1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid

    T:  Bus=01 Lev=01 Prnt=01 Port=06 Cnt=02 Dev#=  2 Spd=1.5 MxCh= 0
    D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
    P:  Vendor=046d ProdID=c077 Rev=72.00
    S:  Manufacturer=Logitech
    S:  Product=USB Optical Mouse
    C:  #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid

    T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=10000 MxCh= 4
    D:  Ver= 3.10 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
    P:  Vendor=1d6b ProdID=0003 Rev=06.06
    S:  Manufacturer=Linux 6.6.12.mx64.461 xhci-hcd
    S:  Product=xHCI Host Controller
    S:  SerialNumber=0000:01:00.0
    C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
    
    T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 4
    D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
    P:  Vendor=1d6b ProdID=0002 Rev=06.06
    S:  Manufacturer=Linux 6.6.12.mx64.461 xhci-hcd
    S:  Product=xHCI Host Controller
    S:  SerialNumber=0000:05:00.3
    C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

    T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=5000 MxCh= 4
    D:  Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
    P:  Vendor=1d6b ProdID=0003 Rev=06.06
    S:  Manufacturer=Linux 6.6.12.mx64.461 xhci-hcd
    S:  Product=xHCI Host Controller
    S:  SerialNumber=0000:05:00.3
    C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

Comment 1 Paul Menzel 2024-02-13 13:22:19 UTC

Created attachment 305862 [details]
Output of `acpidump` with system firmware 1.1.50

Comment 2 Artem S. Tashkinov 2024-02-13 17:46:26 UTC


*** This bug has been marked as a duplicate of bug 218490 ***

Comment 3 Paul Menzel 2024-02-26 14:05:46 UTC

Created attachment 305907 [details]
Linux 6.8-rc6+ messages with v2 patches (output of `dmesg`) with `usbcore.dyndbg=+p` and with system firmware 1.1.20

I tested this on a different system but the same model with a slightly older firmware version OptiPlex 5055 Ryzen CPU/0P03DX, BIOS 1.1.20 05/31/2019. The warning is gone.

The two patches were applied on top of tag *v6.8-rc6*.

1.  https://lore.kernel.org/all/20240220135946.4028553-1-mathias.nyman@linux.intel.com/
2.  https://lore.kernel.org/all/20240220135946.4028553-2-mathias.nyman@linux.intel.com/