I have a Lenovo X220, and d3cold seems to break hotplug on xhci. This is 3.6.2-4.fc17.x86_64. The device is: 0e:00.0 USB Controller [0c03]: NEC Corporation uPD720200 USB 3.0 Host Controller [1033:0194] (rev 04) (prog-if 30 [XHCI]) Subsystem: Lenovo Device [17aa:21da] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 18 Region 0: Memory at f0c00000 (64-bit, non-prefetchable) [size=8K] Capabilities: [50] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [90] MSI-X: Enable+ Count=8 Masked- Vector table: BAR=0 offset=00001000 PBA: BAR=0 offset=00001080 Capabilities: [a0] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 unlimited ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt- LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Not Supported, TimeoutDis+ DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- Capabilities: [100 v1] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn- Capabilities: [140 v1] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff Capabilities: [150 v1] Latency Tolerance Reporting Max snoop latency: 0ns Max no snoop latency: 0ns Kernel driver in use: xhci_hcd (read while the port was functioning and in use.) Inserting a USB3 flash stick has absolutely no effect, other than some lights on the stick flickering for a couple seconds. When I wrote 0 to /sys/devices/pci0000:00/0000:00:1c.6/0000:0e:00.0/d3cold_allowed with the stick inserted, the kernel immediately detected it, and it worked. dmesg said: [13829.364050] hub 3-0:1.0: unable to enumerate USB device on port 1 [13829.570044] usb 4-1: new SuperSpeed USB device number 2 using xhci_hcd [13829.582636] usb 4-1: Parent hub missing LPM exit latency info. Power management will be impacted. [13829.585194] usb 4-1: New USB device found, idVendor=1b1c, idProduct=1a01 [13829.585203] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [13829.585208] usb 4-1: Product: Voyager GT 3.0 [13829.585213] usb 4-1: Manufacturer: Corsair [13829.585216] usb 4-1: SerialNumber: 1111800000000051 [13829.586555] scsi13 : usb-storage 4-1:1.0 [13830.588360] scsi 13:0:0:0: Direct-Access Corsair Voyager GT 3.0 1.00 PQ: 0 ANSI: 5 [13830.590394] sd 13:0:0:0: [sdb] 31260672 512-byte logical blocks: (16.0 GB/14.9 GiB) [13830.590403] sd 13:0:0:0: Attached scsi generic sg1 type 0 [13830.590574] sd 13:0:0:0: [sdb] Write Protect is off [13830.590584] sd 13:0:0:0: [sdb] Mode Sense: 23 00 00 00 [13830.590755] sd 13:0:0:0: [sdb] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA [13830.595257] sdb: unknown partition table [13830.596046] sd 13:0:0:0: [sdb] Attached SCSI removable disk [13952.583378] ehci_hcd 0000:00:1d.0: power state changed by ACPI to D0 [13952.684487] ehci_hcd 0000:00:1d.0: setting latency timer to 64 [13952.685039] ehci_hcd 0000:00:1a.0: power state changed by ACPI to D0 [13952.695332] ehci_hcd 0000:00:1d.0: power state changed by ACPI to D3cold [13952.785385] ehci_hcd 0000:00:1a.0: setting latency timer to 64 [13952.802164] ehci_hcd 0000:00:1a.0: power state changed by ACPI to D3cold [13963.727363] ehci_hcd 0000:00:1d.0: power state changed by ACPI to D0 [13963.828153] ehci_hcd 0000:00:1d.0: setting latency timer to 64 [13963.828533] ehci_hcd 0000:00:1a.0: power state changed by ACPI to D0 I suspect the ehci_hcd noise is something else. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
