Hi all, We found an issue that when system enters S3, it stays in S3 for a few seconds, and somehow it resumes automatically. And we try below quirk which can prevent it from waking up. drivers/usb/core/quirks.c @@ -208,11 +208,11 @@ static const struct usb_device_id usb_quirk_list[] = { USB_QUIRK_DISCONNECT_SUSPEND }, { USB_DEVICE(0x12d1, 0x15c3), .driver_info = USB_QUIRK_DISCONNECT_SUSPEND }, + { USB_DEVICE(0x8087, 0x0025), .driver_info = + USB_QUIRK_DISCONNECT_SUSPEND }, Here are some findings from the system. $ lsusb Bus 001 Device 004: ID 8087:0025 Intel Corp. $ lspci -nn 00:14.0 USB controller [0c03]: Intel Corporation Device [8086:a36d] (rev 01) Jan 4 04:20:37 u-OptiPlex-7060 kernel: [ 0.144060] v2 Added device:4b [\_SB_.PCI0.XHC_] parent PNP0A08:00 sta=0xf [ 0.171066] pci 0000:00:14.0: [8086:a36d] type 00 class 0x0c0330 [ 0.171099] pci 0000:00:14.0: reg 0x10: [mem 0x71420000-0x7142ffff 64bit] [ 0.171200] pci 0000:00:14.0: PME# supported from D3hot D3cold [ 3.680297] xhci_hcd 0000:00:14.0: xHCI Host Controller [ 3.680301] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1 [ 3.681509] xhci_hcd 0000:00:14.0: hcc params 0x20007fc1 hci version 0x110 quirks 0x00009810 [ 3.681515] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported [ 3.681621] usb usb1: SerialNumber: 0000:00:14.0 [ 3.681989] xhci_hcd 0000:00:14.0: xHCI Host Controller [ 3.681992] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2 [ 3.681993] xhci_hcd 0000:00:14.0: Host supports USB 3.1 Enhanced SuperSpeed [ 3.682026] usb usb2: SerialNumber: 0000:00:14.0 ===> Suspend [31.783177] PM: Syncing filesystems ... done. [31.784733] PM: Preparing system for sleep (mem) [31.785444] Freezing user space processes ... (elapsed 0.001 seconds) done. [31.786486] OOM killer disabled. [31.786487] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. [31.787597] PM: Suspending system (mem) [31.787631] Suspending console(s) (use no_console_suspend to debug) ===> Device resumes automatically [32.911466] wakeup_source_report_event: name:device:4b, event_count:1 [32.911467] wakeup_source_activate: name:device:4b, active_count:1 [32.911471] wakeup_source_report_event: name:0000:00:14.0, event_count:1 [32.911471] wakeup_source_activate: name:0000:00:14.0, active_count:1 [33.231056] PM: Finishing wakeup. Any ideas? Or anything we can try? Thanks. Best regards, AceLan Kao. -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html