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Fab Stz fabstz-it at yahoo.frHello Le mercredi 2 octobre 2019 22:26:17 CEST, vous avez écrit : > This is weird, I haven't seen this issue before. Which USB host > controller are you using, which OS and which version of libusb? This is with debian buster (=stable) with libusb 1.0 : libusb-1.0-0:amd64 version 2:1.0.22-2 What do you mean by USB Host Controller ? I attached a few files When connected to rear USB 3.1gen1 : OK rear USB 3.1gen2 : KO front USB 2 : KO front USB 3.1gen1 : KO according to MB specs (asus PRIME b450M-a: rear USB3.1 gen1 is controlled by CPU : Athlon200GE the 3 other are controlled by chipset B450M > How often does this problem occur? Quite often. For ex when running welle.io 2.0 beta3 the ferquency gets set once and never changes again. A way to get around it, is to call cancel_async before setting the frenquency. But I have that error also without reading any data. with the sample test code attached. Regards -------------- next part -------------- [36076.696051] usb 1-8: new high-speed USB device number 7 using xhci_hcd [36076.875854] usb 1-8: New USB device found, idVendor=0bda, idProduct=2838, bcdDevice= 1.00 [36076.875858] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [36076.875860] usb 1-8: Product: RTL2838UHIDIR [36076.875861] usb 1-8: Manufacturer: Realtek [36076.875863] usb 1-8: SerialNumber: 00000001 [36076.893843] usb 1-8: dvb_usb_v2: found a 'Realtek RTL2832U reference design' in warm state [36077.003944] usb 1-8: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [36077.003954] dvbdev: DVB: registering new adapter (Realtek RTL2832U reference design) [36077.097576] i2c i2c-8: Added multiplexed i2c bus 9 [36077.097579] rtl2832 8-0010: Realtek RTL2832 successfully attached [36077.097592] usb 1-8: DVB: registering adapter 0 frontend 0 (Realtek RTL2832 (DVB-T))... [36077.097674] r820t 9-001a: creating new instance [36077.110893] r820t 9-001a: Rafael Micro r820t successfully identified [36077.113479] rtl2832_sdr rtl2832_sdr.0.auto: Registered as swradio0 [36077.113481] rtl2832_sdr rtl2832_sdr.0.auto: Realtek RTL2832 SDR attached [36077.113483] rtl2832_sdr rtl2832_sdr.0.auto: SDR API is still slightly experimental and functionality changes may follow [36077.137899] Registered IR keymap rc-empty [36077.137949] rc rc0: Realtek RTL2832U reference design as /devices/pci0000:00/0000:00:01.2/0000:01:00.0/usb1/1-8/rc/rc0 [36077.137995] input: Realtek RTL2832U reference design as /devices/pci0000:00/0000:00:01.2/0000:01:00.0/usb1/1-8/rc/rc0/input18 [36077.138108] rc rc0: lirc_dev: driver dvb_usb_rtl28xxu registered at minor = 0, raw IR receiver, no transmitter [36077.138172] usb 1-8: dvb_usb_v2: schedule remote query interval to 200 msecs [36077.157882] usb 1-8: dvb_usb_v2: 'Realtek RTL2832U reference design' successfully initialized and connected -------------- next part -------------- Bus 001 Device 007: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0bda Realtek Semiconductor Corp. idProduct 0x2838 RTL2838 DVB-T bcdDevice 1.00 iManufacturer 1 Realtek iProduct 2 RTL2838UHIDIR iSerial 3 00000001 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0022 bNumInterfaces 2 bConfigurationValue 1 iConfiguration 4 USB2.0-Bulk&Iso bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 5 Bulk-In, Interface Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 5 Bulk-In, Interface Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 2 Device Status: 0x0000 (Bus Powered) can't get debug descriptor: Resource temporarily unavailable -------------- next part -------------- /: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 10000M /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 480M |__ Port 8: Dev 7, If 0, Class=Vendor Specific Class, Driver=dvb_usb_rtl28xxu, 480M |__ Port 8: Dev 7, If 1, Class=Vendor Specific Class, Driver=, 480M -------------- next part -------------- A non-text attachment was scrubbed... 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