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Critical: [(null)] evdevmouse: could not read from input device (no such device)



  • Hi,

    My application suddenly somehow in random occassion print Critical: [(null)] evdevmouse: could not read from input device (no such device) and resistive touch screen that behave as mouse in /dev/input/event0 couldn't work anymore unless i restart the application.

    I have 3 questions :

    • Why QT can't reload the input?
    • How QT and evdev works? Based on what i know, QT only receive whatever evdev give, so it's not QT problem, but why if i restart the application it work again?
    • Is there some way i can get the signal so the application able to restart it self?

    Please kindly advise. thank you!


  • Lifetime Qt Champion

    Hi,

    Did you check the kernel messages to see why the device disappear ?



  • Hi,

    [167139.543452] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [167139.543552] usb 1-1.2: Product: LG TS2009F-USB
    [167139.543561] usb 1-1.2: Manufacturer: Edamak
    [167139.550276] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.0056/input/input85
    [167139.551077] hid-generic 0003:16FD:D091.0056: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [167779.752593] usb 1-1.2: USB disconnect, device number 89
    [167780.222048] usb 1-1.2: new full-speed USB device number 90 using dwc_otg
    [167780.361938] usb 1-1.2: New USB device found, idVendor=16fd, idProduct=d091, bcdDevice= 4.04
    [167780.361954] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [167780.362039] usb 1-1.2: Product: LG TS2009F-USB
    [167780.362048] usb 1-1.2: Manufacturer: Edamak
    [167780.368588] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.0057/input/input86
    [167780.369349] hid-generic 0003:16FD:D091.0057: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [167949.480568] usb 1-1.2: USB disconnect, device number 90
    [167950.005785] usb 1-1.2: new full-speed USB device number 91 using dwc_otg
    [167950.145691] usb 1-1.2: New USB device found, idVendor=16fd, idProduct=d091, bcdDevice= 4.04
    [167950.145755] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [167950.145765] usb 1-1.2: Product: LG TS2009F-USB
    [167950.145774] usb 1-1.2: Manufacturer: Edamak
    [167950.150931] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.0058/input/input87
    [167950.151647] hid-generic 0003:16FD:D091.0058: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [168592.552690] usb 1-1.2: USB disconnect, device number 91
    [168592.990538] usb 1-1.2: new full-speed USB device number 92 using dwc_otg
    [168593.130510] usb 1-1.2: New USB device found, idVendor=16fd, idProduct=d091, bcdDevice= 4.04
    [168593.130524] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [168593.130534] usb 1-1.2: Product: LG TS2009F-USB
    [168593.130543] usb 1-1.2: Manufacturer: Edamak
    [168593.136974] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.0059/input/input88
    [168593.137714] hid-generic 0003:16FD:D091.0059: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [168789.160592] usb 1-1.2: USB disconnect, device number 92
    [168789.633985] usb 1-1.2: new full-speed USB device number 93 using dwc_otg
    [168789.772695] usb 1-1.2: New USB device found, idVendor=16fd, idProduct=d091, bcdDevice= 4.04
    [168789.772712] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [168789.772722] usb 1-1.2: Product: LG TS2009F-USB
    [168789.772731] usb 1-1.2: Manufacturer: Edamak
    [168789.778173] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.005A/input/input89
    [168789.778931] hid-generic 0003:16FD:D091.005A: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [169470.120568] usb 1-1.2: USB disconnect, device number 93
    [169470.544676] usb 1-1.2: new full-speed USB device number 94 using dwc_otg
    [169470.684565] usb 1-1.2: New USB device found, idVendor=16fd, idProduct=d091, bcdDevice= 4.04
    [169470.684580] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [169470.684675] usb 1-1.2: Product: LG TS2009F-USB
    [169470.684685] usb 1-1.2: Manufacturer: Edamak
    [169470.691307] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.005B/input/input90
    [169470.692048] hid-generic 0003:16FD:D091.005B: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [170297.976148] usb 1-1.2: reset full-speed USB device number 94 using dwc_otg
    [170471.875602] usb 1-1.2: reset full-speed USB device number 94 using dwc_otg
    [171142.628230] usb 1-1.2: reset full-speed USB device number 94 using dwc_otg
    [171334.568600] usb 1-1.2: USB disconnect, device number 94
    [171335.119664] usb 1-1.2: new full-speed USB device number 95 using dwc_otg
    [171335.259575] usb 1-1.2: New USB device found, idVendor=16fd, idProduct=d091, bcdDevice= 4.04
    [171335.259645] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [171335.259655] usb 1-1.2: Product: LG TS2009F-USB
    [171335.259665] usb 1-1.2: Manufacturer: Edamak
    [171335.267232] input: Edamak LG TS2009F-USB as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:16FD:D091.005C/input/input91
    [171335.267982] hid-generic 0003:16FD:D091.005C: input,hidraw0: USB HID v1.11 Mouse [Edamak LG TS2009F-USB] on usb-3f980000.usb-1.2/input0
    [172217.529649] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [172910.829316] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [173080.891400] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [173750.519339] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [173942.721566] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [175531.215080] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [175702.796790] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [176562.443670] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [177250.205941] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [178343.752958] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [178911.073268] usb 1-1.3: reset high-speed USB device number 5 using dwc_otg
    [178994.530648] Modules linked in: tun xt_conntrack ipt_MASQUERADE nf_conntrack_netlink nft_counter xt_addrtype nft_compat nft_chain_nat_ipv4 nf_nat_ipv4 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink br_netfilter bridge overlay bnep hci_uart btbcm serdev bluetooth ecdh_generic 8021q garp stp llc brcmfmac brcmutil joydev snd_usb_audio snd_hwdep sha256_generic uvcvideo snd_usbmidi_lib snd_rawmidi snd_seq_device cfg80211 rfkill snd_bcm2835(C) raspberrypi_hwmon hwmon snd_pcm snd_timer snd bcm2835_codec(C) bcm2835_v4l2(C) v4l2_mem2mem i2c_bcm2835 bcm2835_mmal_vchiq(C) videobuf2_dma_contig v4l2_common videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common vc_sm_cma(C) videodev media evdev uio_pdrv_genirq uio fixed i2c_dev ip_tables x_tables ipv6
    [179219.388016] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    [179901.528151] usb 1-1.2: reset full-speed USB device number 95 using dwc_otg
    

    There's no why the device disconnected. Is there any way QT able to get the signal or re read from /dev/input/event0 again?

    Thanks!


  • Lifetime Qt Champion

    Looks like there's a bug somewhere in the lower levels of your system.

    Do you get the same result if you plug your mouse in another port ?
    Do you get the same result if you plug a different mouse in the same port ?

    You likely don't have that file available anymore when the device restarts, do you ?


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