Hello, With provided kernel image from Debian I had these two issues: sysfs: cannot create duplicate filename '/class/dvb/dvb0.ca0 'sysfs group 'power' not found for kobject 'dvb0.ca0' = It seems that this was fixed by upstream driver. Now I have this issue: My tuner itself is disconnecting and connecting back in this case tvheadend doesn't seen it and I need to restart tvheadend. I also noticed in dmesg that I have two different bug traces 1) 779.987906] ------------[ cut here ]------------ [ 2779.987916] WARNING: CPU: 0 PID: 2372 at /home/zumbi/linux-4.9.2/kernel/module.c:1108 module_put+0x8e/0xa0 [ 2779.987917] Modules linked in: binfmt_misc cpufreq_conservative cpufreq_powersave cpufreq_userspace cfg80211 bonding mt2063(OE) drxk(OE) rc_tt_1500(OE) tda10048(OE) tda827x(OE) tda10023(OE) dvb_usb_az6007(OE) cypress_firmware(OE) dvb_usb_ttusb2(OE) dvb_usb_v2(OE) dvb_usb(OE) dvb_core(OE) rc_core(OE) media(OE) snd_hda_codec_hdmi nls_ascii nls_cp437 vfat fat snd_hda_codec_realtek snd_hda_codec_generic zfs(POE) zunicode(POE) zavl(POE) zcommon(POE) znvpair(POE) intel_rapl intel_soc_dts_iosf intel_powerclamp spl(OE) coretemp iTCO_wdt iTCO_vendor_support kvm_intel ppdev kvm irqbypass crct10dif_pclmul crc32_pclmul i915 efi_pstore ghash_clmulni_intel cryptd intel_cstate serio_raw snd_intel_sst_acpi pcspkr efivars snd_soc_rt5645 snd_intel_sst_core snd_hda_intel i2c_i801 drm_kms_helper snd_soc_sst_mfld_platform [ 2779.987964] i2c_smbus snd_soc_rt5640 lpc_ich snd_soc_sst_match snd_soc_rl6231 snd_hda_codec mfd_core drm snd_soc_core evdev snd_hda_core hci_uart snd_hwdep snd_compress btbcm btqca i2c_algo_bit parport_pc snd_pcm shpchp battery parport btintel snd_timer bluetooth snd video soundcore dw_dmac dw_dmac_core rfkill i2c_designware_platform tpm_tis i2c_designware_core tpm_tis_core tpm button fuse autofs4 ext4 crc16 jbd2 fscrypto mbcache btrfs xor raid6_pq dm_mod md_mod sg uas usb_storage hid_generic usbhid sd_mod xhci_pci xhci_hcd ahci libahci e1000e usbcore libata ptp crc32c_intel pps_core usb_common scsi_mod psmouse thermal r8169 mii fan fjes sdhci_acpi i2c_hid sdhci hid mmc_core [ 2779.988022] CPU: 0 PID: 2372 Comm: tvheadend Tainted: P OE 4.9.0-0.bpo.1-amd64 #1 Debian 4.9.2-2~bpo8+1 [ 2779.988023] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Q1900-ITX, BIOS P1.80 11/08/2016 [ 2779.988027] 0000000000000000 ffffffff8972a1f5 0000000000000000 0000000000000000 [ 2779.988031] ffffffff89477884 ffff9f12b2dbaf00 ffff9f126a17c100 ffff9f12b535e648 [ 2779.988034] ffff9f12b656d960 ffff9f12b48fee40 ffff9f12b535e648 ffffffff894fe3be [ 2779.988038] Call Trace: [ 2779.988044] [<ffffffff8972a1f5>] ? dump_stack+0x5c/0x77 [ 2779.988048] [<ffffffff89477884>] ? __warn+0xc4/0xe0 [ 2779.988051] [<ffffffff894fe3be>] ? module_put+0x8e/0xa0 [ 2779.988060] [<ffffffffc0dccb0c>] ? dvb_ca_en50221_io_release+0x4c/0x90 [dvb_core] [ 2779.988064] [<ffffffff89605b0d>] ? __fput+0xcd/0x1e0 [ 2779.988067] [<ffffffff89495bc2>] ? task_work_run+0x72/0x90 [ 2779.988070] [<ffffffff8947be55>] ? do_exit+0x395/0xb50 [ 2779.988072] [<ffffffff8947c689>] ? do_group_exit+0x39/0xb0 [ 2779.988075] [<ffffffff8947c710>] ? SyS_exit_group+0x10/0x10 [ 2779.988079] [<ffffffff899fa1bb>] ? system_call_fast_compare_end+0xc/0x9b [ 2779.988081] ---[ end trace c675cdf08c26442d ]--- 2) [ 1209.584994] INFO: task kworker/0:0:4 blocked for more than 120 seconds. [ 1209.585005] Tainted: P OE 4.9.0-0.bpo.1-amd64 #1 [ 1209.585009] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1209.585013] kworker/0:0 D 0 4 2 0x00000000 [ 1209.585047] Workqueue: usb_hub_wq hub_event [usbcore] [ 1209.585052] ffff9f12a5070800 ffff9f12b1c19800 ffff9f12b1f88f40 ffff9f12b6628080 [ 1209.585059] ffff9f12bfc187c0 ffffb7e840c7bb58 ffffffff899f536d 0000000000000286 [ 1209.585065] 000000007977594d 00000000b1e76938 ffffb7e840c7bb78 ffff9f12b6628080 [ 1209.585072] Call Trace: [ 1209.585082] [<ffffffff899f536d>] ? __schedule+0x23d/0x6d0 [ 1209.585087] [<ffffffff899f5832>] ? schedule+0x32/0x80 [ 1209.585102] [<ffffffffc0dc697d>] ? dvb_dmxdev_release+0x4d/0x120 [dvb_core] [ 1209.585108] [<ffffffff894bb7d0>] ? wake_up_atomic_t+0x30/0x30 [ 1209.585116] [<ffffffffc0d79b34>] ? dvb_usb_adapter_dvb_exit+0x44/0x90 [dvb_usb] [ 1209.585121] [<ffffffffc0d78499>] ? dvb_usb_exit+0x49/0xe0 [dvb_usb] [ 1209.585127] [<ffffffffc0d7856b>] ? dvb_usb_device_exit+0x3b/0x50 [dvb_usb] [ 1209.585150] [<ffffffffc05726d1>] ? usb_unbind_interface+0x71/0x270 [usbcore] [ 1209.585156] [<ffffffff8986e285>] ? __device_release_driver+0x95/0x140 [ 1209.585160] [<ffffffff8986e34e>] ? device_release_driver+0x1e/0x30 [ 1209.585165] [<ffffffff8986cfc5>] ? bus_remove_device+0xf5/0x170 [ 1209.585169] [<ffffffff898694a7>] ? device_del+0x127/0x260 [ 1209.585192] [<ffffffffc057702b>] ? usb_remove_ep_devs+0x1b/0x30 [usbcore] [ 1209.585215] [<ffffffffc05700a3>] ? usb_disable_device+0x93/0x260 [usbcore] [ 1209.585237] [<ffffffffc0565d9a>] ? usb_disconnect+0x8a/0x260 [usbcore] [ 1209.585259] [<ffffffffc0567f90>] ? hub_event+0x7d0/0x1530 [usbcore] [ 1209.585264] [<ffffffff8949172b>] ? process_one_work+0x14b/0x410 [ 1209.585269] [<ffffffff894921e5>] ? worker_thread+0x65/0x4a0 [ 1209.585273] [<ffffffff89492180>] ? rescuer_thread+0x340/0x340 [ 1209.585277] [<ffffffff894974e0>] ? kthread+0xe0/0x100 [ 1209.585282] [<ffffffff8942476b>] ? __switch_to+0x2bb/0x700 [ 1209.585286] [<ffffffff89497400>] ? kthread_park+0x60/0x60 [ 1209.585291] [<ffffffff899fa435>] ? ret_from_fork+0x25/0x30 Full log: pastebin.com/VWDQE8DC I also noticed these messages in log, but I think there're just flooding system and syslog, which has 3GB after 2-3 minutes. All cores because of this are at 100%. This happens when I unplug usb and plug it back (but I didnt unplug it) log: pastebin.com/52Fgdf6b [ 4285.212518] usb read operation failed. (-71) [ 4285.212522] usb in operation failed. (-5) [ 4285.212775] usb read operation failed. (-71) [ 4285.212778] usb in operation failed. (-5) [ 4285.212930] usb read operation failed. (-71) [ 4285.212932] usb in operation failed. (-5) [ 4285.213024] usb read operation failed. (-71) [ 4285.213026] usb in operation failed. (-5) [ 4285.213205] usb read operation failed. (-71) [ 4285.213208] usb in operation failed. (-5) [ 4285.213375] usb read operation failed. (-71) [ 4285.213377] usb in operation failed. (-5) [ 4285.213505] usb read operation failed. (-71) [ 4285.213507] usb in operation failed. (-5) [ 4285.213637] usb read operation failed. (-71) [ 4285.213639] usb in operation failed. (-5) This flood exactly same I'm having on - Odroid C2 (Linux odroid64 3.14.79-92 #1 SMP PREEMPT Mon Oct 31 19:37:22 BRST 2016 aarch64 aarch64 aarch64 GNU/Linux) - Turris 1.1 (Linux turris 3.18.48-d530b2d348ac893d980001e28f6e5eb3-2 #1 SMP Sat Feb 18 01:13:49 CET 2017 ppc n) Except this flood it works on both devices, but there it won't disconnect itself. I tried lsusb -t after that and it didnt work. Only power shutdown of that unit helped. When you will need more informations/details, please write my I will try to do my best. I'm newbie to reporting bugs to upstream. Also take my apologize that I'm writing it here (even I created issue on bugtracker - bugzilla.kernel.org/show_bug.cgi?id=194783 after I mention I created issue) on IRC then Marcus told me that it's better to send email. // I think better would be split my issue with another tuner (TechniSat Digital GmbH CableStar Combo HD CI), but I tried with with mainline z6007 and drxk and sometimes I get flood, too. pastebin.com/6amB39TK , pastebin.com/RMF67uez For me it's interesting to see that I didnt have drxk issue (I didn't notice that), but when I have connected both tuners to one machines. I splitted them to different machines I see it now. Looking forward to hearing from you, Josef Schlehofer
