>> INFO: task khubd:1100 blocked for more than 120 seconds. >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> khubd D 0000000000000000 0 1100 2 0x00000000 >> ffff8801a694e930 0000000000000046 ffff8801a691ffd8 ffffffff8162b020 >> 0000000000010280 ffff8801a691ffd8 0000000000004000 0000000000010280 >> ffff8801a691ffd8 ffff8801a694e930 0000000000010280 ffff8801a691e000 >> Call Trace: >> [<ffffffff8128580e>] ? apic_timer_interrupt+0xe/0x20 >> [<ffffffff8113ffff>] ? memscan+0x3/0x18 >> [<ffffffff8128354e>] ? __mutex_lock_slowpath+0x15c/0x295 >> [<ffffffff81283690>] ? mutex_lock+0x9/0x18 >> [<ffffffffa06af671>] ? dvb_init+0x99/0xcc8 [em28xx_dvb] >> [<ffffffffa067d459>] ? em28xx_init_extension+0x35/0x53 [em28xx] >> [<ffffffffa067b938>] ? em28xx_usb_probe+0x827/0x8df [em28xx] > > I think it crashes before it even goes to PCTV 290e specific part. I > suspect it is bug somewhere in em28xx driver. The scenario that triggers this crash is: a) Plug the 290e in, and allow it to initialise correctly b) Use xine to watch any DVB-T channel successfully c) Try switching to previously-tuned DVB-T2 channel; this makes xine hang. d) Kill xine e) Physically replug adapter em28xx re-initialisation will now fail: ... tda18271: performing RF tracking filter calibration tda18271: RF tracking filter calibration complete usb 4-1: USB disconnect, device number 3 em28xx #0: disconnecting em28xx #0 video em28xx #0: V4L2 device video1 deregistered tda18271 7-0060: destroying instance usb 4-1: new high speed USB device number 4 using ehci_hcd em28xx: New device PCTV Systems PCTV 290e @ 480 Mbps (2013:024f, interface 0, class 0) em28xx #0: chip ID is em28174 em28xx #0: Identified as PCTV nanoStick T2 290e (card=78) Registered IR keymap rc-pinnacle-pctv-hd input: em28xx IR (em28xx #0) as /devices/pci0000:00/0000:00:1d.7/usb4/4-1/rc/rc1/input8 rc1: em28xx IR (em28xx #0) as /devices/pci0000:00/0000:00:1d.7/usb4/4-1/rc/rc1 em28xx #0: v4l2 driver version 0.1.2 em28xx #0: V4L2 video device registered as video1 INFO: task khubd:1217 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. khubd D 0000000000000000 0 1217 2 0x00000000 ffff8801a7081ef0 0000000000000046 ffff8801a69a9fd8 ffffffff8162b020 0000000000010280 ffff8801a69a9fd8 0000000000004000 0000000000010280 ffff8801a69a9fd8 ffff8801a7081ef0 0000000000010280 ffff8801a69a8000 Call Trace: [<ffffffff8128580e>] ? apic_timer_interrupt+0xe/0x20 [<ffffffff8113ffff>] ? memscan+0x3/0x18 [<ffffffff8128354e>] ? __mutex_lock_slowpath+0x15c/0x295 [<ffffffff81283690>] ? mutex_lock+0x9/0x18 [<ffffffffa0694671>] ? dvb_init+0x99/0xcc8 [em28xx_dvb] [<ffffffffa0662459>] ? em28xx_init_extension+0x35/0x53 [em28xx] [<ffffffffa0660938>] ? em28xx_usb_probe+0x827/0x8df [em28xx] Cheers, Chris -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
