[mythtv-users] mythbackend makes kernel throwing a wobbly

Sat Mar 24 10:27:54 UTC 2007

Ben Lancaster skrev:
> Hi all,
>
> My Mythbox has just started doing this:
>
> -- snip from /var/log/messages --
> Mar 24 00:56:13 benlancaster kernel: Unable to handle kernel paging  
> request at ffff8100010fd4c0 RIP:
> Mar 24 00:56:13 benlancaster kernel:  [<ffff8100010fd4c0>]
> Mar 24 00:56:13 benlancaster kernel: PGD 8063 PUD 9063 PMD  
> 80000000010001e3 PTE 0
> Mar 24 00:56:13 benlancaster kernel: Oops: 0011 [3] SMP
> Mar 24 00:56:13 benlancaster kernel: last sysfs file: /block/sda/ 
> removable
> Mar 24 00:56:13 benlancaster kernel: CPU 1
> Mar 24 00:56:13 benlancaster kernel: Modules linked in: appletalk  
> nfsd exportfs lockd nfs_acl autofs4 sunrpc xfs dm_mirror dm_mod video  
> sbs i2c_ec dock button battery asus_acpi backlight ac ipv6 lp  
> parport_pc parport lirc_mceusb2(F)(U) lirc_imon(F)(U) lirc_dev(F)(U)  
> mt2060(F)(U) dvb_usb_dib0700(F)(U) dib7000m(F)(U) dib7000p(F)(U)  
> dvb_usb(F)(U) dvb_core(F)(U) dvb_pll(F)(U) dib3000mc(F)(U)  
> dibx000_common(F)(U) snd_via82xx(F)(U) sg ehci_hcd gameport  
> snd_ac97_codec(F)(U) ac97_bus(F)(U) snd_seq_dummy(F)(U) uhci_hcd  
> snd_seq_oss(F)(U) snd_seq_midi_event(F)(U) nvidia(PF)(U) snd_seq(F) 
> (U) snd_pcm_oss(F)(U) snd_mixer_oss(F)(U) snd_pcm(F)(U) snd_timer(F) 
> (U) snd_page_alloc(F)(U) snd_mpu401_uart(F)(U) snd_rawmidi(F)(U)  
> snd_seq_device(F)(U) 8139too i2c_viapro i2c_core 8139cp snd(F)(U) mii  
> soundcore ide_cd cdrom pcspkr shpchp ext3 jbd sata_via libata sd_mod  
> scsi_mod
> Mar 24 00:56:13 benlancaster kernel: Pid: 2773, comm: mythbackend  
> Tainted: PF     2.6.20-1.2300.fc5 #1
> Mar 24 00:56:13 benlancaster kernel: RIP: 0010:[<ffff8100010fd4c0>]   
> [<ffff8100010fd4c0>]
> Mar 24 00:56:13 benlancaster kernel: RSP: 0018:ffff810028cd5d00   
> EFLAGS: 00010286
> Mar 24 00:56:13 benlancaster kernel: RAX: ffff8100010fd4c0 RBX:  
> ffff810037cf9a80 RCX: 0000000000000195
> Mar 24 00:56:13 benlancaster kernel: RDX: 0000000000000018 RSI:  
> ffff81003fa0a680 RDI: ffff810037cf9a80
> Mar 24 00:56:13 benlancaster kernel: RBP: ffff81003fa0a680 R08:  
> 0000000000000018 R09: 0000000000000008
> Mar 24 00:56:13 benlancaster kernel: R10: 0000000000000000 R11:  
> ffffffff804051ba R12: 00000000000000d0
> Mar 24 00:56:13 benlancaster kernel: R13: ffff81003fa0a690 R14:  
> 0000000000000000 R15: 0000000000000000
> Mar 24 00:56:13 benlancaster kernel: FS:  0000000000000000(0000)  
> GS:ffff81003feb1b40(0000) knlGS:0000000000000000
> Mar 24 00:56:13 benlancaster kernel: CS:  0010 DS: 0000 ES: 0000 CR0:  
> 000000008005003b
> Mar 24 00:56:13 benlancaster kernel: CR2: ffff8100010fd4c0 CR3:  
> 000000002042b000 CR4: 00000000000006e0
> Mar 24 00:56:13 benlancaster kernel: Process mythbackend (pid: 2773,  
> threadinfo ffff810028cd4000, task ffff810026e94040)
> Mar 24 00:56:13 benlancaster kernel: Stack:  ffffffff80223b10  
> ffff81003fa0a680 000000000000023f 00000000000000d0
> Mar 24 00:56:13 benlancaster kernel:  ffffffff802378f7  
> ffff81003d22c480 ffff810026e94688 ffff81003fa0a680
> Mar 24 00:56:13 benlancaster kernel:  ffff810026e94040  
> 0000000000000001 000000000000000f ffff810028cd5ef8
> Mar 24 00:56:13 benlancaster kernel: Call Trace:
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff80223b10>] filp_close 
> +0x37/0x65
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff802378f7>]  
> put_files_struct+0x66/0xbf
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff80215203>] do_exit 
> +0x29a/0x86f
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff802468b8>] cpuset_exit 
> +0x0/0x6b
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff8022abff>]  
> get_signal_to_deliver+0x437/0x466
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff80257b03>]  
> do_notify_resume+0x9c/0x71c
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff80285931>]  
> default_wake_function+0x0/0xe
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff8029c21b>] sys_futex 
> +0x103/0x121
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff8025a1a7>]  
> sysret_signal+0x1c/0x27
> Mar 24 00:56:13 benlancaster kernel:  [<ffffffff8025a437>]  
> ptregscall_common+0x67/0xb0
> Mar 24 00:56:13 benlancaster kernel:
> Mar 24 00:56:13 benlancaster kernel:
> Mar 24 00:56:13 benlancaster kernel: Code: 00 00 00 00 00 08 00 00 01  
> 00 00 00 ff ff ff ff 00 00 00 00
> Mar 24 00:56:13 benlancaster kernel: RIP  [<ffff8100010fd4c0>]
> Mar 24 00:56:13 benlancaster kernel:  RSP <ffff810028cd5d00>
> Mar 24 00:56:13 benlancaster kernel: CR2: ffff8100010fd4c0
> Mar 24 00:56:13 benlancaster kernel:  <1>Fixing recursive fault but  
> reboot is needed!
>
> Here's what mythbackend is saying round the same time:
>
> 2007-03-24 00:53:43.278 TVRec(2): HW Tuner: 2->2
> 2007-03-24 00:54:20.896 EITScanner: Added 1106 EIT Events
> 2007-03-24 00:54:20.900 Reschedule requested for id -1.
> 2007-03-24 00:54:20.911 DVBChan(1) Error: Tune(): Setting Frontend  
> tuning parameters failed.
>                          eno: Inappropriate ioctl for device (25)
> 2007-03-24 00:54:20.915 DVBChan(1) Error: SetChannelByString(728):  
> Tuning to frequency.
> 2007-03-24 00:54:20.916 TVRec(1) Error: Failed to set channel to 728.  
> Reverting to kState_None
> 2007-03-24 00:54:20.917 EITScanner: Now looking for EIT data on  
> multiplex of channel 728
> 2007-03-24 00:54:21.010 Scheduled 27 items in 0.1 = 0.07 match + 0.04  
> place
> 2007-03-24 00:54:37.245 EITScanner: Added 843 EIT Events
> 2007-03-24 00:55:47.199 MainServer::HandleAnnounce Monitor
> 2007-03-24 00:55:47.206 adding: xxx as a client (events: 0)
> 2007-03-24 00:55:47.207 MainServer::HandleAnnounce Monitor
> 2007-03-24 00:55:47.208 adding: xxx as a client (events: 1)
> 2007-03-24 00:55:54.213 MainServer::HandleAnnounce Monitor
> 2007-03-24 00:55:54.216 adding: xxx as a client (events: 0)
>
> I have no idea what it means or how to debug it, can anybody point me  
> in the right direction?
>
> My Kernel is 2.6.20-1.2300.fc5 #1 SMP Sun Mar 11 19:29:01 EDT 2007  
> x86_64 x86_64 x86_64 GNU/Linux - I'm running latest MythTV RPMs from  
> ATRPMS, on an Intel P4 with Nova-T 500
>
> Thanks,
>
> Ben
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>   
You have hit a kernel bug in usb core. It was solved in 2.6.20.1 (or 
.2). Fedora hasn't incl. patch for it yet. You can easily solve it by 
recompile with latest stable kernel. If you don't like that solution, 
turn off EIT data gathering in Myth since this seems to adress this bug 
more frequently with Nova-T 500.

/Micke