Public bug reported:
At first usage of my dvb card this show in my dmesg : (it's correctly
work on jaunty)
[10593.069580] BUG: unable to handle kernel NULL pointer dereference at 00000008
[10593.069595] IP: [<c03a3e23>] _request_firmware+0x1f3/0x250
[10593.069612] *pde = 00000000
[10593.069619] Oops: 0000 [#1] SMP
[10593.069628] last sysfs file:
/sys/devices/virtual/net/pan0/statistics/collisions
[10593.069635] Modules linked in: binfmt_misc ppdev bridge stp bnep lp parport
snd_hda_codec_nvhdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec
snd_pcm_oss snd_mixer_oss snd_pcm arc4 snd_seq_dummy ecb snd_seq_oss
snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer iwlagn iwlcore
snd_seq_device mac80211 snd joydev tuner_xc2028 soundcore nvidia(P) cfg80211
snd_page_alloc uvcvideo videodev v4l1_compat jmb38x_ms memstick sdhci_pci sdhci
led_class dvb_usb_dib0700 dib7000p dib7000m dvb_usb dvb_core dib3000mc
dibx000_common dib0070 btusb psmouse serio_raw r8169 mii fbcon tileblit font
bitblit softcursor i915 drm i2c_algo_bit video output intel_agp agpgart
[10593.069764]
[10593.069772] Pid: 4882, comm: kdvb-ad-0-fe-0 Tainted: P
(2.6.31-10-generic #32-Ubuntu)
[10593.069780] EIP: 0060:[<c03a3e23>] EFLAGS: 00010202 CPU: 0
[10593.069787] EIP is at _request_firmware+0x1f3/0x250
[10593.069792] EAX: 00000000 EBX: f6595200 ECX: 00000001 EDX: c06feb34
[10593.069798] ESI: c070fbe0 EDI: eaff91c0 EBP: eaf01d30 ESP: eaf01cfc
[10593.069804] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[10593.069811] Process kdvb-ad-0-fe-0 (pid: 4882, ti=eaf00000 task=eac8b240
task.ti=eaf00000)
[10593.069816] Stack:
[10593.069819] 80000300 f6ba0c00 000000c0 03400000 00000006 eaf01d69 00000006
00000000
[10593.069835] <0> eaf01d94 f82e7062 f667ae80 00000000 00000000 eaf01d3c
c03a3f22 00000001
[10593.069852] <0> eaf01dcc f98db741 eaf01e78 f82e785b 00000002 00000002
f73ec6a8 f73ec000
[10593.069871] Call Trace:
[10593.069890] [<f82e7062>] ? dib0700_ctrl_wr+0x52/0x70 [dvb_usb_dib0700]
[10593.069899] [<c03a3f22>] ? request_firmware+0x12/0x20
[10593.069912] [<f98db741>] ? load_all_firmwares+0x61/0x6b0 [tuner_xc2028]
[10593.069925] [<f82e785b>] ? dib0700_i2c_xfer_legacy+0x17b/0x1a0
[dvb_usb_dib0700]
[10593.069939] [<f82e7062>] ? dib0700_ctrl_wr+0x52/0x70 [dvb_usb_dib0700]
[10593.069952] [<f82e785b>] ? dib0700_i2c_xfer_legacy+0x17b/0x1a0
[dvb_usb_dib0700]
[10593.069963] [<f98dc68b>] ? check_firmware+0x45b/0x870 [tuner_xc2028]
[10593.069975] [<c0136bdd>] ? update_curr+0x21d/0x230
[10593.069985] [<c0310494>] ? rb_erase+0xb4/0x120
[10593.069997] [<f98dcb05>] ? generic_set_freq+0x65/0x500 [tuner_xc2028]
[10593.070011] [<f82e789b>] ? dib0700_i2c_xfer+0x1b/0x30 [dvb_usb_dib0700]
[10593.070021] [<c0437744>] ? i2c_transfer+0x94/0xc0
[10593.070033] [<f82d0074>] ? dib7000p_write_word+0x54/0x70 [dib7000p]
[10593.070045] [<f98dd275>] ? xc2028_set_params+0x185/0x276 [tuner_xc2028]
[10593.070055] [<c0569825>] ? schedule_timeout+0x185/0x200
[10593.070067] [<f82d229b>] ? dib7000p_set_frontend+0x4b/0x170 [dib7000p]
[10593.070078] [<c014bb45>] ? try_to_del_timer_sync+0x45/0x50
[10593.070102] [<f8298a41>] ? dvb_frontend_swzigzag_autotune+0x111/0x260
[dvb_core]
[10593.070113] [<c0137a17>] ? try_to_wake_up+0xf7/0x350
[10593.070122] [<c056af53>] ? _spin_lock_irq+0x13/0x20
[10593.070146] [<f8299601>] ? dvb_frontend_swzigzag+0x1d1/0x260 [dvb_core]
[10593.070168] [<f829a007>] ? dvb_frontend_thread+0x387/0x630 [dvb_core]
[10593.070178] [<c0157930>] ? autoremove_wake_function+0x0/0x40
[10593.070200] [<f8299c80>] ? dvb_frontend_thread+0x0/0x630 [dvb_core]
[10593.070208] [<c015763c>] ? kthread+0x7c/0x90
[10593.070215] [<c01575c0>] ? kthread+0x0/0x90
[10593.070223] [<c0103f17>] ? kernel_thread_helper+0x7/0x10
[10593.070228] Code: 00 00 00 c7 44 24 04 d0 80 00 00 89 fa 89 34 24 ff 55 e0
83 45 e4 04 8b 45 e4 8b 00 85 c0 89 45 e0 75 d6 e9 52 fe ff ff 8b 45 e8 <8b> 70
08 e8 a5 69 ff ff 89 5c 24 0c 89 74 24 08 89 44 24 04 c7
[10593.070326] EIP: [<c03a3e23>] _request_firmware+0x1f3/0x250 SS:ESP
0068:eaf01cfc
[10593.070338] CR2: 0000000000000008
[10593.070346] ---[ end trace 90332185c87bab54 ]---
during boot I view this message
[ 6.010897] dvb-usb: found a 'YUAN High-Tech STK7700PH' in warm state.
[ 6.010925] dvb-usb: will pass the complete MPEG2 transport stream to the
software demuxer.
[ 7.095532] dvb-usb: schedule remote query interval to 50 msecs.
[ 7.095535] dvb-usb: YUAN High-Tech STK7700PH successfully initialized and
connected.
[ 7.095686] usbcore: registered new interface driver dvb_usb_dib0700
** Affects: ubuntu
Importance: Undecided
Status: New
--
DVB tuner (dib0700) not work on karmic
https://bugs.launchpad.net/bugs/429662
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