I recently upgraded to Ubuntu 15.04 to get a 3.19 kernel because the
Linux TV Wiki suggests that, from kernel version 3.18 onwards, my
"Mystique SaTiX-S2 Sky V2 USB (DVBSKY S960 clone)" would work 'out of
the box'.
I followed the MythTV instructions by installing dvb-apps and mplayer.
Unfortunately, the next step - attempting to scan for channels - fails:
root# scan -x0 /usr/share/dvb/dvb-s/Astra-28.2E
scanning /usr/share/dvb/dvb-s/Astra-28.2E
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
main:2745: FATAL: failed to open '/dev/dvb/adapter0/frontend0': 2 No
such file or directory
When I look in /dev/dvb/adapter0, I don't have a frontend0 device:
root# ls -l /dev/dvb/adapter0
total 0
crw-rw----+ 1 root video 212, 0 Apr 24 13:57 demux0
crw-rw----+ 1 root video 212, 1 Apr 24 13:57 dvr0
crw-rw----+ 1 root video 212, 2 Apr 24 13:57 net0
Looking at the output from dmesg, I find evidence for a likely cause...
[ 15.316027] usb 2-3: dvb_usb_v2: found a 'DVBSky S960/S860' in warm
state
[ 15.316147] usb 2-3: dvb_usb_v2: will pass the complete MPEG2
transport stream to the software demuxer
[ 15.316164] DVB: registering new adapter (DVBSky S960/S860)
[ 15.317421] usb 2-3: dvb_usb_v2: MAC address: 00:17:42:54:96:0c
[ 15.627310] i2c i2c-7: m88ds3103_attach: chip_id=70
[ 15.631284] i2c i2c-7: Added multiplexed i2c bus 8
[ 15.745707] BUG: unable to handle kernel NULL pointer dereference
at 0000000000000040
[ 15.745748] IP: [<ffffffff8126e6be>] sysfs_remove_link+0xe/0x30
[ 15.745774] PGD 0
[ 15.745785] Oops: 0000 [#1] SMP
[ 15.745804] Modules linked in: m88ts2022 m88ds3103 i2c_mux
dvb_usb_dvbsky(+) dvb_usb_v2 dvb_core rc_core snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_intel snd_usb_audio snd_hda_controller
gpio_ich hp_wmi sparse_keymap snd_hda_codec snd_usbmidi_lib snd_hwdep
snd_pcm i915 snd_seq_midi snd_seq_midi_event coretemp snd_rawmidi
snd_seq joydev snd_seq_device drm_kms_helper drm snd_timer kvm mei_me
snd mei serio_raw lpc_ich shpchp soundcore 8250_fintek video wmi
i2c_algo_bit tpm_infineon mac_hid parport_pc ppdev lp parport autofs4
hid_generic usbhid hid uas usb_storage psmouse ahci libahci e1000e ptp
pps_core pata_acpi
[ 15.746140] CPU: 0 PID: 295 Comm: systemd-udevd Not tainted
3.19.0-15-generic #15-Ubuntu
[ 15.746168] Hardware name: Hewlett-Packard HP Compaq 6000 Pro SFF
PC/3048h, BIOS 786G2 v01.09 08/25/2009
[ 15.746199] task: ffff880191ce93a0 ti: ffff880193648000 task.ti:
ffff880193648000
[ 15.746224] RIP: 0010: [<ffffffff8126e6be>] [<ffffffff8126e6be>]
sysfs_remove_link+0xe/0x30
[ 15.746255] RSP: 0018:ffff88019364ba78 EFLAGS: 00010202
[ 15.746274] RAX: 0000000000000000 RBX: ffff8800d5b4e000 RCX:
00000000ffffffff
[ 15.746298] RDX: ffff88019364ba95 RSI: ffff88019364ba8c RDI:
0000000000000010
[ 15.746322] RBP: ffff88019364ba78 R08: 000000000000000a R09:
000000000000fffb
[ 15.746346] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff8800d5b4e000
[ 15.746369] R13: ffff880191cc4a78 R14: ffff880191cc4a80 R15:
00000000ffffffed
[ 15.746393] FS: 00007fe8946f3880(0000) GS:ffff88019bc00000(0000)
knlGS:0000000000000000
[ 15.746420] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 15.746440] CR2: 0000000000000040 CR3: 000000019367e000 CR4:
00000000000407f0
[ 15.746463] Stack:
[ 15.746473] ffff88019364bab8 ffffffffc05481b3 6e616863d6a98838
323000302d6c656e
[ 15.746507] 0000000000000032 00000000da2bae1e ffff8800d6a98800
ffffffffc054f680
[ 15.746541] ffff88019364bad8 ffffffffc054f6a1 0000000000000000
ffff8800d6a98838
[ 15.746575] Call Trace:
[ 15.746588] [<ffffffffc05481b3>]
i2c_del_mux_adapter+0x53/0x90 [i2c_mux]
[ 15.746614] [<ffffffffc054f680>] ?
m88ds3103_init+0x3f0/0x3f0 [m88ds3103]
[ 15.746638] [<ffffffffc054f6a1>]
m88ds3103_release+0x21/0x30 [m88ds3103]
[ 15.746667] [<ffffffffc05868a5>]
dvb_frontend_detach+0x75/0x90 [dvb_core]
[ 15.746693] [<ffffffffc059dfc6>]
dvb_usbv2_probe+0xc06/0x1200 [dvb_usb_v2]
[ 15.746719] [<ffffffff817c6e56>] ? mutex_lock+0x16/0x40
[ 15.746740] [<ffffffff815c2b5b>] usb_probe_interface+0x1bb/0x300
[ 15.746763] [<ffffffff815064f3>] driver_probe_device+0xa3/0x410
[ 15.746784] [<ffffffff8150693b>] __driver_attach+0x9b/0xa0
[ 15.746805] [<ffffffff815068a0>] ? __device_attach+0x40/0x40
[ 15.746826] [<ffffffff815042bb>] bus_for_each_dev+0x6b/0xb0
[ 15.746847] [<ffffffff81505f5e>] driver_attach+0x1e/0x20
[ 15.746866] [<ffffffff81505b30>] bus_add_driver+0x180/0x250
[ 15.746887] [<ffffffff81507134>] driver_register+0x64/0xf0
[ 15.746908] [<ffffffff815c1342>] usb_register_driver+0x82/0x160
[ 15.746931] [<ffffffffc0544000>] ? 0xffffffffc0544000
[ 15.746952] [<ffffffffc054401e>]
dvbsky_usb_driver_init+0x1e/0x1000 [dvb_usb_dvbsky]
[ 15.746980] [<ffffffff81002148>] do_one_initcall+0xd8/0x210
[ 15.747002] [<ffffffff811d5b49>] ?
kmem_cache_alloc_trace+0x189/0x200
[ 15.747027] [<ffffffff810f99c4>] ? load_module+0x15a4/0x1ce0
[ 15.747047] [<ffffffff810f99fe>] load_module+0x15de/0x1ce0
[ 15.747068] [<ffffffff810f51d0>] ? store_uevent+0x40/0x40
[ 15.747089] [<ffffffff810fa276>] SyS_finit_module+0x86/0xb0
[ 15.747111] [<ffffffff817c934d>] system_call_fastpath+0x16/0x1b
[ 15.747132] Code: 48 8b 35 fe 5b d4 00 48 8b 57 10 e8 0d dd ff ff
5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 66 66 66 66 90 55 48 85 ff 48
89 e5 74 12 <48> 8b 7f 30 31 d2 e8 47 dc ff ff 5d c3 0f 1f 44 00 00 48
8b 3d
[ 15.747358] RIP [<ffffffff8126e6be>] sysfs_remove_link+0xe/0x30
[ 15.747383] RSP <ffff88019364ba78>
[ 15.747397] CR2: 0000000000000040
[ 15.747411] --- [ end trace 0ba2ff80b8cb1db7 ]---
I'd like to know: does this indicate that I have a faulty device; that
the kernel support for the device is faulty - or that there is some
other (Ubuntu-specific?) glitch?
I've noticed that while 'lsusb' works without the Satix device attached,
when the device is attached, lsusb hangs indefinitely - it can be
neither suspended with "^Z" nor terminated with "^C".
Thanks in advance for any advice...
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