Hi,
it's about one year that I'm using my Native Instruments Audio Kontrol 1 (USB2 audio/MIDI interface) only with audio applications and it has been working well so far. Now I'm trying to use it with Rosegarden (MIDI) and, as soon as I start Rosegarden, JACK crashes, the process jackd becomes "uninterruptible" and with the command dmesg I find the following new lines
[ 1935.173876] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000044 [ 1935.173885] printing eip: f8a5f6fd *pde = 00000000 [ 1935.173891] Oops: 0000 [#1] PREEMPT SMP [ 1935.173896] Modules linked in: isofs udf ipv6 af_packet i915 drm rfcomm l2cap bluetooth ppdev acpi_cpufreq cpufreq_ondemand cpufreq_conservative cpufreq_stats freq_table cpufreq_userspace cpufreq_powersave dock container sbs sbshc iptable_filter ip_tables x_tables sbp2 parport_pc lp parport snd_hda_intel snd_usb_caiaq snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_seq_oss snd_pcm ecb blkcipher snd_seq_midi snd_page_alloc joydev snd_rawmidi snd_seq_midi_event snd_seq iwl3945 sdhci serio_raw mmc_core iwlwifi_mac80211 video output cfg80211 battery led_class ac snd_timer snd_seq_device wmi_acer button snd evdev dcdbas iTCO_wdt iTCO_vendor_support intel_agp shpchp pci_hotplug pcspkr soundcore agpgart psmouse ext3 jbd mbcache sg sr_mod cdrom sd_mod b44 ata_generic ssb mii ohci1394 ieee1394 ata_piix pata_acpi libata scsi_mod ehci_hcd uhci_hcd usbcore thermal processor fan fuse [ 1935.173964] [ 1935.173967] Pid: 1421, comm: IRQ-18 Not tainted (2.6.24-19-rt #1) [ 1935.173970] EIP: 0060:[<f8a5f6fd>] EFLAGS: 00010292 CPU: 1 [ 1935.173979] EIP is at snd_rawmidi_transmit_peek+0x1d/0x100 [snd_rawmidi] [ 1935.173982] EAX: 00000000 EBX: f7106264 ECX: 0000003d EDX: f7106407 [ 1935.173985] ESI: ffffffea EDI: 00000000 EBP: f7106407 ESP: df85be38 [ 1935.173988] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 preempt:00000001 [ 1935.173991] Process IRQ-18 (pid: 1421, ti=df85a000 task=f7d45320 task.ti=df85a000) [ 1935.173993] Stack: 0000003d 00000000 f7106264 00000000 00000000 df83fc00 f8b8cc09 00000000 [ 1935.174000] f7106264 f710630c 00000000 df83fc00 df83fc00 f710630c f888c888 00000008 [ 1935.174007] df83fd08 00000000 f710630c f8870770 f728a0c0 f728a0c0 ffffff8d f721e180 [ 1935.174014] Call Trace: [ 1935.174021] [<f8b8cc09>] snd_usb_caiaq_midi_send+0x29/0x80 [snd_usb_caiaq] [ 1935.174034] [<f888c888>] usb_hcd_giveback_urb+0x48/0xc0 [usbcore] [ 1935.174064] [<f8870770>] ehci_urb_done+0x70/0xb0 [ehci_hcd] [ 1935.174075] [<f887153f>] qh_completions+0x24f/0x430 [ehci_hcd] [ 1935.174087] [<f8870770>] ehci_urb_done+0x70/0xb0 [ehci_hcd] [ 1935.174096] [<f887293e>] ehci_work+0x51e/0x810 [ehci_hcd] [ 1935.174103] [<c010b1e3>] sched_clock+0x13/0x40 [ 1935.174116] [<c0129199>] dequeue_task_rt+0xb9/0x1c0 [ 1935.174129] [<f8875498>] ehci_irq+0x158/0x1c0 [ehci_hcd] [ 1935.174142] [<f888cb7b>] usb_hcd_irq+0x2b/0x60 [usbcore] [ 1935.174166] [<c016a9cc>] handle_IRQ_event+0x5c/0x100 [ 1935.174178] [<c016b00a>] thread_simple_irq+0x4a/0x90 [ 1935.174185] [<c016b959>] do_irqd+0x229/0x290 [ 1935.174194] [<c016b730>] do_irqd+0x0/0x290 [ 1935.174199] [<c0141fc2>] kthread+0x42/0x70 [ 1935.174203] [<c0141f80>] kthread+0x0/0x70 [ 1935.174209] [<c0105857>] kernel_thread_helper+0x7/0x10 [ 1935.174217] ======================= [ 1935.174219] Code: 24 10 83 c4 14 c3 bf ea ff ff ff eb e3 90 83 ec 18 89 74 24 0c be ea ff ff ff 89 6c 24 14 89 d5 89 5c 24 08 89 7c 24 10 89 0c 24 <8b> 58 44 8b 7b 04 85 ff 0f 84 8e 00 00 00 8d 43 20 31 f6 89 44 [ 1935.174256] EIP: [<f8a5f6fd>] snd_rawmidi_transmit_peek+0x1d/0x100 [snd_rawmidi] SS:ESP 0068:df85be38 [ 1935.174265] ---[ end trace 9090d02b798b5496 ]---
I already asked to the Rosegarden and JACK people, but they couldn't help me: it seems to be a driver related problem, as I can happily use Rosegarden if I run JACK with the internal Intel sound card.
The program versions I'm using are: jackd 0.116.1, rosegarden 1.7.2.
Here's some other outputs:
$ uname -a Linux din6400 2.6.24-19-rt #1 SMP PREEMPT RT Thu Aug 21 02:08:03 UTC 2008 i686 GNU/Linux
$ cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 1.0.17. Compiled on Jan 3 2009 for kernel 2.6.24-19-rt (SMP).
$ grep VERSION_STR /usr/include/alsa/version.h #define SND_LIB_VERSION_STR "1.0.17a"
$ aplay -l **** Lista di PLAYBACK dispositivi hardware **** scheda 0: Intel [HDA Intel], dispositivo 0: STAC92xx Analog [STAC92xx Analog] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 0: Intel [HDA Intel], dispositivo 1: STAC92xx Digital [STAC92xx Digital] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 1: A1 [Audio Kontrol 1], dispositivo 0: Audio Kontrol 1 [Audio Kontrol 1] Sottoperiferiche: 1/2 Sottoperiferica #0: subdevice #0 Sottoperiferica #1: subdevice #1
$ cat /proc/interrupts CPU0 CPU1 0: 5438968 0 IO-APIC-edge timer 1: 5123 0 IO-APIC-edge i8042 8: 7 0 IO-APIC-edge rtc 9: 2 0 IO-APIC-fasteoi acpi 12: 570309 0 IO-APIC-edge i8042 14: 16584 0 IO-APIC-edge libata 15: 7712 0 IO-APIC-edge libata 16: 312032 0 IO-APIC-fasteoi i915@pci:0000:00:02.0 17: 2 0 IO-APIC-fasteoi ohci1394 18: 269358 0 IO-APIC-fasteoi uhci_hcd:usb1, ehci_hcd:usb5 19: 3999 0 IO-APIC-fasteoi uhci_hcd:usb2, HDA Intel 20: 0 0 IO-APIC-fasteoi uhci_hcd:usb3 21: 0 0 IO-APIC-fasteoi uhci_hcd:usb4 22: 7638 0 IO-APIC-fasteoi eth0 23: 0 0 IO-APIC-fasteoi sdhci:slot0 221: 31667 0 PCI-MSI-edge iwl3945 NMI: 0 0 Non-maskable interrupts LOC: 266694 2894868 Local timer interrupts RES: 1091345 1871342 Rescheduling interrupts CAL: 12287 11042 function call interrupts TLB: 1395 1581 TLB shootdowns TRM: 0 0 Thermal event interrupts SPU: 0 0 Spurious interrupts ERR: 0 MIS: 0
I do not include the jackd and rosegarden outputs becouse they are quite long, but, if you think they are useful to understand what is going on, I can send them too.
Any ideas?
Thank you
Marco