[LAU] Strange problems with Audacity

[Sebastian Tschöpel]

Hello Edgar,

> and it is needed to build kernel modules (nvidia etc.). It exactly matches the 
> standard openSUSE 10.3 kernel-rt package.

Do you have a clue if there is an important difference between the 
openSuse 10.3 realtime kernel and a JAD realtime kernel concerning audio 
production? I set up an openSuse 10.3 system with the rt kernel and at 
least jackd can be started in realtime mode. I didn't had the time to 
try a lot more.

Another thing... i tried audacity with the 10.3 standard and realtime 
kernel and in both cases i get the kernel oops [1] though audacity works 
on my working machine. So i guess it has to be an audacity bug that is 
connected with my chipset (firmware), not with the kernel. I'm going to 
write a bug report to the audacity developers but for audio editing:

Is there a comparable jack-capable tool outthere? A tool that will 
provide at least the basic editing, basic dsp (normalize, converting, 
timestretch/pitchshift, eq, amp, maybe spectral view) and 
ladspa-capable? Doesn't have to be a multitracker or very complex. just 
something between basic & advanced.

Best regards,
Sebastian

web: linuxaudioblog.sternenhejim.de


[1] The dmesg output
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BUG: unable to handle kernel NULL pointer dereference at virtual address 
00000068
  printing eip:
f975d077
*pde = 00000000
Oops: 0000 [#1]
SMP
last sysfs file: /devices/pci0000:00/0000:00:04.0/net/eth0/carrier
Modules linked in: ip6t_LOG nf_conntrack_ipv6 xt_pkttype ipt_LOG 
xt_limit af_packet snd_pcm_oss snd_mixer_oss snd_seq_midi 
snd_seq_midi_event snd_seq ip6t_REJECT xt_tcpudp ipt_REJECT xt_state 
iptable_mangle iptable_nat nf_nat iptable_filter ip6table_mangle 
nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables ip6table_filter 
ip6_tables x_tables ipv6 apparmor nls_iso8859_1 nls_cp437 vfat fat fuse 
loop dm_mod joydev snd_ice1712 snd_ice17xx_ak4xxx snd_ak4xxx_adda 
snd_cs8427 snd_ac97_codec snd_pcm snd_timer snd_page_alloc ac97_bus 
snd_i2c skge button snd_mpu401 snd_mpu401_uart snd_rawmidi 
snd_seq_device sr_mod cdrom rtc_cmos snd parport_pc parport rtc_core 
rtc_lib i2c_nforce2 soundcore ns558 gameport ohci1394 i2c_core ieee1394 
forcedeth shpchp pci_hotplug nvidia_agp agpgart sg usbhid hid ff_memless 
sd_mod ehci_hcd ohci_hcd usbcore edd ext3 mbcache jbd fan thermal 
processor sata_sil pata_amd libata scsi_mod
CPU:    0
EIP:    0060:[<f975d077>]    Tainted: G      N VLI
EFLAGS: 00210246   (2.6.22.5-31-default #1)
EIP is at snd_ice1712_capture_open+0x26/0x42 [snd_ice1712]
eax: 00000000   ebx: c1a0b400   ecx: 0000000b   edx: ffffffff
esi: f6e54000   edi: dfa64310   ebp: f0b80ca0   esp: f792fe68
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process audacity (pid: 3587, ti=f792e000 task=f71d0ab0 task.ti=f792e000)
Stack: 00000000 f792feb0 f9733630 f792fe80 f0b80ca0 f0b80ca0 c1b15b60 
fffffff2
        dfa64200 f9733730 f792feb0 00000001 dfa64320 00000000 f71d0ab0 
c011ecc4
        dfa64324 dfa64324 f0b80ca0 f96c6204 f0b80ca0 00000000 c197b0a0 
f96c1382
Call Trace:
  [<f9733630>] snd_pcm_open_substream+0x52/0xab [snd_pcm]
  [<f9733730>] snd_pcm_open+0xa7/0x188 [snd_pcm]
  [<c011ecc4>] default_wake_function+0x0/0xc
  [<f96c1382>] snd_open+0xd4/0x128 [snd]
  [<c0172431>] chrdev_open+0x118/0x133
  [<c0172319>] chrdev_open+0x0/0x133
  [<c016e83f>] __dentry_open+0xc1/0x178
  [<c016e970>] nameidata_to_filp+0x24/0x33
  [<c016e9b6>] do_filp_open+0x37/0x3e
  [<c016e723>] get_unused_fd+0x57/0xb2
  [<c016e9ff>] do_sys_open+0x42/0xc8
  [<c0107e27>] do_syscall_trace+0x12c/0x171
  [<c016eabe>] sys_open+0x1c/0x1e
  [<c0104ea2>] syscall_call+0x7/0xb
  =======================
Code: a7 c6 31 c0 c3 56 b9 38 00 00 00 53 8b 70 70 ba a8 2d 76 f9 8b 58 
08 89 43 54 8d 86 e8 00 00 00 e8 4f 37 a7 c6 8b 83 a0 00 00 00 <8b> 40 
68 a8 02 89 86 f4 00 00 00 75 0a c7 86 f8 00 00 00 80 bb
EIP: [<f975d077>] snd_ice1712_capture_open+0x26/0x42 [snd_ice1712] 
SS:ESP 0068:f792fe68

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------