Messages in this thread | | | Date | Thu, 7 Jan 1999 22:27:19 -0500 | From | Greg Wooledge <> | Subject | 2.2.0-pre5 SB16 problem: /dev/dsp does not work (DMA problem?) |
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Not sure where to send this. This is only my second kernel bug report ever. Go easy on me, ok? :-)
I've searched the mailing list archives and noticed that this problem has been reported for quite some time. But I didn't see any satisfactory answers.
I'm running 2.2.0-pre5 on a K6-2 system, with a Soundblaster ViBRA16 (Plug and Play). See techy details at the end of this message.
I can play *.au files ("Hello, this is Linus Torvalds...") to /dev/audio with no problem.
But whenever I try to write data to /dev/dsp (e.g., to play an MP3) I get no sound output. dmesg shows the line:
Sound: DMA (output) timed out - IRQ/DRQ config error?
which appears over and over until I interrupt the process writing to /dev/dsp.
This is also my first real experience with PnP. At first I thought I must have done something wrong with isapnp, but I get identical results with every combination I've tried. (I also got the same results with 2.1.132.)
I have not yet tried sound under a 2.0 kernel on this system, but I do get sounds with many games under Win98 (ulch) installed on this system. I don't know which of them are 8-bit vs. 16-bit, but all evidence so far indicates that the card works.
I get the same behavior with the distributed.net RC5DES client running or not running (SIGSTOP'ed). There are no other resource-intensive processes running during this testing.
OK, here's the fun stuff....
jekyll# dmesg Linux version 2.2.0-pre5 (root@jekyll) (gcc version 2.7.2.3) #2 Thu Jan 7 20:57:58 EST 1999 Detected 333112313 Hz processor. Console: colour VGA+ 80x25 Calibrating delay loop... 665.19 BogoMIPS Memory: 63544k/65536k available (588k kernel code, 412k reserved, 960k data, 32k init) CPU: AMD AMD-K6(tm) 3D processor Checking 386/387 coupling... OK, FPU using exception 16 error reporting. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX PCI: PCI BIOS revision 2.10 entry at 0xfb3d0 PCI: Using configuration type 1 PCI: Probing PCI hardware PCI: 00:38 [1106/0586]: Work around ISA DMA hangs (00) Activating ISA DMA hang workarounds. [...] Soundblaster audio driver Copyright (C) by Hannu Savolainen 1993-1996 SB 4.16 detected OK (220) Sound: DMA (output) timed out - IRQ/DRQ config error? Sound: DMA (output) timed out - IRQ/DRQ config error? [...]
jekyll# grep -v '^#' /etc/isapnp.conf [...] (CONFIGURE CTL00f0/-1 (LD 0
(INT 0 (IRQ 5 (MODE +E))) (DMA 0 (CHANNEL 1)) (DMA 1 (CHANNEL 3)) (IO 0 (SIZE 16) (BASE 0x0220)) (IO 1 (SIZE 2) (BASE 0x0330)) (IO 2 (SIZE 4) (BASE 0x0388))
(NAME "CTL00f0/-1[0]{Audio }")
(ACT Y) )) [...]
jekyll# cat /etc/conf.modules [...] alias eth0 ne alias sound sb alias midi opl3 options ne io=0x6c00 irq=9 options opl3 io=0x388 options sb io=0x220 irq=5 dma=1 dma16=5 mpu_io=0x330 [...]
jekyll# lsmod Module Size Used by sb 27700 0 (autoclean) uart401 5588 0 (autoclean) [sb] sound 55300 0 (autoclean) [sb uart401] soundcore 2084 6 (autoclean) [sb sound] [...]
jekyll# cat /proc/sound OSS/Free:3.8s2++-971130 Load type: Driver loaded as a module Kernel: Linux jekyll 2.2.0-pre5 #2 Thu Jan 7 20:57:58 EST 1999 i586 Config options: 0
Installed drivers:
Card config:
Audio devices: 0: Sound Blaster 16 (4.16) (DUPLEX)
Synth devices:
Midi devices: 0: Sound Blaster 16
Timers: 0: System clock
Mixers: 0: Sound Blaster
jekyll# cat /proc/interrupts CPU0 0: 212887 XT-PIC timer 1: 8195 XT-PIC keyboard 2: 0 XT-PIC cascade 5: 23 XT-PIC soundblaster 9: 7809 XT-PIC NE2000 12: 46547 XT-PIC PS/2 Mouse 13: 1 XT-PIC fpu 14: 6105 XT-PIC ide0 NMI: 0
jekyll# cat /proc/dma 1: SoundBlaster8 4: cascade 5: SoundBlaster16
jekyll# cat /proc/ioports 0000-001f : dma1 0020-003f : pic1 0040-005f : timer 0060-006f : keyboard 0080-008f : dma page reg 00a0-00bf : pic2 00c0-00df : dma2 00f0-00ff : fpu 01f0-01f7 : ide0 0220-022f : soundblaster 02f8-02ff : serial(set) 0330-0333 : MPU-401 UART 03c0-03df : vga+ 03f6-03f6 : ide0 03f8-03ff : serial(set) 6400-6407 : ide0 6408-640f : ide1 6c00-6c1f : NE2000
$ strace mpg123 02-Cruel.mp3 [...] open("/dev/dsp", O_WRONLY) = 4 ioctl(4, SNDCTL_DSP_GETBLKSIZE, 0x8068df8) = 0 ioctl(4, SNDCTL_DSP_RESET, 0) = 0 ioctl(4, SNDCTL_DSP_SETFMT, 0xbffff828) = 0 ioctl(4, SNDCTL_DSP_STEREO, 0xbffff824) = 0 ioctl(4, SNDCTL_DSP_SPEED, 0xbffff820) = 0 close(4) = 0 open("/dev/dsp", O_WRONLY) = 4 ioctl(4, SNDCTL_DSP_GETBLKSIZE, 0x8068df8) = 0 ioctl(4, SNDCTL_DSP_RESET, 0) = 0 ioctl(4, SNDCTL_DSP_SETFMT, 0xbffff92c) = 0 ioctl(4, SNDCTL_DSP_STEREO, 0xbffff928) = 0 ioctl(4, SNDCTL_DSP_SPEED, 0xbffff924) = 0 write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16384) = 16384 write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16384) = 16384 write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16384) = 16384 write(4, "7\0\364\377/\0\322\377)\0\336\377"..., 16384) = 16384 write(4, "t\0\373\377q\0\324\377\203\0\361"..., 16384 <unfinished ...>
jekyll# modprobe --version modprobe (Linux modutils) 2.1.121 [...]
jekyll# cat /etc/debian_version 2.1
(As you can see) I can provide lots and lots of details if anyone needs them... just ask.
-- Greg Wooledge | Distributed.NET http://www.distributed.net/ wooledge@kellnet.com | because a CPU is a terrible thing to waste. http://www.kellnet.com/wooledge/ |
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