From mboxrd@z Thu Jan 1 00:00:00 1970 To: linuxppc-dev@lists.linuxppc.org Subject: dmasound - kernel panic From: Jiri Masik Date: 10 Aug 2000 00:02:03 +0200 Message-ID: <4vu2cu9jqc.fsf@darbujan.fzu.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Hi, I'm testing the new dmasound_awacs patches snd-2.2.17p15-b1-s2.p.bz2 with the rsync pmac-benh kernel as of today. Linux version 2.2.17pre15-ben1 (root@pbuk) (gcc version 2.95.2 20000220 (Debian GNU/Linux)) #10 Wed Aug 9 11:36:18 CEST 2000 I have a Pismo powerbook and the chip is reported as follows DMA sound driver core [Ed 18] [4 buffers of 32k for output] ............................. [4 buffers of 32k for input] DMA sound driver core called by PowerMac (AWACS rev 3 [screamer]) PowerMac (AWACS rev 3 [screamer]) DMA sound driver: sound.format = 0x20 (signed 16 bit big)(Phys: signed 16 bit big) sound.speed = 44100Hz (phys. 44100Hz) sound.stereo = 0x1 (stereo) write_sq.block_size = 256 write_sq.max_count = 4 write_sq.max_active = 4 write_sq.count = 4 write_sq.rear_size = 256 write_sq.active = 2 write_sq.syncing = 0 read_sq.block_size = 0 read_sq.max_count = 0 read_sq.max_active = 0 read_sq.count = 0 read_sq.rear_size = 0 read_sq.active = 0 read_sq.syncing = 0 The audio playback is working fine for mpg123, both headphones and internal speakers. I'd like to record sounds from the built-in mic and I've found that I can crash the kernel by cat /dev/audio. This is the message I'm getting immediately kernel access of bad area pc 0 lr c8822220c address 0 tsk 398 I've put the ksyms to http://darbujan.fzu.cz/~masik/ksymoops/ I'm not familiar with the kernel debugging please let me know if the information is incomplete. thanks, Jiri ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/