Hi All, This is one of the problems I have been seeing with the intel8x0 driver as well. The problem occurs when you call snd_pcm_start a second time after an xrun, or after you have shut down a program with ctl-c and started it again in the same console. I used the
If you close the console and open a new one the problem seems to go away!? I used the example code pcm.c from the alsa-lib test directory. It occurs with both [nforce2 ALC650] combo and [Intel 82901EB-ICH5 Analog devices id 75]. I also have a problem when the drivers have been running for a long time (around 5 hours). Without an xrun the snd_pcm_delay() function starts returning impossible numbers. Checking drift against either rdtsc or gettimeofday() alsa starts giving me a 0.1 second per second drift. I haven't got a machine I can set up for this style of kernel debugging unfortunately, so I am trying to code around these problems. richard. -----Original Message----- From: Takashi Iwai [mailto:[EMAIL PROTECTED] Sent: Tuesday, 11 November 2003 4:37 AM To: Vladimir I. Umnov Cc: James Courtier-Dutton; [EMAIL PROTECTED] Subject: Re: [Alsa-devel] nforce2 (snd_intel8x0) channels scrolling At Sun, 9 Nov 2003 20:37:15 +0300, Vladimir I. Umnov wrote: > > On Sun, 09 Nov 2003 15:25:25 +0000 > James Courtier-Dutton <[EMAIL PROTECTED]> wrote: > > > Vladimir I. Umnov wrote: > > > Hw: a7n8x deluxe 2.0 (nforce2-c1 + MCP-T) > > > Sw: 2.6.0-test8, alsa-lib from cvs > > > lspci: > > > 00:05.0 Multimedia audio controller: nVidia Corporation: Unknown > > > device 006b (rev a2) Subsystem: Asustek Computer, Inc.: > > > Unknown device 0c11 Flags: bus master, 66Mhz, fast devsel, > > > latency 0, IRQ 5 > > > Memory at d7000000 (32-bit, non-prefetchable) [size=512K] > > > Capabilities: [44] Power Management version 2 > > > > > > 00:06.0 Multimedia audio controller: nVidia Corporation: Unknown > > > device 006a (rev a1) Subsystem: Asustek Computer, Inc.: > > > Unknown device 8095 Flags: bus master, 66Mhz, fast devsel, > > > latency 0, IRQ 11 > > > I/O ports at e400 [size=256] > > > I/O ports at d000 [size=128] > > > Memory at d7087000 (32-bit, non-prefetchable) [size=4K] > > > Capabilities: [44] Power Management version 2 > > > > > > Mplayer and xine used for testing in 6channels mode. > > > Channels mapping stays wrong after: > > > 1) snd_pcm_drop() called (seeking and quit); > > > 2) after long time of playing in 6channels mode, even without x-run. > > > > > > p.s. My sblive works very well now, but my friends doesn't have > > > sblive and they want working 6channels audio under linux on nforce2. > > > > > > p.p.s. I may help with testing or finding a bug, but I need help. I > > > new to alsa-driver and can't understand how it works, and can't find > > > how snd_pcm_drop() implemented in i810 module. > > > > > > > > Here is a simple speaker test program. > > I nicely tests different speaker layout modes. > > > > Read the readme.txt file that is with it on how to use it. > > If you still get the problem with this simple program, it is certainly > > a bug in alsa. > After channels scrolled (after a few seek in mplayer, then quit), > ./speaker_test-Dsurround51-c 6 works wrong (Center->Front Left, > LFE->Front Right, ...). > But after I use "front" device and then repeat test with 6 channels > setup, channel mapping is ok. > If i press ctrl+c with 6channels test and then repeat it > (snd_pcm_drop()) scrool is apear, and after i run 3 times, channels > mapping is ok. > > With sblive all works perfectly!!! This is alsa-driver bug. try to change the mapping of surround51 device in /usr/share/alsa/cards/NFORCE.conf. Takashi ------------------------------------------------------- This SF.Net email sponsored by: ApacheCon 2003, 16-19 November in Las Vegas. Learn firsthand the latest developments in Apache, PHP, Perl, XML, Java, MySQL, WebDAV, and more! http://www.apachecon.com/ _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel ------------------------------------------------------- This SF.Net email sponsored by: ApacheCon 2003, 16-19 November in Las Vegas. Learn firsthand the latest developments in Apache, PHP, Perl, XML, Java, MySQL, WebDAV, and more! http://www.apachecon.com/ _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
