Messages in this thread Patch in this message | | | Date | Thu, 15 Oct 1998 16:56:38 -0600 | From | Sean Connor <> | Subject | Re: Show stoppers |
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On Wed, Oct 14, 1998 at 06:56:11PM -0400, Ion Badulescu wrote: > On Tue, 13 Oct 1998 17:54:43 EDT, Gregory Maxwell wrote: > > > > Speaking of sound... > > > > Sound still hard-locks my computer: > > > > Dual 166MMX > > Buslogic SCSI > > Awe 32 *OR* Plain SB16 > > > > Most recently tested kernel: 2.1.125+ac2. > > Same here, but on a VIA VP3 motherboard, UP. 2.1.125 locks up hard when using > either a SB16 or a CS4236 at 44.1kHz. So not even "voodoo programming" helps.. > > + /* I hate voodoo programming but .. */ > + udelay(20); > > I can try it with larger udelay() values if the author (Alan?) thinks it could > make a difference.
Don't bother. I've tried it, and it doesn't work. The only thing that seems to help is the following patch, originally by Andrea Arcangeli.
Note that this is against stock 2.1.125 -- I don't know if it will cleanly apply against the ac series.
--- linux/drivers/sound/dmabuf.c~ Wed Sep 2 14:23:22 1998 +++ linux/drivers/sound/dmabuf.c Sun Oct 11 13:10:12 1998 @@ -614,7 +614,6 @@ else { int chan = dmap->dma; clear_dma_ff(chan); - disable_dma(dmap->dma); pos = get_dma_residue(chan); pos = dmap->bytes_in_use - pos; @@ -633,7 +632,6 @@ pos = 0; if (pos >= dmap->bytes_in_use) pos = 0; - enable_dma(dmap->dma); } restore_flags(flags); /* printk( "%04x ", pos); */ @@ -989,9 +987,7 @@ if (!(dmap->flags & DMA_NODMA)) { int chan = dmap->dma, pos, n; clear_dma_ff(chan); - disable_dma(dmap->dma); pos = dmap->bytes_in_use - get_dma_residue(chan); - enable_dma(dmap->dma); pos = pos / dmap->fragment_size; /* Actual qhead */ if (pos < 0 || pos >= dmap->nbufs) pos = 0; @@ -1079,9 +1075,7 @@ if (!(dmap->flags & DMA_NODMA)) { int chan = dmap->dma, pos, n; clear_dma_ff(chan); - disable_dma(dmap->dma); pos = dmap->bytes_in_use - get_dma_residue(chan); - enable_dma(dmap->dma); pos = pos / dmap->fragment_size; /* Actual qhead */ if (pos < 0 || pos >= dmap->nbufs)
-- -Sean Connor (sec@konatsu.ml.org) (sec@cableregina.com) (sec@softhome.net)
The day Microsoft produces something that doesn't suck is the day they start making vacuum cleaners.
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