Messages in this thread | | | Date | Tue, 20 Jun 2006 01:37:41 -0700 | From | Andrew Morton <> | Subject | Re: USB/hal: USB open() broken? (USB CD burner underruns, USB HDD hard resets) |
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On Mon, 19 Jun 2006 10:21:54 +0200 Andreas Mohr <andi@rhlx01.fht-esslingen.de> wrote:
> I'm having severe issues with cdrecord aborting with "buffer underrun" > message, *always*. Problem nailed, see below.
[hald polling causes cdrecord to go bad on a USB CD drive]
One possible reason is that we're shooting down the device's pagecache by accident as a result of hald activity. This shouldn't happen, but still. Could you please do
`watch -n1 cat /proc/meminfo' and/or `vmstat 1'
then run cdrecord
then wait a bit
then run hald, see if the amount of pagecache (/proc/meminfo:Buffers or /proc/meminfo:Cached) suddenly decreases.
If the answer is "no" then I guess there's some unpleasant interaction happening at the USB level
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