Messages in this thread | | | Date | Thu, 12 Jun 2008 15:26:52 +0900 | From | Tejun Heo <> | Subject | Re: macbook pro dvd playback after suspend Buffer I/O error |
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Justin Mattock wrote: > O.K. applied the patch and did what you have described,(except for > sysctl -w / ended up inserting dev.scsi.logging_level=1 in > /etc/sysctl.conf) > This is what dd reported:(same as before) > dd: reading `/dev/sr0':Input/output error > 41+1 records in > 41+1 records out > 43122688 bytes (43 MB) copied, 41.0967 seconds, 1.0 MB/s > > Attached is dmesg of using dd on the first suspend, and playing a dvd > on the second.
Ah.. okay. The drive was becoming ready and the read commands were retried too fast. The drive I tested on was fast enough to deliver the data but yours wasn't. Hmmm.... This is difficult. This also poses problems to live cd distros, I think. We probably need to make sr wait for device readiness. Maybe it's best to put TUR waiting in read error handling. I'll think about it.
Thanks.
-- tejun
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