On Fri, 2004-07-16 at 15:50, Nate Lawson wrote: > While playing back a DVD on my Thinkpad, it hangs at some point (2-5 minutes > after beginning playback). The player is hung in "physrd" and the drive stops > spinning. This hang happens when the drive is in PIO4 or DMA mode. > > However, starting another process (i.e. cat /dev/acd0) spins up the drive and > it works (and the other process begins running again). What's interesting is > that I can quickly trigger this hang by starting IO on a completely different > channel (i.e. dd if=/dev/ad0 of=/dev/null bs=1m). This indicates that it may > be a driver issue since the DVD drive that hangs is on a different channel and > irq than the hard drive. > > Devices: > atapci0: <Intel ICH3 UDMA100 controller> port > 0x1860-0x186f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0 > ata0: at 0x1f0 irq 14 on atapci0 > ata1: at 0x170 irq 15 on atapci0 > [...] > ad0: 19077MB <IC25N020ATMR04-0> [41344/15/63] at ata0-master UDMA100 > ata1-master: FAILURE - ATAPI_RESET no interrupt > acd0: DVDROM <MATSHITADVD-ROM SR-8175> at ata1-master PIO4 > > The same behavior also happens on my DVD/CDRW drive. > ata1-slave: FAILURE - ATAPI_IDENTIFY no interrupt > ata1-slave: FAILURE - ATAPI_IDENTIFY no interrupt > ata1-master: FAILURE - ATAPI_RESET no interrupt > acd0: CDRW <UJDA720 DVD/CDRW> at ata1-master PIO4 Similar issue has been mentioned few days ago in the "DVD/CD reading issues with -CURRENT from 2004-06-27" thread. I have the same problem on my workstation (LG DVD drive), though I don't have very current -CURRENT at the moment. Reseting the drive, as it was suggested in the thread, seems to help it. mayo
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