Bugs bugs bugs. Also having this problem. Hardware is: https://wiki.ubuntu.com/LaptopTestingTeam/CompaqPresarioV2600CTO
all_generic_ide=1 doesn't fix it. Hardware is fine: works perfectly in windoze. Possibly related is that my laptop also suffers from this bug: https://bugs.launchpad.net/ubuntu/+bug/175022/ which disables the DMA on my dvd. Curiously, after disabling the workaround in the bug above but enabling all_generic_ide=1 on the kernel command line, the dvd goes back to MWDMA2, which is what I get using the workaround. various outputs after enabling all_generic_ide=1: dmesg | grep -i ata [ 46.054199] libata version 3.00 loaded. [ 46.055768] scsi0 : ata_generic [ 46.055876] scsi1 : ata_generic [ 46.056814] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x8410 irq 14 [ 46.056861] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x8418 irq 15 [ 46.221624] ata1.00: ATA-6: HTS424040M9AT00, MA2OA72A, max UDMA/100 [ 46.221672] ata1.00: 78140160 sectors, multi 16: LBA [ 46.221728] ata1.00: configured for UDMA/100 [ 46.540958] ata2.00: ATAPI: MATSHITADVD-RAM UJ-840S, 1.11, max MWDMA2 [ 46.541014] ata2.00: configured for MWDMA2 [ 46.541153] scsi 0:0:0:0: Direct-Access ATA HTS424040M9AT00 MA2O PQ: 0 ANSI: 5 hdparm -i /dev/scd0 /dev/scd0: Model=MATSHITADVD-RAM UJ-840S , FwRev=1.11 , SerialNo= Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=0kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2 AdvancedPM=no Drive conforms to: Unspecified: ATA/ATAPI-3,4,5,6 * signifies the current active mode -- DVD writer not working since hardy upgrade https://bugs.launchpad.net/bugs/228624 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
