Red Hat Bugzilla – Bug 450191
DMA mode disabled for DVD drive, reverts to PIO4
Last modified: 2008-06-12 22:27:23 EDT
Description of problem:
The kernel is disabling DMA for the DVD drive on my HP zx5030EA (ATI IXP-based)
notebook, making transfers very slow. I've never seen this problem in previous
releases of Fedora.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
The following is seen in dmesg:
ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x8060 irq 14
ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x8068 irq 15
ata1.00: ATA-6: IC25N060ATMR04-0, MO3OAD0A, max UDMA/100
ata1.00: 117210240 sectors, multi 16: LBA48
ata1.00: configured for UDMA/100
ata2.00: ATAPI: HL-DT-STCD-RW/DVD DRIVE GCC-4241N, 0C29, max MWDMA2
ata2.00: simplex DMA is claimed by other device, disabling DMA
ata2.00: configured for PIO4
Very slow DVD drive.
Multi-word DMA available for the DVD drive.
Created attachment 308479 [details]
dmesg output with the problem
Fixed upstream already.
Any idea when the fix will filter its way down into F9/what should I look out
for on Koji?
alan, do you have the git hash or a pointer to the patch? we can throw this into
f9 as an update until .26 lands.
Fixed in 126.96.36.199-44
(The real fix is mostly not to load pata_acpi in the wrong order)
*** Bug 450225 has been marked as a duplicate of this bug. ***
Glad to hear a fix is in and will filter down the intertubes soon-ish.
Meanwhile, Blacklisting pata_acpi seems to have done the trick for my laptop.
Confirmed fixed in kernel-188.8.131.52-49.fc9, closing.
Bug will be closed automatically when a new kernel gets released.
kernel-184.108.40.206-55.fc9 has been submitted as an update for Fedora 9
kernel-220.127.116.11-55.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.