Bug 450191

Summary: DMA mode disabled for DVD drive, reverts to PIO4
Product: [Fedora] Fedora Reporter: James <james>
Component: kernelAssignee: Alan Cox <alan>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: low    
Version: 9CC: kernel-maint, pizza
Target Milestone: ---Keywords: Reopened
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: 2.6.25.6-55.fc9 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-06-13 02:27:23 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
dmesg output with the problem none

Description James 2008-06-05 19:36:05 UTC 
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):
kernel-2.6.25.4-29.fc9.i686

How reproducible:
Always.

Steps to Reproduce:
1. Boot.

Actual results:
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.

Expected results:
Multi-word DMA available for the DVD drive.
Comment 1 James 2008-06-05 19:36:05 UTC 
Created attachment 308479 [details]
dmesg output with the problem
Comment 2 Alan Cox 2008-06-05 20:48:41 UTC 
Fixed upstream already.
Comment 3 James 2008-06-05 21:23:04 UTC 
Any idea when the fix will filter its way down into F9/what should I look out
for on Koji?
Comment 4 Dave Jones 2008-06-05 21:27:25 UTC 
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.
Comment 5 Chuck Ebbert 2008-06-06 00:28:55 UTC 
Fixed in 2.6.25.4-44
Comment 6 Alan Cox 2008-06-06 09:11:49 UTC 
(The real fix is mostly not to load pata_acpi in the wrong order)
Comment 7 Chuck Ebbert 2008-06-06 09:40:51 UTC 
*** Bug 450225 has been marked as a duplicate of this bug. ***
Comment 8 Solomon Peachy 2008-06-07 12:40:41 UTC 
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.
Comment 9 James 2008-06-07 17:38:25 UTC 
Confirmed fixed in kernel-2.6.25.5-49.fc9, closing.
Comment 10 Chuck Ebbert 2008-06-10 03:15:22 UTC 
Bug will be closed automatically when a new kernel gets released.
Comment 11 Fedora Update System 2008-06-12 01:38:36 UTC 
kernel-2.6.25.6-55.fc9 has been submitted as an update for Fedora 9
Comment 12 Fedora Update System 2008-06-13 02:26:55 UTC 
kernel-2.6.25.6-55.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.