Comment 26 for bug 7825

reverting the patch didn't help.

nothing in dmesg at the time of the test; here's the relevant portion of dmesg
from the boot:

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SIS5513: IDE controller at PCI slot 0000:00:02.5
ACPI: PCI interrupt 0000:00:02.5[A] -> GSI 16 (level, low) -> IRQ 177
SIS5513: chipset revision 0
SIS5513: not 100% native mode: will probe irqs later
SIS5513: SiS 962/963 MuTIOL IDE UDMA133 controller
    ide0: BM-DMA at 0x4000-0x4007, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0x4008-0x400f, BIOS settings: hdc:DMA, hdd:DMA
hda: Maxtor 6Y200P0, ATA DISK drive
Using anticipatory io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: max request size: 1024KiB
hda: 398297088 sectors (203928 MB) w/7936KiB Cache, CHS=24792/255/63, UDMA(133)
 /dev/ide/host0/bus0/target0/lun0: p1 p2 < p5 p6 p7 p8 p9 p10 >
hdc: SONY DVD RW DRU-510A, ATAPI CD/DVD-ROM drive
hdd: HITACHI DVD-ROM GD-7500, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
SGI XFS with ACLs, security attributes, realtime, large block numbers, no debug
enabled