[bug] PIIXn tuning enabled still hangs laptop

From: David Ford (david@kalifornia.com)
Date: Thu Sep 07 2000 - 05:49:46 EST


The ongoing saga of the machine that hates tuning being enabled;
2.4.0-test8-pre6

Boot message w/ PIIXn tuning enabled:
[...]
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
PIIX4: IDE controller on PCI bus 00 dev 39
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
hda: FUJITSU MHG2102AT, ATA DISK drive
hdc: MATSHITA CR-175, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 19640880 sectors (10056 MB) w/512KiB Cache, CHS=1222/255/63,
UDMA(33)
hdc: ATAPI 24X CD-ROM drive, 128kB Cache, DMA
Uniform CD-ROM driver Revision: 3.11
Partition check:
    /dev/ide/host0/bus0/target0/lun0:hda: timeout waiting for DMA
ide_dmaproc: chipset supported ide_dma_timeout func only: 14

<insert hardware hang, HD LED remains on, requires hard power off/on
cycle>

Working boot of test8-pre4 w/out the PIIXn tuning enabled
[...]
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
PIIX4: IDE controller on PCI bus 00 dev 39
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
hda: FUJITSU MHG2102AT, ATA DISK drive
hdc: MATSHITA CR-175, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 19640880 sectors (10056 MB) w/512KiB Cache, CHS=1222/255/63, (U)DMA

hdc: ATAPI 24X CD-ROM drive, 128kB Cache, DMA
Uniform CD-ROM driver Revision: 3.11
Partition check:
 /dev/ide/host0/bus0/target0/lun0: p1 p2 p3
Floppy drive(s): fd0 is 1.44M
[...]

<trimmed>
00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge
(rev 03)
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
        Latency: 64
        Region 0: Memory at e0000000 (32-bit, prefetchable) [size=256M]
        Capabilities: [a0] AGP version 1.0
                Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
                Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>

00:07.0 Bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
        Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0

00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
(prog-if 80 [Master])
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Region 4: I/O ports at ffa0 [size=16]

-d

--
"The difference between 'involvement' and 'commitment' is like an
eggs-and-ham breakfast: the chicken was 'involved' - the pig was
'committed'."


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