Bug 67833

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Description of problem:
The Intel 845 chipset's IDE controller is not recognized by the kernel.  The
machine functions, but any significant disk access results in high CPU load
making the machine pretty much unusable until the disk access completes.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Boot a machine with the 845 chipset (e.g., Dell Dimension 4500 or 4500S)
2. Mount a CD-ROM
3. Copy the contents of the CD-ROM to the disk drive

(Alternatively, build a large RPM such as a kernel or XFree86, which has to
unpack large tar files and apply a large number of patches.)

	

Actual Results:  X slows to the point of being unusable.  Xmms (playing mp3s)
starts skipping.  The load average on the machine increases.

Expected Results:  The copy or unpack should have happened in the background
without disrupting the machine's usability for other tasks.

Additional info:

lspci:
00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host Bridge (rev 11)
00:01.0 PCI bridge: Intel Corp. 82845 845 (Brookdale) Chipset AGP Bridge (rev 11)
00:1d.0 USB Controller: Intel Corp.: Unknown device 24c2 (rev 01)
00:1d.1 USB Controller: Intel Corp.: Unknown device 24c4 (rev 01)
00:1d.2 USB Controller: Intel Corp.: Unknown device 24c7 (rev 01)
00:1d.7 USB Controller: Intel Corp.: Unknown device 24cd (rev 01)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corp.: Unknown device 24c0 (rev 01)
00:1f.1 IDE interface: Intel Corp.: Unknown device 24cb (rev 01)
00:1f.3 SMBus: Intel Corp.: Unknown device 24c3 (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation NV20 [GeForce3 Ti200] (rev a3)
02:00.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
02:02.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 0a)
02:02.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 0a)


Excerpt from dmesg:

Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
PCI_IDE: unknown IDE controller on PCI bus 00 device f9, VID=8086, DID=24cb
PCI: Device 00:1f.1 not available because of resource collisions
PCI_IDE: (ide_setup_pci_device:) Could not enable device.
hda: ST380021A, ATA DISK drive
hdb: MAXTOR 6L040J2, ATA DISK drive
hdc: SAMSUNG CDRW/DVD SM-308B, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 156301488 sectors (80026 MB) w/2048KiB Cache, CHS=9729/255/63
hdb: 78177792 sectors (40027 MB) w/1818KiB Cache, CHS=4866/255/63
ide-floppy driver 0.99.newide


Machine is a Dell Dimension 4500; 2.4 GHz Pentium 4; 1 GB RAM.  Two IDE drives:
80 GB ST380021A; 40 GB Maxtor 6L040J2.

Same problem seen on another Dimension 4500 and on three Dimension 4500S
machines (similar chipset -- Intel 845G with Extreme Graphics).

Additional information on request.