Description of problem: I'm using fc7 and kernel 2.6.21-1.3228.fc7. The system has two IDE drives and one ATAPI CD burner / DVD reader. The cabling has the first (boot) IDE drive as primary master, the ATAPI device as primary slave, and the second IDE drive as secondary master. The machine works up until the point when I try and mount a CD or DVD. The machine starts logging ata errors on the console, and becomes completely unresponsive except to repeat those logs. I've swapped out cables and tried other configurations (like removing the second IDE drive altogether and setting the boot IDE drive as primary master and the ATAPI device as secondary master). Same result. Version-Release number of selected component (if applicable): Fedora 7, kernel 2.6.21-1.3228.fc7. How reproducible: mount /dev/cdrom /mnt/cdrom Here is the console output during the failure: ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x28 data 4096 in res 40/00:03:00:00:20/00:00:00:00:00/b0 Emask 0x4 (timeout) ata1: port is slow to respond, please be patient (Status 0xd0) ata1: port failed to respond (30 secs, Status 0xd0) ata1: port is slow to respond, please be patient (Status 0x80) ata1: port failed to respond (30 secs, Status 0x80) ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ata1.00: revalidation failed (errno=-2) ata1: failed to recover some devices, retrying in 5 secs SCSI device sda: 39851760 512-byte hdwr sectors (20404 MB) ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x28 data 4096 in res 40/00:03:00:00:20/00:00:00:00:00/b0 Emask 0x4 (timeout) ata1: port is slow to respond, please be patient (Status 0xd0) ata1: port failed to respond (30 secs, Status 0xd0) ata1: port is slow to respond, please be patient (Status 0x80) ata1: port failed to respond (30 secs, Status 0x80) ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ATA: abnormal status 0x80 on port 0x000101f7 ata1.00: revalidation failed (errno=-2) ata1: failed to recover some devices, retrying in 5 secs Here is lspci: 00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03) 00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03) 00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02) 00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01) 00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01) 00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02) 00:0b.0 Ethernet controller: VIA Technologies, Inc. VT86C100A [Rhine] (rev 06) 00:0d.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet Controller (rev 05) 01:00.0 VGA compatible controller: S3 Inc. 86c368 [Trio 3D/2X] (rev 02) Here is dmesg: Linux version 2.6.21-1.3228.fc7 (kojibuilder.redhat.com) (gcc version 4.1.2 20070502 (Red Hat 4.1.2-12)) #1 SMP Tue Jun 12 15:37:31 EDT 2007 BIOS-provided physical RAM map: sanitize start sanitize end copy_e820_map() start: 0000000000000000 size: 00000000000a0000 end: 00000000000a0000 type: 1 copy_e820_map() type is E820_RAM copy_e820_map() start: 00000000000f0000 size: 0000000000010000 end: 0000000000100000 type: 2 copy_e820_map() start: 0000000000100000 size: 0000000027ef0000 end: 0000000027ff0000 type: 1 copy_e820_map() type is E820_RAM copy_e820_map() start: 0000000027ff0000 size: 0000000000003000 end: 0000000027ff3000 type: 4 copy_e820_map() start: 0000000027ff3000 size: 000000000000d000 end: 0000000028000000 type: 3 copy_e820_map() start: 00000000ffff0000 size: 0000000000010000 end: 0000000100000000 type: 2 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 0000000027ff0000 (usable) BIOS-e820: 0000000027ff0000 - 0000000027ff3000 (ACPI NVS) BIOS-e820: 0000000027ff3000 - 0000000028000000 (ACPI data) BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) 0MB HIGHMEM available. 639MB LOWMEM available. Using x86 segment limits to approximate NX protection Entering add_active_range(0, 0, 163824) 0 entries of 256 used Zone PFN ranges: DMA 0 -> 4096 Normal 4096 -> 163824 HighMem 163824 -> 163824 early_node_map[1] active PFN ranges 0: 0 -> 163824 On node 0 totalpages: 163824 DMA zone: 32 pages used for memmap DMA zone: 0 pages reserved DMA zone: 4064 pages, LIFO batch:0 Normal zone: 1247 pages used for memmap Normal zone: 158481 pages, LIFO batch:31 HighMem zone: 0 pages used for memmap DMI 2.2 present. Using APIC driver default ACPI: RSDP 000F6AF0, 0014 (r0 AWARD ) ACPI: RSDT 27FF3000, 0028 (r1 AWARD AWRDACPI 42302E31 AWRD 0) ACPI: FACP 27FF3040, 0074 (r1 AWARD AWRDACPI 42302E31 AWRD 0) ACPI: DSDT 27FF30C0, 1F5C (r1 AWARD AWRDACPI 1000 MSFT 100000C) ACPI: FACS 27FF0000, 0040 ACPI: DMI BIOS year==0, assuming ACPI-capable machine ACPI: PM-Timer IO Port: 0x4008 Allocating PCI resources starting at 30000000 (gap: 28000000:d7ff0000) Built 1 zonelists. Total pages: 162545 Kernel command line: ro root=LABEL=/ rhgb quiet Local APIC disabled by BIOS -- you can enable it with "lapic" mapped APIC to ffffd000 (0150c000) Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Initializing CPU#0 CPU 0 irqstacks, hard=c077c000 soft=c075c000 PID hash table entries: 4096 (order: 12, 16384 bytes) Detected 451.026 MHz processor. Console: colour VGA+ 80x25 Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) Memory: 641692k/655296k available (2066k kernel code, 13040k reserved, 1092k data, 240k init, 0k highmem) virtual kernel memory layout: fixmap : 0xffc56000 - 0xfffff000 (3748 kB) pkmap : 0xff800000 - 0xffc00000 (4096 kB) vmalloc : 0xe8800000 - 0xff7fe000 ( 367 MB) lowmem : 0xc0000000 - 0xe7ff0000 ( 639 MB) .init : 0xc071b000 - 0xc0757000 ( 240 kB) .data : 0xc0604bc2 - 0xc0715cb4 (1092 kB) .text : 0xc0400000 - 0xc0604bc2 (2066 kB) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay using timer specific routine.. 902.66 BogoMIPS (lpj=451333) Security Framework v1.0.0 initialized SELinux: Initializing. SELinux: Starting in permissive mode selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 512 CPU: After generic identify, caps: 0383f9ff 00000000 00000000 00000000 00000000 00000000 00000000 CPU: L1 I cache: 16K, L1 D cache: 16K CPU: L2 cache: 512K CPU: After all inits, caps: 0383f1ff 00000000 00000000 00000040 00000000 00000000 00000000 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. Checking 'hlt' instruction... OK. SMP alternatives: switching to UP code Freeing SMP alternatives: 14k freed ACPI: Core revision 20070126 ACPI: setting ELCR to 0200 (from 1c00) CPU0: Intel Pentium III (Katmai) stepping 03 SMP motherboard not detected. Local APIC not detected. Using dummy APIC emulation. Brought up 1 CPUs sizeof(vma)=84 bytes sizeof(page)=32 bytes sizeof(inode)=336 bytes sizeof(dentry)=132 bytes sizeof(ext3inode)=488 bytes sizeof(buffer_head)=56 bytes sizeof(skbuff)=176 bytes sizeof(task_struct)=1376 bytes Time: 11:49:52 Date: 05/27/107 NET: Registered protocol family 16 ACPI: bus type pci registered PCI: PCI BIOS revision 2.10 entry at 0xfb320, last bus=1 PCI: Using configuration type 1 Setting up standard PCI resources ACPI: Interpreter enabled ACPI: (supports S0 S1 S5) ACPI: Using PIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (0000:00) PCI: Probing PCI hardware (bus 00) * Found PM-Timer Bug on the chipset. Due to workarounds for a bug, * this clock source is slow. Consider trying other clock sources PCI quirk: region 4000-403f claimed by PIIX4 ACPI PCI quirk: region 5000-500f claimed by PIIX4 SMB Boot video device is 0000:01:00.0 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 10 11 *12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 *11 12 14 15) Linux Plug and Play Support v0.97 (c) Adam Belay pnp: PnP ACPI init pnp: PnP ACPI: found 12 devices usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb PCI: Using ACPI for IRQ routing PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report NetLabel: Initializing NetLabel: domain hash size = 128 NetLabel: protocols = UNLABELED CIPSOv4 NetLabel: unlabeled traffic allowed by default pnp: 00:00: iomem range 0xf0000-0xf3fff could not be reserved pnp: 00:00: iomem range 0xf4000-0xf7fff could not be reserved pnp: 00:00: iomem range 0xf8000-0xfbfff could not be reserved pnp: 00:00: iomem range 0xfc000-0xfffff could not be reserved Time: tsc clocksource has been installed. PCI: Bridge: 0000:00:01.0 IO window: disabled. MEM window: d0000000-d7ffffff PREFETCH window: 30000000-300fffff NET: Registered protocol family 2 IP route cache hash table entries: 32768 (order: 5, 131072 bytes) TCP established hash table entries: 131072 (order: 8, 1572864 bytes) TCP bind hash table entries: 65536 (order: 7, 524288 bytes) TCP: Hash tables configured (established 131072 bind 65536) TCP reno registered checking if image is initramfs...<6>Switched to high resolution mode on CPU 0 it is Freeing initrd memory: 2808k freed apm: BIOS version 1.2 Flags 0x07 (Driver version 1.16ac) apm: overridden by ACPI. audit: initializing netlink socket (disabled) audit(1182944993.159:1): initialized Total HugeTLB memory allocated, 0 VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) SELinux: Registering netfilter hooks ksign: Installing public key data Loading keyring - Added public key 949CEA51B56F22EC - User ID: Red Hat, Inc. (Kernel Module GPG key) io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) Limiting direct PCI/PCI transfers. pci_hotplug: PCI Hot Plug PCI Core version: 0.5 ACPI: Fan [FAN0] (on) ACPI: CPU0 (power states: C1[C1] C2[C2]) ACPI: Processor [CPU0] (supports 2 throttling states) isapnp: Scanning for PnP cards... pnp: SB audio device quirk - increasing port range pnp: AWE32 quirk - adding two ports isapnp: Card 'Creative SB32 PnP' isapnp: 1 Plug & Play card detected total Real Time Clock Driver v1.12ac Non-volatile memory driver v1.2 Linux agpgart interface v0.102 (c) Dave Jones agpgart: Detected an Intel 440BX Chipset. agpgart: AGP aperture is 64M @ 0xd8000000 Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled Time: acpi_pm clocksource has been installed. serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A serial8250: ttyS2 at I/O 0x3e8 (irq = 5) is a 16550A 00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A 00:09: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize input: Macintosh mouse button emulation as /class/input/input0 usbcore: registered new interface driver libusual usbcore: registered new interface driver hiddev usbcore: registered new interface driver usbhid drivers/usb/input/hid-core.c: v2.6:USB HID core driver PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1 PNP: PS/2 controller doesn't have AUX irq; using default 12 serio: i8042 KBD port at 0x60,0x64 irq 1 mice: PS/2 mouse device common for all mice input: AT Translated Set 2 keyboard as /class/input/input1 TCP bic registered Initializing XFRM netlink socket NET: Registered protocol family 1 NET: Registered protocol family 17 Using IPI No-Shortcut mode Magic number: 11:980:833 drivers/rtc/hctosys.c: unable to open rtc device (rtc0) Freeing unused kernel memory: 240k freed Write protecting the kernel read-only data: 820k USB Universal Host Controller Interface driver v3.0 ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11 PCI: setting IRQ 11 as level-triggered ACPI: PCI Interrupt 0000:00:07.2[D] -> Link [LNKD] -> GSI 11 (level, low) -> IRQ 11 uhci_hcd 0000:00:07.2: UHCI Host Controller uhci_hcd 0000:00:07.2: new USB bus registered, assigned bus number 1 uhci_hcd 0000:00:07.2: irq 11, io base 0x0000e000 usb usb1: configuration #1 chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver SCSI subsystem initialized libata version 2.20 loaded. ata_piix 0000:00:07.1: version 2.10ac1 ata1: PATA max UDMA/33 cmd 0x000101f0 ctl 0x000103f6 bmdma 0x0001f000 irq 14 ata2: PATA max UDMA/33 cmd 0x00010170 ctl 0x00010376 bmdma 0x0001f008 irq 15 scsi0 : ata_piix ata1.00: ATA-4: ST320420A, 3.21, max UDMA/66 ata1.00: 39851760 sectors, multi 16: LBA ata1.01: ATAPI, max MWDMA2 ata1.00: configured for UDMA/33 ata1.01: configured for MWDMA2 scsi1 : ata_piix ata2.00: ata_hpa_resize 1: sectors = 586114704, hpa_sectors = 586114704 ata2.00: ATA-7: Maxtor 6L300R0, BAJ41G20, max UDMA/133 ata2.00: 586114704 sectors, multi 16: LBA48 ata2.00: ata_hpa_resize 1: sectors = 586114704, hpa_sectors = 586114704 ata2.00: configured for UDMA/33 scsi 0:0:0:0: Direct-Access ATA ST320420A 3.21 PQ: 0 ANSI: 5 SCSI device sda: 39851760 512-byte hdwr sectors (20404 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA SCSI device sda: 39851760 512-byte hdwr sectors (20404 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 sda3 sd 0:0:0:0: Attached scsi disk sda scsi 0:0:1:0: CD-ROM HL-DT-ST RW/DVD GCC-4120B 2.00 PQ: 0 ANSI: 5 scsi 1:0:0:0: Direct-Access ATA Maxtor 6L300R0 BAJ4 PQ: 0 ANSI: 5 SCSI device sdb: 586114704 512-byte hdwr sectors (300091 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: write cache: enabled, read cache: enabled, doesn't support DPO or FUA SCSI device sdb: 586114704 512-byte hdwr sectors (300091 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdb: sdb1 sd 1:0:0:0: Attached scsi disk sdb EXT3-fs: INFO: recovery required on readonly filesystem. EXT3-fs: write access will be enabled during recovery. kjournald starting. Commit interval 5 seconds EXT3-fs: recovery complete. EXT3-fs: mounted filesystem with ordered data mode. security: 3 users, 6 roles, 1816 types, 78 bools, 1 sens, 1024 cats security: 60 classes, 65638 rules SELinux: Completing initialization. SELinux: Setting up existing superblocks. SELinux: initialized (dev sda3, type ext3), uses xattr SELinux: initialized (dev usbfs, type usbfs), uses genfs_contexts SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs SELinux: initialized (dev debugfs, type debugfs), uses genfs_contexts SELinux: initialized (dev selinuxfs, type selinuxfs), uses genfs_contexts SELinux: initialized (dev mqueue, type mqueue), uses transition SIDs SELinux: initialized (dev hugetlbfs, type hugetlbfs), uses genfs_contexts SELinux: initialized (dev devpts, type devpts), uses transition SIDs SELinux: initialized (dev eventpollfs, type eventpollfs), uses task SIDs SELinux: initialized (dev inotifyfs, type inotifyfs), uses genfs_contexts SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs SELinux: initialized (dev futexfs, type futexfs), uses genfs_contexts SELinux: initialized (dev pipefs, type pipefs), uses task SIDs SELinux: initialized (dev sockfs, type sockfs), uses task SIDs SELinux: initialized (dev cpuset, type cpuset), uses genfs_contexts SELinux: initialized (dev proc, type proc), uses genfs_contexts SELinux: initialized (dev bdev, type bdev), uses genfs_contexts SELinux: initialized (dev rootfs, type rootfs), uses genfs_contexts SELinux: initialized (dev sysfs, type sysfs), uses genfs_contexts audit(1182945004.311:2): policy loaded auid=4294967295 sd 0:0:0:0: Attached scsi generic sg0 type 0 scsi 0:0:1:0: Attached scsi generic sg1 type 5 sd 1:0:0:0: Attached scsi generic sg2 type 0 sr0: scsi3-mmc drive: 0x/32x writer cd/rw xa/form2 cdda tray Uniform CD-ROM driver Revision: 3.20 sr 0:0:1:0: Attached scsi CD-ROM sr0 Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 piix4_smbus 0000:00:07.3: Found 0000:00:07.3 device via-rhine.c:v1.10-LK1.4.3 2007-03-06 Written by Donald Becker ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10 PCI: setting IRQ 10 as level-triggered ACPI: PCI Interrupt 0000:00:0b.0[A] -> Link [LNKB] -> GSI 10 (level, low) -> IRQ 10 eth0: VIA Rhine at 0xdd040000, 00:50:ba:a1:2a:b0, IRQ 10. eth0: MII PHY found at address 8, status 0x782d advertising 05e1 Link 0000. input: PC Speaker as /class/input/input2 Intel(R) PRO/1000 Network Driver - version 7.3.20-k2-NAPI Copyright (c) 1999-2006 Intel Corporation. ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 12 PCI: setting IRQ 12 as level-triggered ACPI: PCI Interrupt 0000:00:0d.0[A] -> Link [LNKC] -> GSI 12 (level, low) -> IRQ 12 e1000: 0000:00:0d.0: e1000_probe: (PCI:33MHz:32-bit) 00:0e:0c:aa:8b:db pnp: Device 01:01.03 activated. gameport: NS558 PnP Gameport is pnp01:01.03/gameport0, io 0x200, speed 710kHz e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection parport: PnPBIOS parport detected. parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,EPP] loop: loaded (max 8 devices) lp0: using parport0 (interrupt-driven). lp0: console ready sonypi: Sony Programmable I/O Controller Driver v1.26. No dock devices found. input: Power Button (FF) as /class/input/input3 ACPI: Power Button (FF) [PWRF] input: Power Button (CM) as /class/input/input4 ACPI: Power Button (CM) [PWRB] ibm_acpi: ec object not found device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised: dm-devel device-mapper: multipath: version 1.0.5 loaded EXT3 FS on sda3, internal journal kjournald starting. Commit interval 5 seconds EXT3 FS on sda1, internal journal EXT3-fs: mounted filesystem with ordered data mode. SELinux: initialized (dev sda1, type ext3), uses xattr SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs Adding 1052248k swap on /dev/sda2. Priority:-1 extents:1 across:1052248k SELinux: initialized (dev binfmt_misc, type binfmt_misc), uses genfs_contexts IA-32 Microcode Update Driver: v1.14a <tigran.co.uk> ip_tables: (C) 2000-2006 Netfilter Core Team Netfilter messages via NETLINK v0.30. nf_conntrack version 0.5.0 (5119 buckets, 40952 max) NET: Registered protocol family 10 lo: Disabled Privacy Extensions Mobile IPv6 e1000: eth0: e1000_watchdog: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX eth1: link up, 10Mbps, half-duplex, lpa 0x0000 audit(1182945051.440:3): audit_pid=1860 old=0 by auid=4294967295 subj=system_u:system_r:auditd_t:s0 eth0: no IPv6 routers present SELinux: initialized (dev rpc_pipefs, type rpc_pipefs), uses genfs_contexts eth1: no IPv6 routers present SELinux: initialized (dev autofs, type autofs), uses genfs_contexts SELinux: initialized (dev autofs, type autofs), uses genfs_contexts SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
Hello David, I'm reviewing this bug as part of the kernel bug triage project, an attempt to isolate current bugs in the fedora kernel. http://fedoraproject.org/wiki/KernelBugTriage I am CC'ing myself to this bug and will try and assist you in resolving it if I can. There hasn't been much activity on this bug for a while. Could you tell me if you are still having problems with the latest kernel? If the problem no longer exists then please close this bug or I'll do so in a few days if there is no additional information lodged. Cheers Chris
I don't know how much more I can add. The problem was never resolved, but (for this reason and others), the machine in question was replaced. The new machine has the same two hard drives and ATAPI burner, but a different motherboard, and does not suffer from this problem.
Okay, sorry it took a while for someone to respond David. I'm closing this CANTFIX as obviously it is no longer possible to troubleshoot the problem, though it will still be accessible in bugzilla. Please re-open however if you think I am wrong to do this however. Cheers Chris