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SubjectPROBLEM: Devfs root breaks with some devices in 2.4.19
I'll follow the suggested reporting format as closely as possible to give 
as much information as possible in a common format:

[2.] Full description of the problem:
When passing "root=" parameters to the kernel, certain device strings
referring to devfs devices that used to work in 2.4.18 now no longer work
in 2.4.19. For example, using "root=/dev/discs/disc2/part6" worked as
expected in 2.4.18, and allowed me to move my discs around on the
controllers so long as I maintained the order. However, using the same
command line in 2.4.19 fails completely.

[3.] Keywords:
devfs, root, kernel, boot parameters, init

[4.] Kernel version:
Linux version 2.4.19 (dh@scrat) (gcc version 2.95.4 20011002 (Debian
prerelease)) #1 Mon Aug 19 22:25:45 BST 2002

[5.] Output (no oops, but I can give the appropriate panic):
This is the panic on trying to boot the kernel with the parameter
"root=/dev/discs/disc2/part6". It appears just after the NET4
initialisation message in my configuration:
>>>
VFS: Cannot open root device "discs/disc2/part6" or 00:0d
Please append the correct "root=" boot option
Kernel Panic: VFS: Unable to mount root fs on 00:0d
<<<

[6.] Example:
Try using "root=/dev/discs/disc<d>/part<p>" with <d> and <p> set
appropriately for your configulation. This should be easily reproducable.
Using something like "root=/dev/hdg6" works fine, however.

[7.] Environment
[7.1] Software
Most of this is probably irrelavent at this stage, but I'll include it in
case anyone finds it useful:
>>>
Linux scrat 2.4.19 #1 Mon Aug 19 22:25:45 BST 2002 i686 unknown

Gnu C 2.95.4
Gnu make 3.79.1
util-linux 2.11n
mount 2.11n
modutils 2.4.15
e2fsprogs 1.27
Linux C Library 2.2.5
Dynamic linker (ldd) 2.2.5
Procps 2.0.7
Net-tools 1.60
Console-tools 0.2.3
Sh-utils 2.0.11
Modules Loaded smbfs snd-seq-midi snd-seq-oss snd-pcm-oss
snd-mixer-oss mousedev snd-emu10k1-synth snd-emux-synth snd-seq-midi-emul
snd-seq-virmidi snd-seq-midi-event snd-seq snd-ens1371 snd-emu10k1 snd-pcm
snd-timer snd-hwdep snd-util-mem snd-rawmidi snd-seq-device snd-ac97-codec
snd soundcore hid irtty irda 3c59x nls_iso8859-1 nls_cp437 vfat fat floppy
serial md lvm-mod eeprom lm75 lm80 i2c-proc i2c-viapro i2c-core analog
emu10k1-gp gameport joydev input ipv6
<<<

[7.2.] Processor information:
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 6
model name : AMD Athlon(tm) XP 1800+
stepping : 2
cpu MHz : 1541.242
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips : 3073.63

[7.3.] Module information:
Probably not required at this stage since none will be loaded, but I'll
include it for completeness:
>>>
smbfs 32512 0 (autoclean)
snd-seq-midi 3232 0 (autoclean) (unused)
snd-seq-oss 24608 0 (unused)
snd-pcm-oss 36032 2
snd-mixer-oss 9088 1 (autoclean) [snd-pcm-oss]
mousedev 3904 1
snd-emu10k1-synth 3808 0 (unused)
snd-emux-synth 24224 0 [snd-emu10k1-synth]
snd-seq-midi-emul 4304 0 [snd-emux-synth]
snd-seq-virmidi 2632 0 [snd-emux-synth]
snd-seq-midi-event 2712 0 [snd-seq-midi snd-seq-oss snd-seq-virmidi]
snd-seq 37164 2 [snd-seq-midi snd-seq-oss snd-emux-synth
snd-seq-midi-emul snd-seq-virmidi snd-seq-midi-event]
snd-ens1371 9792 0
snd-emu10k1 55456 3 [snd-emu10k1-synth]
snd-pcm 47680 0 [snd-pcm-oss snd-ens1371 snd-emu10k1]
snd-timer 10272 0 [snd-seq snd-pcm]
snd-hwdep 3776 0 [snd-emu10k1]
snd-util-mem 1120 0 [snd-emux-synth snd-emu10k1]
snd-rawmidi 12096 0 [snd-seq-midi snd-seq-virmidi snd-ens1371
snd-emu10k1]
snd-seq-device 4016 0 [snd-seq-midi snd-seq-oss
snd-emu10k1-synth snd-emux-synth snd-seq snd-emu10k1 snd-rawmidi]
snd-ac97-codec 22560 0 [snd-ens1371 snd-emu10k1]
snd 25064 0 [snd-seq-midi snd-seq-oss snd-pcm-oss
snd-mixer-oss snd-emux-synth snd-seq-virmidi snd-seq-midi-event snd-seq
snd-ens1371 snd-emu10k1 snd-pcm snd-timer snd-hwdep snd-util-mem
snd-rawmidi snd-seq-device snd-ac97-codec]
soundcore 3460 16 [snd]
hid 13248 0 (unused)
irtty 5568 2 (autoclean)
irda 81580 1 (autoclean) [irtty]
3c59x 25064 1 (autoclean)
nls_iso8859-1 2848 1 (autoclean)
nls_cp437 4384 1 (autoclean)
vfat 9468 1 (autoclean)
fat 29496 0 (autoclean) [vfat]
floppy 45920 0 (autoclean)
serial 44128 1 (autoclean)
md 57344 0 (autoclean)
lvm-mod 61312 0 (unused)
eeprom 3072 0
lm75 3232 0
lm80 5472 0
i2c-proc 6272 0 [eeprom lm75 lm80]
i2c-viapro 3752 0 (unused)
i2c-core 12416 0 [eeprom lm75 lm80 i2c-proc i2c-viapro]
analog 7520 0 (unused)
emu10k1-gp 1248 0 (unused)
gameport 1356 0 [analog emu10k1-gp]
joydev 6848 0 (unused)
input 3232 0 [mousedev hid analog joydev]
ipv6 124256 -1
<<<

[7.4.] Loaded driver and hardware information
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial(set)
0376-0376 : ide1
03c0-03df : vga+
03c0-03df : matrox
03f6-03f6 : ide0
03f8-03ff : serial(set)
0cf8-0cff : PCI conf1
5000-500f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
5000-5007 : via2-smbus
6000-607f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
a000-a003 : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System Controller
a400-a40f : VIA Technologies, Inc. Bus Master IDE
a400-a407 : ide0
a408-a40f : ide1
a800-a81f : VIA Technologies, Inc. UHCI USB
a800-a81f : usb-uhci
ac00-ac1f : VIA Technologies, Inc. UHCI USB (#2)
ac00-ac1f : usb-uhci
c000-c01f : Creative Labs SB Live! EMU10k1
c000-c01f : EMU10K1
c400-c407 : Creative Labs SB Live! MIDI/Game Port
c400-c407 : emu10k1-gp
c800-c87f : 3Com Corporation 3c905C-TX/TX-M [Tornado]
c800-c87f : 00:0d.0
cc00-cc3f : Ensoniq 5880 AudioPCI
cc00-cc3f : Ensoniq AudioPCI
d000-d0ff : Adaptec AHA-7850
d400-d407 : Promise Technology, Inc. PDC20276 IDE
d400-d407 : ide2
d800-d803 : Promise Technology, Inc. PDC20276 IDE
d802-d802 : ide2
dc00-dc07 : Promise Technology, Inc. PDC20276 IDE
dc00-dc07 : ide3
e000-e003 : Promise Technology, Inc. PDC20276 IDE
e002-e002 : ide3
e400-e40f : Promise Technology, Inc. PDC20276 IDE
e400-e407 : ide2
e408-e40f : ide3
00000000-0009ffff : System RAM
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000c8000-000ca7ff : Extension ROM
000f0000-000fffff : System ROM
00100000-1ffeffff : System RAM
00100000-00254ae7 : Kernel code
00254ae8-002d4d83 : Kernel data
1fff0000-1fff2fff : ACPI Non-volatile Storage
1fff3000-1fffffff : ACPI Tables
e0000000-e3ffffff : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System
Controller
e4000000-e5ffffff : PCI Bus #01
e4000000-e5ffffff : Matrox Graphics, Inc. MGA G400 AGP
e4000000-e5ffffff : matroxfb FB
e6000000-e8ffffff : PCI Bus #01
e6000000-e6003fff : Matrox Graphics, Inc. MGA G400 AGP
e6000000-e6003fff : matroxfb MMIO
e7000000-e77fffff : Matrox Graphics, Inc. MGA G400 AGP
ea000000-ea003fff : Promise Technology, Inc. PDC20276 IDE
ea004000-ea004fff : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System
Controller
ea005000-ea005fff : Adaptec AHA-7850
ea005000-ea005fff : aic7xxx
ea006000-ea00607f : 3Com Corporation 3c905C-TX/TX-M [Tornado]
ea007000-ea007fff : NEC Corporation USB
ea007000-ea007fff : usb-ohci
ea008000-ea008fff : NEC Corporation USB (#2)
ea008000-ea008fff : usb-ohci
ea009000-ea0090ff : NEC Corporation USB 2.0
ea009000-ea0090ff : ehci-hcd
fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
ffff0000-ffffffff : reserved

[7.5.] PCI information
00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-760 [Irongate] System
Controller (rev 14)
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 0: Memory at e0000000 (32-bit, prefetchable) [size=64M]
Region 1: Memory at ea004000 (32-bit, prefetchable) [size=4K]
Region 2: I/O ports at a000 [disabled] [size=4]
Capabilities: [a0] AGP version 2.0
Status: RQ=15 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-760 [Irongate] AGP
Bridge (prog-if 00 [Normal decode])
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
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: e6000000-e8ffffff
Prefetchable memory behind bridge: e4000000-e5ffffff
BridgeCtl: Parity- SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B-
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 40)
Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
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
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)
(prog-if 8a [Master SecP PriP])
Subsystem: VIA Technologies, Inc. Bus Master IDE
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 a400 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 1a) (prog-if
00 [UHCI])
Subsystem: Unknown device 0925:1234
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, cache line size 08
Interrupt: pin D routed to IRQ 11
Region 4: I/O ports at a800 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 1a) (prog-if
00 [UHCI])
Subsystem: Unknown device 0925:1234
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, cache line size 08
Interrupt: pin D routed to IRQ 11
Region 4: I/O ports at ac00 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.4 SMBus: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
Subsystem: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
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-
Interrupt: pin ? routed to IRQ 9
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0c.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
Subsystem: Creative Labs: Unknown device 8064
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 (500ns min, 5000ns max)
Interrupt: pin A routed to IRQ 12
Region 0: I/O ports at c000 [size=32]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0c.1 Input device controller: Creative Labs SB Live! (rev 07)
Subsystem: Creative Labs Gameport Joystick
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 0: I/O ports at c400 [size=8]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0d.0 Ethernet controller: 3Com Corporation 3c905C-TX [Fast Etherlink]
(rev 30)
Subsystem: 3Com Corporation 3C905C-TX Fast Etherlink for PC Management NIC
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 (2500ns min, 2500ns max), cache line size 08
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at c800 [size=128]
Region 1: Memory at ea006000 (32-bit, non-prefetchable) [size=128]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=2 PME-
00:0e.0 Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 04)
Subsystem: Giga-byte Technology: Unknown device a000
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 32 (3000ns min, 32000ns max)
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at cc00 [size=64]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0f.0 SCSI storage controller: Adaptec AHA-7850 (rev 03)
Subsystem: Adaptec AHA-2904/Integrated AIC-7850
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 (1000ns min, 1000ns max), cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at d000 [disabled] [size=256]
Region 1: Memory at ea005000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:10.0 RAID bus controller: Promise Technology, Inc.: Unknown device 5275
(rev 01) (prog-if 85)
Subsystem: Giga-byte Technology: Unknown device b001
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 32 (1000ns min, 4500ns max), cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at d400 [size=8]
Region 1: I/O ports at d800 [size=4]
Region 2: I/O ports at dc00 [size=8]
Region 3: I/O ports at e000 [size=4]
Region 4: I/O ports at e400 [size=16]
Region 5: Memory at ea000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [60] Power Management version 1
Flags: PMEClk- DSI+ D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:11.0 USB Controller: NEC Corporation USB (rev 41) (prog-if 10 [OHCI])
Subsystem: NEC Corporation USB
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 (250ns min, 10500ns max), cache line size 08
Interrupt: pin A routed to IRQ 12
Region 0: Memory at ea007000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [40] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:11.1 USB Controller: NEC Corporation USB (rev 41) (prog-if 10 [OHCI])
Subsystem: NEC Corporation USB
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 (250ns min, 10500ns max), cache line size 08
Interrupt: pin B routed to IRQ 10
Region 0: Memory at ea008000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [40] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:11.2 USB Controller: NEC Corporation: Unknown device 00e0 (rev 02)
(prog-if 20)
Subsystem: Giga-byte Technology: Unknown device 5004
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 (4000ns min, 8500ns max), cache line size 08
Interrupt: pin C routed to IRQ 5
Region 0: Memory at ea009000 (32-bit, non-prefetchable) [size=256]
Capabilities: [40] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
01:05.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev
04) (prog-if 00 [VGA])
Subsystem: Matrox Graphics, Inc. Millennium G400 16Mb SDRAM
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 (4000ns min, 8000ns max), cache line size 08
Interrupt: pin A routed to IRQ 12
Region 0: Memory at e4000000 (32-bit, prefetchable) [size=32M]
Region 1: Memory at e6000000 (32-bit, non-prefetchable) [size=16K]
Region 2: Memory at e7000000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [f0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=31 SBA+ AGP+ 64bit- FW- Rate=x1

[7.6.] SCSI information
Attached devices:
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: YAMAHA Model: CRW2100S Rev: 1.0H
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 05 Lun: 00
Vendor: RICOH Model: CD-R/RW MP7040S Rev: 1.20
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: CREATIVE Model: DVD-ROM DVD2240E Rev: 1.7A
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 01 Lun: 00
Vendor: TOSHIBA Model: DVD-ROM SD-M1102 Rev: 1426
Type: CD-ROM ANSI SCSI revision: 02

[7.7.] Other information
In case it's of any use, the /dev/discs/disc2/part6 example used above is
normally referring to the non-devfs device /dev/hdg6, but I prefer the
/dev/discs/... format because of the ease of moving drives through the
busses should I need to temporarily add drives to the system.

Looking at the kernel panic, I'd noticed that the "/dev/" part of the
"root=" parameter had been stripped, so I decided to try
"root=/dev//dev/discs/disc2/part6", which does work correctly, as the
kernel strips the first "/dev/" and then proceeds as expected.

I'm assuming the problem lies somewhere in init/do_mounts.c, as this seems
to be where the mangling and processing of the "root=" parameter takes
place, but I am unsure as to who is currently maintaining this particular
section of the kernel, so I have posted here for help.

Currently, circumstances dictate that I cannot gain a cheap, realiable
Internet connection, so I am unable to subscribe to this list. As such, if
replies could by CCd to me, it'd be very much appreciated.

Thanks for your time,
-David Headland.

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