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lars_msh
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PostPosted: Sun Sep 08, 2002 6:30 pm    Post subject: Strange delay before loading kernel Reply with quote

I have a weird problem with my new Gentoo. Grub seems to load and do its job, and the kernel seems to load (or whatever this process is called) and the system then boots fine.

However, somewhere between Grub and the kernel loading, there is a delay of about 7-8 minutes with this showing:

Code:
Booting 'Gentoo'
kernel /boot/bzImage
     root=/dev/hdb3
[Linux_bzImage, setup=0xa00,
     size=0x14d632]


Apologies if this isn't perfect, I copied it down by hand; also I don't know for sure if this is before or after the kernel loads - I get the above on screen, alone, after selecting Gentoo in Grub. After the long delay, the usual boot stuff scrolls up the screen and the system basically works.

During the delay there is constant 'low level' disk activity (i.e. it's not thrashing madly, but the disk light is on and I can hear some whirring). I think the delay was originally about five minutes and then crept up in length (maybe related to the number of files on the disk?) but I could be wrong.

Apart from this weirdness I can boot fine into Linux and Windows 2000 (with no delay). Here's my /boot/grub/menu.lst (after mounting /boot of course):

Code:
default 0
timeout 30

splashimage=(hd1,0)/boot/grub/splash.xpm.gz

title=Gentoo
root(hd1,0)
kernel /boot/bzImage root=/dev/hdb3

title=Windows 2000
root(hd0,0)
chainloader +1


As you can see, Windows is on "hda" (first IDE disk) and Gentoo is on "hdb" (second disk). I think the boot loader itself is on hda though (not sure how to check now).

Anyway I'm still dual-booting between Windows 2000 and Gentoo so it's a nuisance but not a disaster. Does anyone have any pointers for me? Maybe I messed up the kernel config and should try playing with that? Or is it more likely a Grub config problem? Or something else...

Many thanks. :-)
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pjp
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PostPosted: Sun Sep 08, 2002 6:36 pm    Post subject: Reply with quote

Have you gone through the output of 'dmesg'?
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lars_msh
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PostPosted: Sun Sep 08, 2002 7:22 pm    Post subject: Reply with quote

I must admit I couldn't find anything in there which helped me (by the way I have some prior Linux experience but I'm definitely not an expert!)

I'm not sure if this info from dmesg starts after the delay or before, but anyway there's a lot of stuff so here's most of it...

Code:
Linux version 2.4.19-gentoo-r7 (root@(none)) (gcc version 2.95.3 20010315 (release)) #2 SMP Wed Aug 28 11:30:14 BST 2002
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
 BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000ce000 - 00000000000d0000 (reserved)
 BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000001fef0000 (usable)
 BIOS-e820: 000000001fef0000 - 000000001feff000 (ACPI data)
 BIOS-e820: 000000001feff000 - 000000001ff00000 (ACPI NVS)
 BIOS-e820: 000000001ff00000 - 000000001ff80000 (usable)
 BIOS-e820: 000000001ff80000 - 0000000020000000 (reserved)
 BIOS-e820: 00000000ff800000 - 00000000ffc00000 (reserved)
 BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)
511MB LOWMEM available.
On node 0 totalpages: 130944
zone(0): 4096 pages.
zone(1): 126848 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/hdb3
Found and enabled local APIC!
Initializing CPU#0
Detected 1993.951 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 3932.16 BogoMIPS
Memory: 513272k/523776k available (2004k kernel code, 10052k reserved, 549k data, 256k init, 0k highmem)
Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode cache hash table entries: 32768 (order: 6, 262144 bytes)
Mount cache hash table entries: 8192 (order: 4, 65536 bytes)
Buffer cache hash table entries: 32768 (order: 5, 131072 bytes)
Page-cache hash table entries: 131072 (order: 7, 524288 bytes)
CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0
CPU: L1 I cache: 12K, L1 D cache: 8K
CPU: L2 cache: 256K
CPU: Hyper-Threading is disabled
CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU:     After generic, caps: 3febfbff 00000000 00000000 00000000
CPU:             Common caps: 3febfbff 00000000 00000000 00000000
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0
CPU: L1 I cache: 12K, L1 D cache: 8K
CPU: L2 cache: 256K
CPU: Hyper-Threading is disabled
CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000
Intel machine check reporting enabled on CPU#0.
CPU:     After generic, caps: 3febfbff 00000000 00000000 00000000
CPU:             Common caps: 3febfbff 00000000 00000000 00000000
CPU0: Intel(R) Pentium(R) 4 CPU 2.00GHz stepping 02
per-CPU timeslice cutoff: 731.69 usecs.
task migration cache decay timeout: 1 msecs.
SMP motherboard not detected.
enabled ExtINT on CPU#0
ESR value before enabling vector: 00000000
ESR value after enabling vector: 00000000
Using local APIC timer interrupts.
calibrating APIC timer ...
..... CPU clock speed is 1993.0270 MHz.
..... host bus clock speed is 99.0663 MHz.
cpu: 0, clocks: 99663, slice: 49831
CPU0<T0:99648,T1:49808,D:9,S:49831,C:99663>
PCI: PCI BIOS revision 2.10 entry at 0xfd9a0, last bus=2
PCI: Using configuration type 1
PCI: Probing PCI hardware
Unknown bridge resource 0: assuming transparent
Unknown bridge resource 2: assuming transparent
PCI: Using IRQ router PIIX [8086/2440] at 00:1f.0
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
Journalled Block Device driver loaded
devfs: v1.12 (20020219) Richard Gooch ()
devfs: boot_options: 0x1
Installing knfsd (copyright (C) 1996 ).
NTFS driver v1.1.22 [Flags: R/O]
SGI XFS with ACLs, quota, no debug enabled
parport0: PC-style at 0x378 (0x778) [PCSPP(,...)]
parport0: irq 7 detected
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI ISAPNP enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
lp0: using parport0 (polling).
block: 992 slots per queue, batch=248
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 f9
PIIX4: chipset revision 5
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0x1800-0x1807, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0x1808-0x180f, BIOS settings: hdc:DMA, hdd:DMA
hda: SAMSUNG SV4002H, ATA DISK drive
hdb: IC35L040AVER07-0, ATA DISK drive
hdc: SAMSUNG DVD-ROM SD-616T, ATAPI CD/DVD-ROM drive
hdd: SAMSUNG CD-R/RW DRIVE SW-224B, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 78242976 sectors (40060 MB) w/1945KiB Cache, CHS=4870/255/63, UDMA(100)
hdb: 80418240 sectors (41174 MB) w/1916KiB Cache, CHS=5005/255/63, UDMA(100)
hdc: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.12
hdd: ATAPI 40X CD-ROM CD-R/RW drive, 2048kB Cache, DMA
Partition check:
 /dev/ide/host0/bus0/target0/lun0: p1
 /dev/ide/host0/bus0/target1/lun0: p1 p2 p3 p4
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
Linux Tulip driver version 0.9.15-pre10 (Mar 8, 2002)
PCI: Found IRQ 9 for device 02:0a.0
tulip0:  MII transceiver #1 config 3000 status 7829 advertising 01e1.
eth0: Lite-On 82c168 PNIC rev 32 at 0x2000, 00:A0:CC:D3:72:C5, IRQ 9.
Linux agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 439M
agpgart: Detected Intel i845 chipset
agpgart: AGP aperture is 64M @ 0xec000000
[drm] Initialized tdfx 1.0.0 20010216 on minor 0
[drm] AGP 0.99 on Unknown @ 0xec000000 64MB
[drm] Initialized radeon 1.1.1 20010405 on minor 1
SCSI subsystem driver Revision: 1.00
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
es1371: version v0.30 time 11:31:35 Aug 28 2002
usb.c: registered new driver hub
uhci.c: USB Universal Host Controller Interface driver v1.1
PCI: Found IRQ 11 for device 00:1f.2
PCI: Setting latency timer of device 00:1f.2 to 64
uhci.c: USB UHCI at I/O 0x1820, IRQ 11
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
PCI: Found IRQ 10 for device 00:1f.4
PCI: Setting latency timer of device 00:1f.4 to 64
uhci.c: USB UHCI at I/O 0x1840, IRQ 10
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
USB Mass Storage support registered.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 4096 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 32768)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
Mounted devfs on /dev
Freeing unused kernel memory: 256k freed
hub.c: USB new device connect on bus1/2, assigned device number 2
hub.c: USB hub found
hub.c: 4 ports detected
Adding Swap: 1052248k swap-space (priority -1)
EXT3 FS 2.4-0.9.17, 10 Jan 2002 on ide0(3,67), internal journal
kjournald starting.  Commit interval 5 seconds
EXT3 FS 2.4-0.9.17, 10 Jan 2002 on ide0(3,68), internal journal
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with ordered data mode.
nvidia: loading NVIDIA NVdriver Kernel Module  1.0-2960  Tue May 14 07:41:42 PDT 2002
eth0: Setting full-duplex based on MII#1 link partner capability of 45e1.
NVRM: AGPGART: unknown chipset
NVRM: AGPGART: aperture: 64M @ 0xec000000
NVRM: AGPGART: aperture mapped from 0xec000000 to 0xe19dc000
NVRM: AGPGART: mode 4x
NVRM: AGPGART: allocated 16 pages
PCI: Enabling device 00:1f.5 (0000 -> 0001)
PCI: Found IRQ 9 for device 00:1f.5
PCI: Sharing IRQ 9 with 00:1f.3
PCI: Setting latency timer of device 00:1f.5 to 64
intel8x0: clocking to 48000
NVRM: AGPGART: allocated 258 pages
NVRM: AGPGART: allocated 2304 pages
NVRM: AGPGART: freed 2304 pages
NVRM: AGPGART: freed 258 pages
NVRM: AGPGART: allocated 258 pages
NVRM: AGPGART: freed 258 pages
NVRM: AGPGART: allocated 258 pages
NVRM: AGPGART: freed 258 pages


...cut a load of mostly USB stuff at the end, let me know if it's likely to be needed... also cut out a couple of author e-mail addresses, they probably get enough spam...

Hope that's ok.
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lars_msh
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PostPosted: Fri Sep 13, 2002 5:33 pm    Post subject: Reply with quote

I've fixed this nasty little blighter, at last! :D

While deliberate attempts to understand and fix this problem failed, it eventually went away when I got around to setting up the CD writer.

As shown in my first post above, when my machine was booting the kernel wasn't being passed the necessary hdd=ide-scsi (it's the second drive in my case). I just hadn't got around to it.

I put that into my Grub config, but still I had the long delay booting and still I wasn't able to write CDs. Finally, I discovered that I'd missed out the generic SCSI support (sg) from my kernel, even though all the other stuff was compiled in.

So I changed this one option, recompiled the kernel, put the new bzImage in place... and now it boots straight away! (Plus CD writing works a treat).

I don't know if the lack of SCSI generic support was causing the delay, or if there was some strange error with my kernel that recompiling fixed. Hope this sorry tale is useful for somebody!
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