Hello Khalid,
> Are you not loading the driver for your disk drive controller when the
> new kernel boots up, even though you are not using the driver for disk
> I/O? If yes, the driver should have re-enabled Bus Master bit in its
> init routine. If you are loading the driver, which driver is it? I can
> take a look at it and see if there is anything missing in the
> initialization routine. Can you also include output from "lspci -v" from
> your machine?
I'm not loading any drivers in my new kernel, I'm just doing pure BIOS disk I/O
using Int13 calls (the program I start using kexec I would not actually call a
'kernel', it's just a very tiny piece of software which does some disk I/O and
output on the screen).
Attached you find the output of lspci -v
Best regards
Christian
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and
945GT Express Memory Controller Hub (rev 03)
Subsystem: Dell Device 01d4
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=09 <?>
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS,
943/940GML Express Integrated Graphics Controller (rev 03) (prog-if 00 [VGA
controller])
Subsystem: Dell Device 01d4
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at eff00000 (32-bit, non-prefetchable) [size=512K]
I/O ports at eff8 [size=8]
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at efec0000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML
Express Integrated Graphics Controller (rev 03)
Subsystem: Dell Device 01d4
Flags: bus master, fast devsel, latency 0
Memory at eff80000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [d0] Power Management version 2
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition
Audio Controller (rev 01)
Subsystem: Dell Device 01d4
Flags: bus master, fast devsel, latency 0, IRQ 10
Memory at efebc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [130] Root Complex Link
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1
(rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=0b, subordinate=0b, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: c4000000-c41fffff
Prefetchable memory behind bridge: 00000000c4200000-00000000c43fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Dell Device 01d4
Capabilities: [a0] Power Management version 2
Capabilities: [100] Virtual Channel
Capabilities: [180] Root Complex Link
Kernel driver in use: pcieport
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2
(rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=0c, subordinate=0c, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: efd00000-efdfffff
Prefetchable memory behind bridge: 00000000c4400000-00000000c45fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Dell Device 01d4
Capabilities: [a0] Power Management version 2
Capabilities: [100] Virtual Channel
Capabilities: [180] Root Complex Link
Kernel driver in use: pcieport
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #1 (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 0, IRQ 9
I/O ports at bf80 [size=32]
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #2 (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 0, IRQ 10
I/O ports at bf60 [size=32]
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #3 (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 0, IRQ 5
I/O ports at bf40 [size=32]
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #4 (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 0, IRQ 3
I/O ports at bf20 [size=32]
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI
Controller (rev 01) (prog-if 20 [EHCI])
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 0, IRQ 9
Memory at ffa80000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Kernel driver in use: ehci_hcd
Kernel modules: ehci-hcd
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1) (prog-if
01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=06, sec-latency=32
I/O behind bridge: 00004000-00004fff
Memory behind bridge: efc00000-efcfffff
Prefetchable memory behind bridge: 00000000c0000000-00000000c3ffffff
Capabilities: [50] Subsystem: Dell Device 01d4
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge
(rev 01)
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE
Controller (rev 01) (prog-if 80 [Master])
Subsystem: Dell Device 01d4
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 7
I/O ports at 01f0 [size=8]
I/O ports at 03f4 [size=1]
I/O ports at 0170 [size=8]
I/O ports at 0374 [size=1]
I/O ports at bfa0 [size=16]
Capabilities: [70] Power Management version 2
Kernel driver in use: ata_piix
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
Subsystem: Dell Device 01d4
Flags: medium devsel, IRQ 11
I/O ports at 10c0 [size=32]
02:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
Subsystem: Dell Device 01d4
Flags: bus master, fast devsel, latency 64, IRQ 7
Memory at efcfe000 (32-bit, non-prefetchable) [size=8K]
Capabilities: [40] Power Management version 2
Kernel driver in use: b44
Kernel modules: b44
02:01.0 CardBus bridge: O2 Micro, Inc. Cardbus bridge (rev 21)
Subsystem: Dell Device 01d4
Flags: bus master, stepping, slow devsel, latency 168, IRQ 5
Memory at c8000000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=02, secondary=03, subordinate=06, sec-latency=176
Memory window 0: c0000000-c3fff000 (prefetchable)
Memory window 1: cc000000-cffff000
I/O window 0: 00004000-000040ff
I/O window 1: 00004400-000044ff
16-bit legacy interface ports at 0001
Kernel driver in use: yenta_cardbus
Kernel modules: yenta_socket
02:01.4 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)
(prog-if 10 [OHCI])
Subsystem: Dell Device 01d4
Flags: bus master, medium devsel, latency 64, IRQ 5
Memory at efcfd000 (32-bit, non-prefetchable) [size=4K]
Memory at efcfc800 (32-bit, non-prefetchable) [size=2K]
Capabilities: [60] Power Management version 2
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan]
Network Connection (rev 02)
Subsystem: Intel Corporation Device 1021
Flags: bus master, fast devsel, latency 0, IRQ 7
Memory at efdff000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [e0] Express Legacy Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-18-de-ff-ff-94-bc-2f
Kernel driver in use: iwl3945
Kernel modules: iwl3945
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