I may have identified the cause and have a workaround after researching
the network issues using the forums. Two modules have been loading for
the realtek wireless module and my system now seems to be stable after
blacklisting one of them :-
sudo echo "blacklist rtl8192se" >> /etc/modprobe.d/blacklist.conf
this problem also affects 11.04 but without the kernel panic.
The following is a list of the info I gathered
paulo@illustrious:~$ lsmod | grep 819
r8192e_pci 234281 0
rtl8192se 94139 0
rtlwifi 95614 1 rtl8192se
mac80211 272785 2 rtl8192se,rtlwifi
paulo@illustrious:~$ modinfo r8192e_pci | grep 8192
filename:
/lib/modules/3.0.0-12-generic/kernel/drivers/staging/rtl8192e/r8192e_pci.ko
firmware: RTL8192E/data.img
firmware: RTL8192E/main.img
firmware: RTL8192E/boot.img
alias: pci:v000010ECd00008192sv*sd*bc*sc*i*
paulo@illustrious:~$ modinfo rtl8192se | grep 8192
filename:
/lib/modules/3.0.0-12-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192se/rtl8192se.ko
firmware: rtlwifi/rtl8192sefw.bin
description: Realtek 8192S/8191S 802.11n PCI wireless
alias: pci:v000010ECd00008192sv*sd*bc*sc*i*
paulo@illustrious:~$
paulo@illustrious:~$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation N10 Family DMI Bridge [8086:a010]
00:02.0 VGA compatible controller [0300]: Intel Corporation N10 Family
Integrated Graphics Controller [8086:a011]
00:02.1 Display controller [0380]: Intel Corporation N10 Family Integrated
Graphics Controller [8086:a012]
00:1b.0 Audio device [0403]: Intel Corporation N10/ICH 7 Family High Definition
Audio Controller [8086:27d8] (rev 02)
00:1c.0 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port
1 [8086:27d0] (rev 02)
00:1c.1 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port
2 [8086:27d2] (rev 02)
00:1c.2 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port
3 [8086:27d4] (rev 02)
00:1c.3 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port
4 [8086:27d6] (rev 02)
00:1d.0 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI
Controller #1 [8086:27c8] (rev 02)
00:1d.1 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI
Controller #2 [8086:27c9] (rev 02)
00:1d.2 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI
Controller #3 [8086:27ca] (rev 02)
00:1d.3 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI
Controller #4 [8086:27cb] (rev 02)
00:1d.7 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB2 EHCI
Controller [8086:27cc] (rev 02)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge
[8086:2448] (rev e2)
00:1f.0 ISA bridge [0601]: Intel Corporation NM10 Family LPC Controller
[8086:27bc] (rev 02)
00:1f.2 SATA controller [0106]: Intel Corporation N10/ICH7 Family SATA AHCI
Controller [8086:27c1] (rev 02)
00:1f.3 SMBus [0c05]: Intel Corporation N10/ICH 7 Family SMBus Controller
[8086:27da] (rev 02)
05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd.
RTL8192E/RTL8192SE Wireless LAN Controller [10ec:8192] (rev 01)
paulo@illustrious:~$
paulo@illustrious:~$ lspci -v
00:00.0 Host bridge: Intel Corporation N10 Family DMI Bridge
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: agpgart-intel
00:02.0 VGA compatible controller: Intel Corporation N10 Family Integrated
Graphics Controller (prog-if 00 [VGA controller])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, fast devsel, latency 0, IRQ 44
Memory at f0200000 (32-bit, non-prefetchable) [size=512K]
I/O ports at 18d0 [size=8]
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at f0000000 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
00:02.1 Display controller: Intel Corporation N10 Family Integrated Graphics
Controller
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, fast devsel, latency 0
Memory at f0280000 (32-bit, non-prefetchable) [size=512K]
Capabilities: <access denied>
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio
Controller (rev 02)
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at f0300000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev
02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=05, subordinate=05, sec-latency=0
I/O behind bridge: 00002000-00002fff
Memory behind bridge: f0100000-f01fffff
Prefetchable memory behind bridge: 0000000080c00000-0000000080dfffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev
02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=07, subordinate=07, sec-latency=0
I/O behind bridge: 00005000-00005fff
Memory behind bridge: 80800000-809fffff
Prefetchable memory behind bridge: 0000000080a00000-0000000080bfffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.2 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 3 (rev
02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=09, subordinate=09, sec-latency=0
I/O behind bridge: 00004000-00004fff
Memory behind bridge: 80400000-805fffff
Prefetchable memory behind bridge: 0000000080600000-00000000807fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev
02) (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: 00003000-00003fff
Memory behind bridge: 80000000-801fffff
Prefetchable memory behind bridge: 0000000080200000-00000000803fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#1 (rev 02) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, medium devsel, latency 0, IRQ 23
I/O ports at 1820 [size=32]
Kernel driver in use: uhci_hcd
00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#2 (rev 02) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, medium devsel, latency 0, IRQ 19
I/O ports at 1840 [size=32]
Kernel driver in use: uhci_hcd
00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#3 (rev 02) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at 1860 [size=32]
Kernel driver in use: uhci_hcd
00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller
#4 (rev 02) (prog-if 00 [UHCI])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at 1880 [size=32]
Kernel driver in use: uhci_hcd
00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller
(rev 02) (prog-if 20 [EHCI])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f0504000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) (prog-if
01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=11, subordinate=11, sec-latency=32
Capabilities: <access denied>
00:1f.0 ISA bridge: Intel Corporation NM10 Family LPC Controller (rev 02)
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel modules: iTCO_wdt
00:1f.2 SATA controller: Intel Corporation N10/ICH7 Family SATA AHCI Controller
(rev 02) (prog-if 01 [AHCI 1.0])
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 45
I/O ports at 18e8 [size=8]
I/O ports at 18dc [size=4]
I/O ports at 18e0 [size=8]
I/O ports at 18d8 [size=4]
I/O ports at 18c0 [size=16]
Memory at f0504400 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 02)
Subsystem: Samsung Electronics Co Ltd Device c072
Flags: medium devsel, IRQ 10
I/O ports at 18a0 [size=32]
Kernel modules: i2c-i801
05:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8192E/RTL8192SE
Wireless LAN Controller (rev 01)
Subsystem: Askey Computer Corp. Device 7160
Flags: bus master, fast devsel, latency 0, IRQ 16
I/O ports at 2000 [size=256]
Memory at f0100000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: rtl819xE
Kernel modules: r8192e_pci, rtl8192se
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https://bugs.launchpad.net/bugs/879615
Title:
kernel panic on shutdown
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