I'm using Dell Inspiron 1520 and Kubuntu Maverick.
I've installed 4Gb of RAM (instead of 2Gb) and after that kernel crashes appeared.
I've run memtest. I've run BIOS built-in hardware test utility. There are reporting no problem.
I've even updated BIOS to latest revision (A09).
I've tried mainline kernel (2.6.37-092637rc7-generic) -- system cannot even boot, there is kernel panic.
It says something like this:
------------------------------
Kernel panic - not syncing: map_single: bounce buffer is not DMA'ble
Pid: xxx, comm: NetworkManager Tainted: P 2.6.37-02637rc7-generic
Call trace:
... panic ...
... default_spin_lock_flags ...
... swiotlb_tbl_map_single ...
... map_single ...
------------------------------
I've googled "bounce buffer is not DMA'ble" and found 'fixed' bugs in old kernels (2007-2008) in swiotlb with some mmaps in first 4Gb of RAM.
I don't if it is related, but my dmesg has line "Memory: 4041352k/4456448k available (5711k kernel code, 264216k absent, 150880k reserved, 5379k data, 908k init)".
BIOS reports 256Mb of RAM is absent so, maybe there is some errors in the way kernel detects and occupies memory?
Hangs in kernel from maverick are random.
Sometimes it just hangs in GUI.
Sometimes it hangs and caps+scroll lock leds are blinking.
I've tried to leave computer in console, and sometimes kernel says "Unable to handle kernel NULL pointer dereference" in a cycle and keyboard does not work (maybe it's the same symptom as hanged GUI?)
I cant really debug this oops/panics because I can't boot with cmdline "console=ttyUSB0,...".
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-24-generic 2.6.35-24.42
Regression: No
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic x86_64
NonfreeKernelModules: nvidia wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: afunix 3358 F.... knotify4
afunix 4150 F.... kmix
afunix 4304 F.... amarok
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfebfc000 irq 45'
Mixer name : 'SigmaTel STAC9205'
Components : 'HDA:838476a0,102801f1,00100204 HDA:14f12c06,14f1000f,00100000'
Controls : 19
Simple ctrls : 12
Date: Tue Dec 28 23:57:28 2010
EcryptfsInUse: Yes
Frequency: This has only happened once.
HibernationDevice: RESUME=/dev/mapper/afbook-swap
MachineType: Dell Inc. Inspiron 1520
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-24-generic root=/dev/mapper/hostname-root ro quiet splash
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=ru_RU.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 07/11/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0UW306
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/11/2008:svnDellInc.:pnInspiron1520:pvr:rvnDellInc.:rn0UW306:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1520
dmi.sys.vendor: Dell Inc.
Look at the bug 688383. It has similar as similar kernel boot Call Trace. I have also a DEL Vostro 1700 with 4GB of RAM.
I also reported this bug to: http://
It is a regression (possibly from 2.6.36-2 onwards). Mainline kernel 2.6.37-rc8 doesn't work either.
It was already tagged as a regression (see: http://
Try to use Mainline kernel 2.6.36-2 from: http://
and (just in case)
follow the guidelines from: https:/
Meanwhile, let see if the problem is solved soon.
carlos