Sharath, as per http://www.dell.com/support/troubleshooting/us/en/19/Product/xps-14-l421x an update is available for your BIOS (A14). If you update to this following https://help.ubuntu.com/community/BiosUpdate , does it change anything?
If not, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Tags added: bios-outdated-a14 needs-upstream-testing regression- release ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1226728 Title: Wifi Driver crashes very ofter on kernel version 3.8.0-x, Dell XPS Laptop Status in “linux” package in Ubuntu: Incomplete Bug description: After upgrade to Ubuntu 13.04, I have observed random Wifi Driver Crashes. The frequency I have observed is about once or twice a day (10 hrs or usage per day). No particular steps to reprroduce, but the just random crashes. The issue is seen in both patch 30 and 31 of the kernel version 3.8.0. Full dmesg logs are attached with the bug. The below is the stack trace from dmesg [ 972.637382] [<ffffffff810589bf>] warn_slowpath_common+0x7f/0xc0 [ 972.637389] [<ffffffff81058abc>] warn_slowpath_fmt+0x4c/0x50 [ 972.637408] [<ffffffffa01ea361>] ? iwl_grab_nic_access_silent+0xe1/0x120 [iwlwifi] [ 972.637424] [<ffffffffa01ea41e>] iwl_grab_nic_access+0x7e/0x90 [iwlwifi] [ 972.637439] [<ffffffffa01ea8d6>] iwl_write_prph+0x46/0xc0 [iwlwifi] [ 972.637458] [<ffffffffa01f300a>] iwl_pcie_tx_stop+0x4a/0x140 [iwlwifi] [ 972.637476] [<ffffffffa01f63cf>] iwl_trans_pcie_stop_device+0xcf/0x460 [iwlwifi] [ 972.637492] [<ffffffffa039f34d>] iwl_down+0x21d/0x320 [iwldvm] [ 972.637508] [<ffffffffa03a4775>] iwlagn_mac_stop+0x65/0xd0 [iwldvm] [ 972.637546] [<ffffffffa02ef561>] ieee80211_stop_device+0x51/0xf0 [mac80211] [ 972.637575] [<ffffffffa02d9db1>] ieee80211_do_stop+0x2a1/0x650 [mac80211] [ 972.637585] [<ffffffff815e9391>] ? dev_deactivate_many+0x201/0x250 [ 972.637611] [<ffffffffa02da17a>] ieee80211_stop+0x1a/0x20 [mac80211] [ 972.637619] [<ffffffff815c63cd>] __dev_close_many+0x7d/0xc0 [ 972.637626] [<ffffffff815c643d>] __dev_close+0x2d/0x40 [ 972.637634] [<ffffffff815cc871>] __dev_change_flags+0xa1/0x180 [ 972.637642] [<ffffffff815cca08>] dev_change_flags+0x28/0x70 [ 972.637650] [<ffffffff815d9320>] do_setlink+0x3a0/0xa40 --- CUT --- The last kernel version with the issue was not reproduced was 3.5.40. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: linux-image-3.8.0-31-generic 3.8.0-31.46 ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8 Uname: Linux 3.8.0-31-generic x86_64 ApportVersion: 2.9.2-0ubuntu8.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sharath 2433 F.... pulseaudio Date: Tue Sep 17 13:09:22 2013 HibernationDevice: RESUME=UUID=a65c7147-fc92-4b66-856c-4cd6489c8e02 InstallationDate: Installed on 2013-01-21 (238 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: Dell Inc. XPS L421X MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-31-generic root=UUID=ccb29335-a20e-4b37-80e4-a4dcd91dec31 ro RelatedPackageVersions: linux-restricted-modules-3.8.0-31-generic N/A linux-backports-modules-3.8.0-31-generic N/A linux-firmware 1.106 SourcePackage: linux UpgradeStatus: Upgraded to raring on 2013-08-27 (20 days ago) dmi.bios.date: 08/27/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 09JP1V dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A09 dmi.modalias: dmi:bvnDellInc.:bvrA09:bd08/27/2012:svnDellInc.:pnXPSL421X:pvrA09:rvnDellInc.:rn09JP1V:rvrA00:cvnDellInc.:ct8:cvrA09: dmi.product.name: XPS L421X dmi.product.version: A09 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1226728/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
