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[Guillermo Rodas <garethderioth@xxxxxxxxx>]

Sorry, I don't know how to post the tags:

kernel-fixed-upstream-v4.3-wily

I don't see anymore the Corrupted low memory. There is another way to
check this that just see the syslog?

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1507091

Title:
  Corrupted low memory on Ubuntu 15.04

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have had a lot of freezes on my laptop, and I'm trying to figure out
  what is the reason because just have like 6 months of bought.

  This is my laptop information:
  Lenovo G40-80
  7,7 GiB Memory
  Intel® Core™ i5-5200U CPU @ 2.20GHz × 4
  AMD Radeon HD 8500M
  Ubuntu 15.04 64-bit (Gnome version)

  I made a memtest86 and I got 3/4 good test (I took like 4 hours, so I
  just stopped it because I had to leave).

  I have this log that I think that was just before freezes (I have to
  do a Alt + SysReq + REISUB, for restart my laptop):

  Oct 17 00:26:51 lenovo kernel: [  120.925598] Corrupted low memory at ffff880000004fc0 (4fc0 phys) = ff232d2eff232d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925599] Corrupted low memory at ffff880000004fc8 (4fc8 phys) = ff232d2eff232d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925600] Corrupted low memory at ffff880000004fd0 (4fd0 phys) = ff232d2eff232d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925601] Corrupted low memory at ffff880000004fd8 (4fd8 phys) = ff232d2eff232d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925602] Corrupted low memory at ffff880000004fe0 (4fe0 phys) = ff232d2eff232d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925603] Corrupted low memory at ffff880000004fe8 (4fe8 phys) = ff232d2eff232d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925604] Corrupted low memory at ffff880000004ff0 (4ff0 phys) = ff242d2eff242d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925605] Corrupted low memory at ffff880000004ff8 (4ff8 phys) = ff242d2eff242d2e
  Oct 17 00:26:51 lenovo kernel: [  120.925611] ------------[ cut here ]------------
  Oct 17 00:26:51 lenovo kernel: [  120.925616] WARNING: CPU: 2 PID: 218 at /build/linux-qOmAV7/linux-3.19.0/arch/x86/kernel/check.c:140 check_for_bios_corruption+0xcb/0x120()
  Oct 17 00:26:51 lenovo kernel: [  120.925617] Memory corruption detected in low memory
  Oct 17 00:26:51 lenovo kernel: [  120.925619] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rfcomm bnep nls_iso8859_1 rtsx_usb_ms intel_rapl memstick iosf_mbi uvcvideo x86_pkg_temp_thermal intel_powerclamp coretemp videobuf2_vmalloc btusb kvm_intel videobuf2_memops bluetooth kvm arc4 videobuf2_core v4l2_common videodev rtl8723be snd_hda_codec_hdmi media crct10dif_pclmul crc32_pclmul i915_bpo btcoexist rtl8723_common rtl_pci ghash_clmulni_intel rtlwifi aesni_intel mac80211 aes_x86_64 lrw snd_hda_codec_conexant gf128mul intel_ips snd_hda_codec_generic glue_helper fglrx(POE) snd_hda_intel snd_hda_controller cfg80211 drm_kms_helper snd_hda_codec ablk_helper snd_hwdep drm snd_pcm cryptd snd_seq_midi amd_iommu_v2 snd_seq_midi_event snd_rawmidi i2c_algo_bit joydev serio_raw snd_seq ideapad_laptop snd_seq_device sparse_keymap mei_me snd_timer mei snd 8250_fintek soundcore shpchp wmi snd_soc_sst_acpi mac_hid lpc_ich video acpi_pad parport_pc ppdev lp parport autofs4 rtsx_usb_sdmmc rtsx_usb hid_generic usbhid hid psmouse ahci r8169 libahci mii
  Oct 17 00:26:51 lenovo kernel: [  120.925688] CPU: 2 PID: 218 Comm: kworker/2:2 Tainted: P           OE  3.19.0-30-generic #34-Ubuntu
  Oct 17 00:26:51 lenovo kernel: [  120.925690] Hardware name: LENOVO 80E4/Lenovo G40-80, BIOS B0CN69WW 06/20/2014
  Oct 17 00:26:51 lenovo kernel: [  120.925694] Workqueue: events check_corruption
  Oct 17 00:26:51 lenovo kernel: [  120.925696]  ffffffff81a92f40 ffff88009955bcf8 ffffffff817c4d5f 0000000000000007
  Oct 17 00:26:51 lenovo kernel: [  120.925699]  ffff88009955bd48 ffff88009955bd38 ffffffff81076a8a ffff880000004ff8
  Oct 17 00:26:51 lenovo kernel: [  120.925702]  0000000000000000 ffff880000010000 ffffffff81ede390 0000000000000001
  Oct 17 00:26:51 lenovo kernel: [  120.925706] Call Trace:
  Oct 17 00:26:51 lenovo kernel: [  120.925712]  [<ffffffff817c4d5f>] dump_stack+0x45/0x57
  Oct 17 00:26:51 lenovo kernel: [  120.925716]  [<ffffffff81076a8a>] warn_slowpath_common+0x8a/0xc0
  Oct 17 00:26:51 lenovo kernel: [  120.925719]  [<ffffffff81076b06>] warn_slowpath_fmt+0x46/0x50
  Oct 17 00:26:51 lenovo kernel: [  120.925724]  [<ffffffff810135e0>] ? __switch_to+0x150/0x5e0
  Oct 17 00:26:51 lenovo kernel: [  120.925728]  [<ffffffff8105d8bb>] check_for_bios_corruption+0xcb/0x120
  Oct 17 00:26:51 lenovo kernel: [  120.925731]  [<ffffffff8105d91e>] check_corruption+0xe/0x40
  Oct 17 00:26:51 lenovo kernel: [  120.925735]  [<ffffffff8108fd78>] process_one_work+0x158/0x430
  Oct 17 00:26:51 lenovo kernel: [  120.925738]  [<ffffffff810908bb>] worker_thread+0x5b/0x530
  Oct 17 00:26:51 lenovo kernel: [  120.925741]  [<ffffffff81090860>] ? rescuer_thread+0x3a0/0x3a0
  Oct 17 00:26:51 lenovo kernel: [  120.925745]  [<ffffffff81095959>] kthread+0xc9/0xe0
  Oct 17 00:26:51 lenovo kernel: [  120.925748]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
  Oct 17 00:26:51 lenovo kernel: [  120.925752]  [<ffffffff817cbdd8>] ret_from_fork+0x58/0x90
  Oct 17 00:26:51 lenovo kernel: [  120.925755]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
  Oct 17 00:26:51 lenovo kernel: [  120.925758] ---[ end trace 2d11d40c669ca9f1 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-30-generic 3.19.0-30.34
  ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
  Uname: Linux 3.19.0-30-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  garethderioth   2749 F.... pulseaudio
   /dev/snd/controlC1:  garethderioth   2749 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sat Oct 17 00:50:25 2015
  HibernationDevice: RESUME=UUID=f5e958f3-cb2a-4efb-9bf6-be3b31234061
  InstallationDate: Installed on 2015-07-16 (92 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: LENOVO 80E4
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=45fd5ced-f1b0-4701-9acc-13b7f3be3222 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-30-generic N/A
   linux-backports-modules-3.19.0-30-generic  N/A
   linux-firmware                             1.143.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/20/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: B0CN69WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: Lenovo G40-80
  dmi.board.vendor: LENOVO
  dmi.board.version: NO DPK
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo G40-80
  dmi.modalias: dmi:bvnLENOVO:bvrB0CN69WW:bd06/20/2014:svnLENOVO:pn80E4:pvrLenovoG40-80:rvnLENOVO:rnLenovoG40-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoG40-80:
  dmi.product.name: 80E4
  dmi.product.version: Lenovo G40-80
  dmi.sys.vendor: LENOVO

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