This bug is missing log files that will aid in diagnosing the problem. >From a terminal window please run:
apport-collect 1693544 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Tags added: trusty -- 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/1693544 Title: power loss with kernels newer than 4.1 in Ubuntu 16.04 Status in linux package in Ubuntu: Incomplete Bug description: I am using Ubuntu 16.04 with KDE Neon User Edition on a Lenovo T510. The screen blinks periodically. I describe it as a blink because it seems to switch off and right back on very quickly, as if I had just blinked by eyes. At seemingly random times, the screen will go black except for a tiny sliver of orange or yellow along the left edge, then the machine loses power. I have searched the logs and it seems that all logging just stops before the power outage without actually logging anything useful. This problem began shortly after I migrated from Kubuntu 14.04, so I installed a 3.13.0 kernel from the Ubuntu 14.04 repository and the problem went away. I then tried a 4.1.38 kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline. The 4.1 kernel is also problem free and the most recent kernel I can run without the power outages. However, all of these kernels have the power outage issue: Name Version Source ------------------------------------ ---------------------------- ----------------- linux-image-generic 4.4.0.78.84 16.04 repository linux-image-generic-hwe-16.04 4.8.0.52.23 16.04 repository linux-image-generic-hwe-16.04-edge 4.10.0.21.14 16.04 repository linux-image-4.11.0-041100rc8-generic 4.11.0-041100rc8.201704232131 kernel.ubuntu.com These kernels are fine: Name Version Source ------------------------------------ ---------------------------- ----------------- linux-image-3.13.0-24-generic 3.13.0-24.47 14.04 repository linux-image-4.1.38-040138-generic 4.1.38-040138.201701181632 kernel.ubuntu.com So, it seems the problem originated sometime between versions 4.1.38 and 4.4.0. Here is my lshw information: H/W path Device Class Description ======================================================= system 4313CTO /0 bus 4313CTO /0/0 memory 128KiB BIOS /0/6 processor Intel(R) Core(TM) i7 CPU M 620 @ 2.67GHz /0/6/a memory 32KiB L1 cache /0/6/b memory 256KiB L2 cache /0/6/c memory 4MiB L3 cache /0/2a memory 8GiB System Memory /0/2a/0 memory 4GiB SODIMM DDR3 Synchronous 1334 MHz (0.7 ns) /0/2a/1 memory 4GiB SODIMM DDR3 Synchronous 1334 MHz (0.7 ns) /0/100 bridge Core Processor DRAM Controller /0/100/2 display Core Processor Integrated Graphics Controller /0/100/16 communication 5 Series/3400 Series Chipset HECI Controller /0/100/19 enp0s25 network 82577LM Gigabit Network Connection /0/100/1a bus 5 Series/3400 Series Chipset USB2 Enhanced Host Controller /0/100/1a/1 usb1 bus EHCI Host Controller /0/100/1a/1/1 bus Integrated Rate Matching Hub /0/100/1a/1/1/4 communication Broadcom Bluetooth Device /0/100/1b multimedia 5 Series/3400 Series Chipset High Definition Audio /0/100/1c bridge 5 Series/3400 Series Chipset PCI Express Root Port 1 /0/100/1c.1 bridge 5 Series/3400 Series Chipset PCI Express Root Port 2 /0/100/1c.1/0 wlp3s0 network Centrino Ultimate-N 6300 /0/100/1c.3 bridge 5 Series/3400 Series Chipset PCI Express Root Port 4 /0/100/1c.4 bridge 5 Series/3400 Series Chipset PCI Express Root Port 5 /0/100/1c.4/0 generic MMC/SD Host Controller /0/100/1c.4/0.1 generic R5U2xx (R5U230 / R5U231 / R5U241) [Memory Stick Host Controller] /0/100/1c.4/0.3 bus R5C832 PCIe IEEE 1394 Controller /0/100/1d bus 5 Series/3400 Series Chipset USB2 Enhanced Host Controller /0/100/1d/1 usb2 bus EHCI Host Controller /0/100/1d/1/1 bus Integrated Rate Matching Hub /0/100/1e bridge 82801 Mobile PCI Bridge /0/100/1f bridge QM57 Chipset LPC Interface Controller /0/100/1f.2 storage 5 Series/3400 Series Chipset 6 port SATA AHCI Controller /0/100/1f.3 bus 5 Series/3400 Series Chipset SMBus Controller /0/100/1f.6 generic 5 Series/3400 Series Chipset Thermal Subsystem /0/101 bridge Core Processor QuickPath Architecture Generic Non-core Registers /0/102 bridge Core Processor QuickPath Architecture System Address Decoder /0/103 bridge Core Processor QPI Link 0 /0/104 bridge 1st Generation Core i3/5/7 Processor QPI Physical 0 /0/105 bridge 1st Generation Core i3/5/7 Processor Reserved /0/106 bridge 1st Generation Core i3/5/7 Processor Reserved /0/1 scsi0 storage /0/1/0.0.0 /dev/sda disk 500GB HITACHI HTS72505 /0/1/0.0.0/1 /dev/sda1 volume 1906MiB EXT4 volume /0/1/0.0.0/2 /dev/sda2 volume 463GiB Linux filesystem partition /0/2 scsi1 storage /0/2/0.0.0 /dev/cdrom disk DVDRAM GT33N /1 power 42T4801 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1693544/+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