Ubuntu 14.04 64-bit edition keeps crashing on Toshiba Laptop

[Rana Catesbiana]

Hello. I installed Ubuntu 14.04.2 64-bit edition on a brand new Toshiba c75d-b7215 laptop about 2 days ago. The laptop itself is dual-booting with Windows 8.1, and the Windows partition appears to look OK (haven't really spent that much time in it, though). I followed the Easy Linux Tips guide (https://sites.google.com/site/easylinuxtipsproject/) for optimizing Ubuntu.

However, my laptop keeps restarting itself quite randomly. For example, I can have about 10 tabs open on Chrome 64-bit edition, and LibreOffice open, and then my laptop will restart itself. I don't know whether or not this is a hardware issue or a Ubuntu issue. I would like to know soon, because I have about 10 days to decide whether or not I need to return this laptop and replace it with something else. Thank you.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-31-generic 3.16.0-31.43~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-31.43~14.04.1-generic 3.16.7-ckt5
Uname: Linux 3.16.0-31-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Mar 13 05:45:00 2015
InstallationDate: Installed on 2015-03-11 (1 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

[Pjotr12345 (computertip)]

More info is needed.... Please install inxi ("sudo apt-get install inxi").

Then make the terminal fullscreen, in order to avoid chopped lines.

Then execute this command: inxi -Fxz
(note that the F is a capital letter)

Press Enter.

Post the output in your answer.

[Rana Catesbiana (woods2007)]

This is the output for inxi -Fxz

System: Host: angela-Satellite-C75D-B Kernel: 3.16.0-31-generic x86_64 (64 bit, gcc: 4.8.2)
           Desktop: Gnome Distro: Ubuntu 14.04 trusty
Machine: System: TOSHIBA product: Satellite C75D-B version: PSCLEU-00Q003
           Mobo: TOSHIBA model: Portable PC version: MP Bios: Insyde version: 1.20 date: 06/13/2014
CPU: Quad core AMD A8-6410 APU with AMD Radeon R5 Graphics (-MCP-) cache: 8192 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 15969.4
           Clock Speeds: 1: 1000.00 MHz 2: 1000.00 MHz 3: 1600.00 MHz 4: 1000.00 MHz
Graphics: Card: Advanced Micro Devices [AMD/ATI] Mullins [Radeon APU A4-6000 with R2 Graphics] bus-ID: 00:01.0
           X.Org: 1.16.0 drivers: ati,radeon (unloaded: fbdev,vesa) Resolution: 1600x900@60.0hz
           GLX Renderer: Gallium 0.4 on AMD MULLINS GLX Version: 3.0 Mesa 10.3.2 Direct Rendering: Yes
Audio: Card-1: Advanced Micro Devices [AMD] FCH Azalia Controller driver: snd_hda_intel bus-ID: 00:14.2
           Card-2: Advanced Micro Devices [AMD/ATI] Device 9840 driver: snd_hda_intel bus-ID: 00:01.1
           Sound: Advanced Linux Sound Architecture ver: k3.16.0-31-generic
Network: Card-1: Realtek RTL8101E/RTL8102E PCI Express Fast Ethernet controller
           driver: r8169 ver: 2.3LK-NAPI port: 2000 bus-ID: 01:00.0
           IF: eth0 state: down mac: <filter>
           Card-2: Broadcom BCM43142 802.11b/g/n driver: wl bus-ID: 05:00.0
           IF: wlan0 state: up mac: <filter>
Drives: HDD Total Size: 1000.2GB (1.8% used) 1: id: /dev/sda model: TOSHIBA_MQ01ABD1 size: 1000.2GB
Partition: ID: / size: 11G used: 4.5G (44%) fs: ext4 ID: /home size: 761G used: 12G (2%) fs: ext4
           ID: swap-1 size: 16.00GB used: 0.00GB (0%) fs: swap
RAID: No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors: System Temperatures: cpu: 51.2C mobo: N/A gpu: 43.0
           Fan Speeds (in rpm): cpu: N/A
Info: Processes: 221 Uptime: 20:34 Memory: 1815.5/6874.6MB Runlevel: 2 Gcc sys: 4.8.2
           Client: Shell (bash 4.3.11) inxi: 1.9.17

[Pjotr12345 (computertip)]

Two things I'd try:

1. install the non-free closed proprietary driver for your video card. For that, use Software & Updates, tab Additional Drivers;

2. apply a BIOS update (check the support section of the Toshiba website for that).

[Rana Catesbiana (woods2007)]

Thanks for your response. With those solutions,:

1.) This keeps failing on me, so I filed an additional bug report about it (https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1432164), as encouraged by this guide (https://help.ubuntu.com/community/BinaryDriverHowto/AMD).

2.) I did this, and so far, so good for the light web browsing I'm doing. Hopefully it doesn't crash on me again.

[penalvch (penalvch)]

Rana Catesbiana, thank you for reporting this and helping make Ubuntu better. Could you please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1417450

[Rana Catesbiana (woods2007)]

Thanks for your help, however, I've already reformatted the laptop and returned it.

[penalvch (penalvch)]

Rana Catesbiana, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1431772/comments/7 regarding you no longer have the computer. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.