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My copy of Ubuntu 14.04 LTS just won't stop crashing when viewing YouTube videos but the worst part is that the problem is inconsistent because I can sometimes go days without any problems and other times I can't watch a single video without the system crashing every time :(. Here are my lspci outputs:

00:00.0 Host bridge: Intel Corporation Device 2280 (rev 21)
00:02.0 VGA compatible controller: Intel Corporation Device 22b1 (rev 21)
00:0b.0 Signal processing controller: Intel Corporation Device 22dc (rev 21)
00:13.0 SATA controller: Intel Corporation Device 22a3 (rev 21)
00:14.0 USB controller: Intel Corporation Device 22b5 (rev 21)
00:1a.0 Encryption controller: Intel Corporation Device 2298 (rev 21)
00:1b.0 Audio device: Intel Corporation Device 2284 (rev 21)
00:1c.0 PCI bridge: Intel Corporation Device 22c8 (rev 21)
00:1f.0 ISA bridge: Intel Corporation Device 229c (rev 21)
00:1f.3 SMBus: Intel Corporation Device 2292 (rev 21)
01:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
00:02.0 VGA compatible controller: Intel Corporation Device 22b1 (rev 21)
Subsystem: Dell Device 06ac
Kernel driver in use: i915

I have an Intel® Celeron(R) CPU N3050 @ 1.60GHz × 2 and an Intel® HD Graphics (Cherryview).

I've got all the latest updates installed for my system and can browse the Net without issue but Youtube is fast becoming a no-go area :(.

UPDATE:

Paste bin link for Xorg.0.log.old: http://paste.ubuntu.com/20292670/

Terminator
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  • What does /var/log/Xorg.0.log says just after crash? (it's probably Xorg.0.log.old if graphic restarted). But anyway, I'm not sure if anyone has a better suggestion, but I think you'd need to install latest mesa drivers (e.g. from a PPA), and a kernel-4.6 (there was a rework of intel kernel driver if I correctly remember); then, if it won't fix the problem, report a bug. – Hi-Angel Jul 20 '16 at 17:32
  • I've found the logs but how do I post them? – Terminator Jul 20 '16 at 18:22
  • Edit your question and add the content of the file. Alternatively, copy the content of the file here: http://paste.ubuntu.com/ Then, add the resulting link to your question. –  Jul 20 '16 at 19:16
  • I've updated my question with a link to the requested log file :). – Terminator Jul 20 '16 at 20:35
  • @Terminator I meant the log after the crash, but not just a log. And — you can judge that by time in the braces — if the graphic was restarted, it would be the file Xorg.0.log.old, because the Xorg.0.log would then be used by the new XServer, i.e. not the crashed one. – Hi-Angel Jul 21 '16 at 06:50
  • EDIT: I've just found out how to read the .old file and have updated the Pastebin link with the new contents :). – Terminator Jul 21 '16 at 10:04
  • @Terminator hmm, strange, I didn't see crash errors in the log, looks like XServer just exited. May be it's Unity crashed, and for whatever reason didn't start (most WMs, e.g. kwin, e20, etc. does restart if crash happened to them, so that session wouldn't lost)? I'd advice to post ~/.xsession-errors just after the crash, supposedly, Unity would log problems there. And try a different DE, e.g. KDE, or Enlightement (err, no, better don't, though it is great, but Ubuntu has an ancient one in the repository), or Gnome. And please, use @ with name in replies, so that people'd be notified. – Hi-Angel Jul 21 '16 at 18:42
  • @Hi-Angel. What are "DE" and "Unity"? I'm very new to Linux so these phrases mean nothing to me :(. – Terminator Jul 21 '16 at 19:21
  • @Terminator Desktop Environment is a set of graphical apps providing a consistent user experience. Unity.. Well, Unity is both the name of a DE, and also the name of its Window Manager. Don't be misled though: you almost always can use apps from different DEs (exceptions, probably, some specific configuration apps). You can have different DEs on your system, and switch between them from a login manager. See this for how to install KDE. – Hi-Angel Jul 21 '16 at 19:30
  • Ah, sorry, you're probably confused also why would I advice installing "a set of utilities" when the supposed problem is a Unity WM. Well, I don't know Unity DE very well, I didn't like it, and I can't advice you to just change WM because not sure what problems with Unity could it cause. So I advised installing another DE to test whether the problem is in Unity, I think it would be the simplest way. – Hi-Angel Jul 21 '16 at 19:54

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