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My OS is Ubuntu 12.04 on my laptop Lenovo T400. I had been using it quite well until this week.

After suspending Ubuntu, whenever I lift the laptop lid (if the lid is closed), or press "Fn" key (if the lid is not closed), normally Ubuntu should wake up. But starting this week, I couldn't wake it up either way for twice after I carrie my lap in my backpack running to another place.

When the problem happens, the laptop light for battery is on, which is normal for suspended status (if it is turned off, there should be no light on). the laptop light for reading/writing from/to HDD is only about 1/4 of full lightness on, which I guess suggests it meets some difficulty of reading data from HDD for waking up?

Is this related to some recent update of Ubuntu 12.04? Or is it a signal of onset of failure of some hardware part? Or ...? Thanks!


Added:

As terdon suggested, I upload

  • the log files /var/log/pm-* before and after the problem happens here. (the files ending in .1 in their file names are those when I suspended Ubuntu, the files without .1 are those most recent log files. Note: after the problem happens, I restarted my Ubuntu, and successfully suspended and woke Ubuntu.

  • The output of my hardware info output by lshw is here

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  • This happens every now and then on each of the three laptops (including my T440) that I've used extensively. If it's only happened twice I wouldn't worry about it. If you're still worried, check /var/log/pm-* logs and see if there'[s anything relevant on thinkwiki.org. Also, suspend issues are very often linked to your graphics card so adding some details on your hardware might be a good idea. – terdon Mar 6 '14 at 1:37
  • Thanks! (1) which command to run for providing relevant details? (2) What to look for in /var/log/pm-*? – Tim Mar 6 '14 at 1:52
  • 1) Just list your hardware, use inxi -G if you have it or simply tell us your graphics card and driver. 2) I don't know what to look for, just any error messages really. – terdon Mar 6 '14 at 1:57
  • inxi -G command not found. – Tim Mar 6 '14 at 2:01
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    That's not usually what the light means as far as I know. What you describe sounds more and more like an X issue. Seriously though, this kind of rare problem is best ignored cause it'e rarely important and very hard to debug from a distance. And yes, I checked both files. In both the last line is resume suspend: success. – terdon Mar 6 '14 at 2:23
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I have a Thinkpad T410 and was plagued by this issue for years. I was using Fedora 14 but noticed that certain applications would tend to cause this issue if I left them open when I attempted to have the laptop suspend via closing the lid. I would make sure to close these applications once I recognized the pattern.

I'll also note that since upgrading to Fedora 19 I've not had this issue come up a single time, so you might have some luck by simply migrating up to Ubuntu 13.10.

The main applications that would cause this?

  • LibreOffice (any of the apps such as Writer, Calc, etc.)
  • SSH connections to remote systems
  • Virt-Manager

I've always just kept Chrome open and that never seemed to cause any issues.

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  • Thanks! I didn't have such issue until this week. I didn't have any rarely-used applications opened when the problem happened. One thing to note is that I had about 200 tabs opened in Firefox, which hadn't been problem for years before, and I don't think it might be a problem, since my RAM still had about 5+GB free space. – Tim Mar 6 '14 at 2:43
  • Wow, LibreOffice was indeed causing the same problem for me! Thanks for your detective work ;) Do you know why this is, and how to fix it properly instead of just closing LibreOffice before closing my laptop lid? – Doorknob Jun 23 '14 at 19:01
  • I've moved up to newer versions of LibreOffice and it seems to have lessened since upgrading to 4.x versions, I'm currently at 4.1.6.2. – slm Jun 23 '14 at 19:15

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