Laptop freezes after suspend

Question

Recently I've experienced a problem with my laptop. It suspended perfectly after closing the lid, and everything was ok after opening it.

The issue is that now the laptop freezes when I suspend it (or close the lid). The screen goes to black (but bright black, it is not off) and the laptop remains on. I've tried changing the drivers to the NVIDIA one (like here) but nothing new, and I also tried to changesudo gedit /etc/default/grub, but the same.

I would also like to point out that I've been recently installing a couple of VMs in VirtualBox so that I had to enable the virtualization and the booting in insecure mode, just in case it has something to do with my problem.

And also, a couple of times I could read a message kind of Freezing of tasks failed after 20.01 seconds (3 tasks refusing to freeze, wq_busy=0) after suspend.

I would apreciate your help.

Technical details:

• Lenovo U31
• Intel Core i5 5200U CPU 2.20 GHz
• Linux 4.10.0-32-generic

UPDATE: Some output.

jorge@jorge-Lenovo-U31-70:~$ ls -alt /var/crash/
total 2656
drwxrwsrwt  2 root     whoopsie    4096 ago 16 18:14 .
-rwxrwxrwx  1 root     whoopsie       0 ago 16 18:14 .lock
-rw-------  1 whoopsie whoopsie       0 ago 12 18:16 _usr_lib_virtualbox_VirtualBox.0.uploaded
-rw-r--r--  1 root     whoopsie       0 ago 12 18:16 _usr_lib_virtualbox_VirtualBox.0.upload
-rw-r-----  1 root     whoopsie 2660216 ago 12 18:15 _usr_lib_virtualbox_VirtualBox.0.crash
-rw-------  1 whoopsie whoopsie       0 ago 12 14:52 _usr_sbin_update-apt-xapian-index.0.uploaded
-rw-r--r--  1 root     whoopsie       0 ago 12 14:52 _usr_sbin_update-apt-xapian-index.0.upload
-rw-r-----  1 root     whoopsie   45613 ago 12 14:52 _usr_sbin_update-apt-xapian-index.0.crash
drwxr-xr-x 13 root     root        4096 ago 12 14:40 ..


jorge@jorge-Lenovo-U31-70:~$ free -h
              total        used        free      shared  buff/cache   available
Memoria:        7,7G        660M        6,5G        137M        590M        6,7G
Swap:          7,9G          0B        7,9G


jorge@jorge-Lenovo-U31-70:~$ swapon -s
Filename                Type        Size    Used    Priority
/dev/sda3                               partition   8299516 0   -1


 jorge@jorge-Lenovo-U31-70:~$ sudo blkid           
/dev/sda1: UUID="8BFC-B5D5" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="afdaf7bb-755c-46d8-80d2-247bec22b9c3"
/dev/sda2: UUID="99c6efde-2951-471d-954e-9250b95605d6" TYPE="ext4" PARTUUID="24463a23-fe3d-4904-b687-ee2a0bed4968"
/dev/sda3: UUID="85f4ca7a-9e8f-42c1-ab7d-765e18fae6a4" TYPE="swap" PARTUUID="39c2bbcd-4868-477b-8c31-3032c613c201"


jorge@jorge-Lenovo-U31-70:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda2 during installation
UUID=99c6efde-2951-471d-954e-9250b95605d6 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
UUID=8BFC-B5D5  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/sda3 during installation
UUID=85f4ca7a-9e8f-42c1-ab7d-765e18fae6a4 none            swap    sw              0       0

Today ago 16 I have experienced the freeze lots of times. When freezing, no text is shown in the screen if I press ESC, but if I press the power buttom then the elementary symbol appears in screen (as in the booting), and if I press ESC there, then I obtain some text:

UPDATE 2: After another freeze (and turning the laptop off with the power button), I start the laptop and I get a error message related to the suspend:

Answer 1

In terminal...

• cat /etc/initramfs-tools/conf.d/resume # if exists, show me the contents

• dpkg -l intel-microcode | grep ii # see if this is installed, if not:

  • sudo dpkg -i intel-microcode

• sudo cp /etc/fstab /etc/fstab.bak # backup fstab file

• gksudo gedit /etc/fstab # edit fstab

change this line:

UUID=8BFC-B5D5  /boot/efi       vfat    umask=0077      0       1

to this:

UUID=8BFC-B5D5  /boot/efi       vfat    defaults      0       1

Then reboot. Retest suspend.

Go to https://www.memtest86.com/ and download the free memory diagnostic and run at least one full pass.

Update #1:

• start the Disks application
• select the disk in the left pane
• click on the "hamburger" icon
• select SMART Data & Tests
• review the data
• run the tests

Update #2:

• /etc/initramfs-tools/conf.d/resume looks fine
• we installed intel-microcode

In terminal...

sudo apt-get update
sudo apt-get install intel-microcode

Update #3:

• go to https://www.memtest86.org
• download the free memory diagnostic
• run at least one complete pass

Update #4:

• check your motherboard BIOS version and go to the manufacturer's web site and make sure it's the latest version for your make/model #. If not, update it asap.

Update #5:

• we found that the suspend problem didn't occur when we disconnected the wireless and used a wired connection
• we uninstalled the broadcom wl kernel module that was tainting the kernel
• we'll also replace the r8169 driver

In terminal...

sudo apt-get purge bcmwl-kernel-source

pending sudo apt-get install r8168-dkms

pending BIOS update