Computer is locking up when coming out of suppend mode

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Hello all,

I need some help I am running 16.04 on a laptop (dell 5520), and when I close the lid the computer goes into suspend mode, and then when I open the lid back up again, the computer freezes up to where I have to reboot the computer by doing a power cycle. I have searched for an answer and I have not been able to find one. I am sorry that I don’t have more information as to what is going on but with the computer locking up, I’m not sure if there is a log that I can check after the power cycle.

Thanks

3

There are some debugging tips here.

https://wiki.ubuntu.com/UnderstandingSuspend

5

My advice is not to use suspend, either log out or shut down as suspend has caused headaches for a looooooong time in Ubuntu!. :smiley:

6

Suspend issues are typically caused by the kernel and some hardware seem to have problems. :confused: You’ll be able to find information in syslog and kern.log viewable in Log File Viewer (Applications → System Tools).

I found this bug report. Suspend seems to affect a fair few laptops. One the comments found success using a newer kernel (that isn’t released in 16.04 yet).

I’d suggest backing up your important files and giving this new kernel a try (this is for a 64-bit system):

cd /tmp
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6.2-yakkety/linux-headers-4.6.2-040602_4.6.2-040602.201606100516_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6.2-yakkety/linux-headers-4.6.2-040602-generic_4.6.2-040602.201606100516_amd64.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6.2-yakkety/linux-image-4.6.2-040602-generic_4.6.2-040602.201606100516_amd64.deb
sudo dpkg -i linux-headers-4.6*.deb linux-image-4.6*.deb
sudo reboot
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7

Thanks everyone for the help. I tried what was suggested, but none of them worked. I decided to rebuild my computer from EUFI with dual boot (windows and Linux), to legacy BIOS with only Ubuntu-Mate as the OS on the drive and now it is working just fine, and a little faster. I am not fully sure why changing the bios mode would make a difference, but it did. Thanks again for all the advice.

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