/dev/zram0 - How to Remove It?

[mapes12]

Here's fdisk -l in the GUI.

[Cheesemill]

It looks like the zram kernel module is being loaded. What is the output of...

lsmod | grep zram
zramconfig /dev/zram0 --stats

[mapes12]

Looks like the second command didn't do anything.

mark@mark-ubu-laptop:~$ lsmod | grep zram
zram 18642 1

mark@mark-ubu-laptop:~$ zramconfig /dev/zram0 --stats
zramconfig: command not found

[Cheesemill]

You could try installing zramconfig and then using it to turn off the feature.

sudo apt-get update
sudo apt-get install zramconfig
sudo swapoff /dev/zram0
sudo umount /dev/zram0
sudo zramconfig /dev/zram0 --reset

[mapes12]

Update went fine then I got:-

mark@mark-ubu-laptop:~$ sudo apt-get install zramconfig
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package zramconfig

Which repo is it in?

[Cheesemill]

Sorry, that should be zram-config.

[mapes12]

mark@mark-ubu-laptop:~$ sudo apt-get install zram-config
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed
zram-config
0 upgraded, 1 newly installed, 0 to remove and 8 not upgraded.
Need to get 3,078 B of archives.
After this operation, 42.0 kB of additional disk space will be used.
Get:1 http://gb.archive.ubuntu.com/ubuntu/ precise/universe zram-config all 0.1 [3,078 B]
Fetched 3,078 B in 0s (23.8 kB/s)
Selecting previously unselected package zram-config.
(Reading database ... 228552 files and directories currently installed.)
Unpacking zram-config (from .../zram-config_0.1_all.deb) ...
Processing triggers for ureadahead ...
ureadahead will be reprofiled on next reboot
Setting up zram-config (0.1) ...
start: Job failed to start
invoke-rc.d: initscript zram-config, action "start" failed.
dpkg: error processing zram-config (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
zram-config
E: Sub-process /usr/bin/dpkg returned an error code (1)

Then Apport kicked in and fired off an error report.

The above installation error is a known Bug Report in Launchpad and is under investigation. Can't see that there is much more I can do now.

[tgalati4]

How did /dev/zram0 get installed in the first place? Is it part of a Virtual Machine installation?

[mapes12]

How did /dev/zram0 get installed in the first place? Is it part of a Virtual Machine installation?

I've had Parallels Workstation and Parallels Transporter installed on this machine for ages but never set up a OS within them. As far as I can recall zram has only just started to appear on my system. I'm thinking that perhaps a Kernel upgrade that came through the other week as part of the regular Updates may have had something in it that detected the VM installation capability and initiated the zram configuaration at boot up. I'm guessing here.The plot thickens. If you look at my earlier screenshots you will see zram0 at 1.6GB. It's now morphed itself into zram0 and zram1 both at 779MB each. See attached updated screenshot.

[tgalati4]

I did a fresh install of 12.10 on my laptop without any VM's and I don't have a zram0. So I think you are correct, it's associated with Parallels. Perhaps there is a Parallels removal tool if you are not using it?