zRAM broken on Raring?

Phill Whiteside PhillW at Ubuntu.com
Fri Sep 27 21:54:17 UTC 2013

Hi John

As for freezing we discovered that since kernel 3.10.6 zram is broken

If you are seeing issues on kernels before that, then it is a separate bug.
As for the report back from 'sudo parted -l' it is still there in the
new 3.11.0-9
kernel. This is a separate bug as to the 'crash and burn' issue we have
been seeing.

You really do need to file a bug against this, as all kernel bugs have
different causes and whilst 'we' may think it is the same issue, only when
the kernel team have the finer details can they make that call.

from a terminal run: ubuntu-bug linux

Then add as much information as you can (It will send a lot of basic
information that they need).



On 27 September 2013 22:28, John Hupp <lubuntu at prpcompany.com> wrote:

> On Raring, output from 'sudo parted -l' includes:
>     Error: /dev/zram0: unrecognised disk label
> And syslog shows a slew of errors:
>     Lubuntu kernel: Buffer I/O error on device zram0, logical block 128247
> Syslog also indicates that half of memory was given to zram to form its
> block device.
> Does this mean that half of memory is dedicated to something that isn't
> working?  And perhaps that machines will hang when swap is needed?
> I arrive at this line of questioning because I was testing an LTSP client
> using a Lubuntu LTSP server configured with 1 GB, and when I drop the
> client memory configuration to 256 MB, the *server* has hung on several
> occasions when I was starting or stopping Firefox on the client (though in
> one case this coincided with the startup of a SpiderOak backup operation).
>   I didn't think of the Magic SysRq keys at the time, and nothing else was
> responding, so I did hard shutdowns.
> I saw a post from Phill Whiteside recently concerning a rush of activity
> re a zram bug, but it seemed to be directed at Saucy.
> Are there solutions/workarounds?
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