Sometime ago i asked here about zram - and got good advice. On one
laptop i have it running and all is fine. But on this unfortunate Sony
i have problems:

When i tried to install zram as on the other machine i discovered that
zram module is not enabled at all:

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zgrep ZRAM /proc/config.gz
gzip: /proc/config.gz: No such file or directory
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The result is the same with the 3.16 kernel (which is my old kernel)
and with the 4.6 kernel. How that? Und what can i do to enable that
module?