Comment 8 for bug 217455

In 1.5.1 upstream improved the parsing code for the $diskio*, $disk_protect and $ioscheduler args.
Even though the device name is still reported as optional in conky docs, if no device name is given to the $diskiograph argument conky will SIGSEGV. For the time being this can be solved by explicitly using a device name, for instance:

${diskiograph hda2}

Note that the device name must be a valid block device in /dev.

I'm reporting this upstream, as this is either an error in the docs, or conky should handle gracefully the case where no device name is specified with the diskiograph variable.