DAMN! Rebooted and working (?) Sorry for the extensive comments

Using kernel 4.9.33, refreshing graphics CPUfreq & temp shows this error message:

Failed to execute command ‘export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; omv-mkgraph 2>&1’ with exit code ‘1’: ERROR: rrdc_flush (/var/lib/rrdcached/db//localhost/cpufreq/cpufreq-0.rrd) failed with status -1.

Error #0:
exception ‘OMV\ExecException’ with message ‘Failed to execute command ‘export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; omv-mkgraph 2>&1’ with exit code ‘1’: ERROR: rrdc_flush (/var/lib/rrdcached/db//localhost/cpufreq/cpufreq-0.rrd) failed with status -1.’ in /usr/share/php/openmediavault/system/process.inc:175
Stack trace:
#0 /usr/share/openmediavault/engined/rpc/rrd.inc(54): OMV\System\Process->execute(Array)
#1 /usr/share/php/openmediavault/rpc/serviceabstract.inc(528): OMVRpcServiceRrd->{closure}(‘/tmp/bgstatusCr…’, ‘/tmp/bgoutputVs…’)
#2 /usr/share/openmediavault/engined/rpc/rrd.inc(56): OMV\Rpc\ServiceAbstract->execBgProc(Object(Closure))
#3 [internal function]: OMVRpcServiceRrd->generate(NULL, Array)
#4 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#5 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod(‘generate’, NULL, Array)
#6 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call(‘Rrd’, ‘generate’, NULL, Array, 1)
#7 {main}

Hmm it should just work. I’m using it as well with omv 3 on 2 Odroids.

Working like a charm. How can I put in OMV3 the graphs about cpufreq & cputemp? The scripts from OMV2 shows broken graphs.

Bad news: My XU4 died this morning. I’ll try to get a new one as soon as I can, then I will install the image of the link. Thanks anyway.