Sensors applet doesn't show HDD temperature

[Bakhelit]

Binary package hint: sensors-applet

Sensors applet doesn't show HDD temperature after reboot although hddtemp is running correctly. When user logs out and than back login temperature gets displayed properly again (other possibility is to remove and than add again sensors applet to the panel = applet's settings are lost). This behavior is same on all 3 computers I have reinstated to Ubuntu 10.04 recently (on Ubuntu 8.04 and 9.10 sensors applet was working properly).

[LeForgeron (jgrimbert)]

A small addition, at least for my system:

It seems to be a race condition between the applet/daemon/whatever and the start of gnome/system.
My configuration is with automatic login : it goes straight from Grub2 to splash screen (with 5 dots) and then open my two displays, loading 3 lines of "tableau de bord" (I'm missing the exact english term: the lines with the gnome menu and other applets) without any password prompt. My cpu are reported at full speed for a few seconds (it's ok, it's the default performance starting mode) then switch to OnDemand.

The sensors applet is displaying correctly the graphic card & environment (two sensors), but shows empty icons for the hard drives' sensors.

Now, in such state, when I close the session and login back, the sensor applet is back to normal, displaying all configurated sensors.

May be such description can help finding the issue.

[Alex Murray (alexmurray)]

Are you using the hddtemp or devkit-disks interface to monitor the temperature of your HDD? There is a known bug in the devkit-disks plugin which on first load will fail to show the temperature (which is as far as I can see the exact symptoms you are seeing) - this has been fixed upstream and will be in the next release of sensors-applet. However to my knowledge the hddtemp plugin should be fine.

[LeForgeron (jgrimbert)]

My synaptic reports hddtemp as installed, and no such thing as devkit-disks.
(Once again, that is on my system, I do not know about the original reporter)

Now, looking for devicekit-disks-doc, I found a transitional package for udisks-doc, and in fact udisks itself (not the doc) is also installed. Would you suggest to uninstall udisks ? (is that safe ?)

From the Preferences of the applet, the "Capteur" is from hddtemp (while the graphic part is from nvidia).

[Alex Murray (alexmurray)]

I don't understand what you mean by the comment "From the Preferences of the applet, the "Capteur" is from hddtemp (while the graphic part is from nvidia)." - Can you take a screenshot showing the list of sensors which you have enabled in the preferences dialog?

[Alex Murray (alexmurray)]

Okay I think your initial comment of a race condition is correct - what probably happens is sensors-applet starts up before hddtemp so it initially fails to find the sensor, and hence the hddtemp plugin is unloaded. Because of this even once the saved sensor data is loaded after intial startup, we fail to be able to get the temperature since we already unloaded the plugin. This has been fixed upstream - if you're able to compile from the upstream git repo you could test that to ensure the bug is fixed, otherwise when the next version is released it should contain the fix.

[Alex Murray (alexmurray)]

For a bit more info - this should have been fixed by the upstream commit 5c64d9d74985bd6ea9df1c968ea60d7c7355cde1 and hence would be included in the latest release 2.2.7 - if Ubuntu upgrade to this version then the bug should be fixed automatically with any luck.

[Alex Murray (alexmurray)]

FYI - Bug 616855 is In Progress to get the Ubuntu package upgrade to version 2.2.7

[Fabrice Coutadeur (fabricesp)]

2.2.7 has been packaged in Natty