https://bugs.kde.org/show_bug.cgi?id=438031
Bug ID: 438031
Summary: Ksysguard assumes static folder structure for
lmsensors and it breaks the functionality
Product: ksysguard
Version: 5.21.5
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: ksysguard
Assignee: ksysguard-b...@kde.org
Reporter: ville.aa...@gmail.com
CC: plasma-b...@kde.org
Target Milestone: ---
KSysGuard assumes static names for lmsensors sensor file name and folder
structure. This is not a safe assumption since a driver providing sensors might
not have the same exact name on every boot.
I have an USB connected sensor device (Corsair Commander Pro using the
corsaircpro driver), and on every boot, it get's populated to a different part
in the USB tree. (such as: corsaircpro-hid-3-6, corsaircpro-hid-3-8,
corsaircpro-hid-3-4 etc.)
I'm not sure how to fix this easily. Perhaps using some kind of wild card in
the name entry? We could parse /sys/class/hwmon/hwmon?/name, but that should be
an option. This approach would fix this for me on current setup, since all my
devices are named differently, but will break it for others, as there can be
many hwmon? with the same name (see an old, now closed bug report:
https://bugs.kde.org/show_bug.cgi?id=107941). Perhaps there could be an option
which way the sensor device is dentified - the lmsensors short name (only) or
the full devid path (the current way)?
Note: on my system the device is in a different part of the usb tree, despite
the said device has been plugged in all the time.
STEPS TO REPRODUCE
1. Have a device which doesn't get the same name every boot (as output by the
sensors command or identified by ksysguard - lmsensors/[NAME]/sensor)
2. Add sensors from this device in KSysguard
3. Reboot and restart KSysGuard
OBSERVED RESULT
KSyaGuard does not find previously assigned sensors in it's graphs (despite
lmsensors having picked them up), if the device name has changed from previous
boot. Instead KSysGuard reports an error for the sensor.
EXPECTED RESULT
KSysGuard should find all sensors previously assigned to a graph
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION:
This kind of problems mighty become more common, as H/W sensors become more
commonplace in many different kind of devices. Around a decade ago, I had 1-2
sensor providing devices - now I have 7! Perhaps some kind of rethinking /
overhaul is needed for the sensor finding?
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