[glutamatt]

Problem

In Processor preferences, Add Color Scale lists a frequency sensor once it is pinned to the panel (for example Max frequency). You can set breakpoints, but the panel never colors the value: colorsKeyForSensor() only accepts the percent format for the processor group, and frequencies use hertz.

Even with hertz accepted, the thresholds would compare the displayed number. That number changes unit with the value: 400 MHz gives 400, 4.5 GHz gives 4.5. So a "red under 1" rule would not work.

My use case: show the fastest core in red when the firmware cuts the power limit and the CPU falls to 400 MHz.

Change

• helpers/catalog.js: new sensorColorFormats field. These formats take a per-sensor scale only. The processor group gets sensorColorFormats: ['hertz'].
• The processor All sensors scale stays on usage. Without this, an existing 0 → green, 80 → red usage scale would color every frequency green. getUsageColor() gets a useGroupWide flag for that.
• values.js: frequency thresholds are in GHz, whatever unit the text shows.
• prefs.js: the scale title shows the unit (Frequency (fastest core) (GHz) colors). Palette titles are refreshed when sensor discovery ends, so the unit (and unavailable) is right even if the page was opened in the first 2 seconds.

GPU frequencies are not changed: the GPU group still colors percent only.

Testing

A GJS script that runs Values._legible() with fake settings:

fastest core 400 MHz               400.0 MHz  color: rgb(255, 0, 0);
fastest core 950 MHz (shown GHz)   950.0 MHz  color: rgb(255, 0, 0);
fastest core 4.5 GHz               4.5 GHz    color: rgb(0, 255, 0);
avg frequency, no own scale        2.0 GHz    (no color)
usage 90 %                         90%        color: rgb(255, 0, 0);
usage 10 %                         10%        color: rgb(0, 255, 0);
gpu frequency (not colorable)      1.0 GHz    (no color)

Scale: 0 → red, 1 → green on the fastest core, plus an All sensors usage scale 0 → green, 80 → red.

Not tested yet in a running shell or in the preferences window.