fix: cpu info

internal/modules/system/info.go

@@ -159,9 +159,18 @@ func cpuInfo() CPUInfo {
 	c := CPUInfo{Model: cpuModel(string(data)), LogicalCPUs: runtime.NumCPU()}
 	c.MinMHz, c.MaxMHz, c.CurrentMHz = cpuFreqMHz("/sys/devices/system/cpu")
 	// ponytail: cpufreq sysfs is absent on many VMs and stock Ubuntu server
-	// kernels; fall back to /proc/cpuinfo "cpu MHz" so CurrentMHz isn't 0.
+	// kernels; fall back to /proc/cpuinfo "cpu MHz" — VMs have a fixed clock,
-	if c.CurrentMHz == 0 {
+	// so min == max == cur is the honest answer.
-		c.CurrentMHz = cpuinfoMaxMHz(string(data))
+	if mhz := cpuinfoMaxMHz(string(data)); mhz > 0 {
+		if c.CurrentMHz == 0 {
+			c.CurrentMHz = mhz
+		}
+		if c.MaxMHz == 0 {
+			c.MaxMHz = mhz
+		}
+		if c.MinMHz == 0 {
+			c.MinMHz = mhz
+		}
 	}
 	return c
 }