diff --git a/CHANGELOG.md b/CHANGELOG.md
index fff87d73..ef9658aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@
 * [ENHANCEMENT]
 * [BUGFIX]
 
+## 1.1.2 / 2021-03-05
+
+* [BUGFIX] Handle errors from disabled PSI subsystem #1983
+* [BUGFIX] Sanitize strings from /sys/class/power_supply #1984
+* [BUGFIX] Silence missing netclass errors #1986
+
 ## 1.1.1 / 2021-02-12
 
 * [BUGFIX] Fix ineffassign issue #1957
diff --git a/VERSION b/VERSION
index 524cb552..45a1b3f4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.1.1
+1.1.2
diff --git a/collector/fixtures/e2e-output.txt b/collector/fixtures/e2e-output.txt
index 468ee872..02175f41 100644
--- a/collector/fixtures/e2e-output.txt
+++ b/collector/fixtures/e2e-output.txt
@@ -2613,7 +2613,7 @@ node_power_supply_energy_watthour{power_supply="BAT0"} 36.58
 # HELP node_power_supply_info info of /sys/class/power_supply/<power_supply>.
 # TYPE node_power_supply_info gauge
 node_power_supply_info{power_supply="AC",type="Mains"} 1
-node_power_supply_info{capacity_level="Normal",manufacturer="LGC",model_name="LNV-45N1",power_supply="BAT0",serial_number="38109",status="Discharging",technology="Li-ion",type="Battery"} 1
+node_power_supply_info{capacity_level="Normal",manufacturer="LGC",model_name="LNV-45N1�",power_supply="BAT0",serial_number="38109",status="Discharging",technology="Li-ion",type="Battery"} 1
 # HELP node_power_supply_online online value of /sys/class/power_supply/<power_supply>.
 # TYPE node_power_supply_online gauge
 node_power_supply_online{power_supply="AC"} 0
diff --git a/collector/fixtures/sys.ttar b/collector/fixtures/sys.ttar
index 0392d205..9f072430 100644
--- a/collector/fixtures/sys.ttar
+++ b/collector/fixtures/sys.ttar
@@ -1298,7 +1298,7 @@ Mode: 444
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: sys/class/power_supply/BAT0/model_name
 Lines: 1
-LNV-45N1
+LNV-45N1ÀÀ
 Mode: 444
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: sys/class/power_supply/BAT0/power
diff --git a/collector/netclass_linux.go b/collector/netclass_linux.go
index 0fde2191..515f4d74 100644
--- a/collector/netclass_linux.go
+++ b/collector/netclass_linux.go
@@ -17,10 +17,13 @@
 package collector
 
 import (
+	"errors"
 	"fmt"
+	"os"
 	"regexp"
 
 	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 	"gopkg.in/alecthomas/kingpin.v2"
@@ -61,6 +64,10 @@ func NewNetClassCollector(logger log.Logger) (Collector, error) {
 func (c *netClassCollector) Update(ch chan<- prometheus.Metric) error {
 	netClass, err := c.getNetClassInfo()
 	if err != nil {
+		if errors.Is(err, os.ErrNotExist) || errors.Is(err, os.ErrPermission) {
+			level.Debug(c.logger).Log("msg", "Could not read netclass file", "err", err)
+			return ErrNoData
+		}
 		return fmt.Errorf("could not get net class info: %w", err)
 	}
 	for _, ifaceInfo := range netClass {
@@ -173,9 +180,8 @@ func pushMetric(ch chan<- prometheus.Metric, subsystem string, name string, valu
 
 func (c *netClassCollector) getNetClassInfo() (sysfs.NetClass, error) {
 	netClass, err := c.fs.NetClass()
-
 	if err != nil {
-		return netClass, fmt.Errorf("error obtaining net class info: %w", err)
+		return netClass, err
 	}
 
 	for device := range netClass {
diff --git a/collector/powersupplyclass.go b/collector/powersupplyclass.go
index adebf0e6..cd2028d0 100644
--- a/collector/powersupplyclass.go
+++ b/collector/powersupplyclass.go
@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"os"
 	"regexp"
+	"strings"
 
 	"github.com/go-kit/kit/log"
 	"github.com/prometheus/client_golang/prometheus"
@@ -153,7 +154,7 @@ func (c *powerSupplyClassCollector) Update(ch chan<- prometheus.Metric) error {
 		} {
 			if value != "" {
 				keys = append(keys, name)
-				values = append(values, value)
+				values = append(values, strings.ToValidUTF8(value, "�"))
 			}
 		}
 
diff --git a/collector/pressure_linux.go b/collector/pressure_linux.go
index bd660451..ad81ad73 100644
--- a/collector/pressure_linux.go
+++ b/collector/pressure_linux.go
@@ -19,6 +19,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"syscall"
 
 	"github.com/go-kit/kit/log"
 	"github.com/go-kit/kit/log/level"
@@ -94,6 +95,10 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
 				level.Debug(c.logger).Log("msg", "pressure information is unavailable, you need a Linux kernel >= 4.20 and/or CONFIG_PSI enabled for your kernel")
 				return ErrNoData
 			}
+			if errors.Is(err, syscall.ENOTSUP) {
+				level.Debug(c.logger).Log("msg", "pressure information is disabled, add psi=1 kernel command line to enable it")
+				return ErrNoData
+			}
 			return fmt.Errorf("failed to retrieve pressure stats: %w", err)
 		}
 		switch res {