Hello,
I have a problem with screen brightness on an Acer Aspire ES1-411,
I can change the brightness value with wsconsctl and it doesn't return an error,
but the brightness is still high like at 100%.

$ wsconsctl display.brightness
display.brightness=100.00%

$ wsconsctl display.brightness=0
display.brightness -> 0.00%

$ wsconsctl display.brightness
display.brightness=0.00%

Does anyone have the same problem on a similar platform ?
It is because I have a lot of not configured hardware ?
Thanks
Jix


dmesg:
OpenBSD 6.0-beta (RAMDISK_CD) #1954: Thu Jun  2 08:43:13 MDT 2016
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_CD
RTC BIOS diagnostic error 80<clock_battery>
real mem = 4154654720 (3962MB)
avail mem = 4026888192 (3840MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.7 @ 0x7812b000 (22 entries)
bios0: vendor Insyde Corp. version "V1.08" date 12/10/2014
bios0: Acer Aspire ES1-411
acpi0 at bios0: rev 2
acpi0: tables DSDT FACP UEFI HPET LPIT APIC MCFG SSDT SSDT SSDT UEFI SSDT CSRT SSDT FPDT BGRT
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Celeron(R) CPU N2940 @ 1.83GHz, 1833.67 MHz
cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,RDRAND,NXE,LONG,LAHF,3DNOWP,PERF,ITSC,SMEP,ERMS,SENSOR,ARAT
cpu0: 1MB 64b/line 16-way L2 cache
cpu0: apic clock running at 83MHz
cpu0: mwait min=64, max=64, C-substates=0.2.0.0.0.0.3.3, IBE
cpu at mainbus0: not configured
cpu at mainbus0: not configured
cpu at mainbus0: not configured
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 87 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (RP01)
acpiprt2 at acpi0: bus -1 (RP02)
acpiprt3 at acpi0: bus 2 (RP03)
acpiprt4 at acpi0: bus 3 (RP04)
acpiec0 at acpi0
acpicpu at acpi0 not configured
acpipwrres at acpi0 not configured
acpitz at acpi0 not configured
"INT3396" at acpi0 not configured
"10250934" at acpi0 not configured
"ETD050A" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"PNP0C0C" at acpi0 not configured
"PNP0C0E" at acpi0 not configured
bytgpio0 at acpi0: GPO0 uid 1 addr 0xfed0c000/0x1000 irq 49, 102 pins
bytgpio1 at acpi0: GPO1 uid 2 addr 0xfed0d000/0x1000 irq 48, 28 pins
bytgpio2 at acpi0: GPO2 uid 3 addr 0xfed0e000/0x1000 irq 50, 44 pins
"INTL9C60" at acpi0 not configured
dwiic0 at acpi0: I2C1 addr 0x90903000/0x1000 irq 32
iic0 at dwiic0
"INT33BD" at acpi0 not configured
"ACPI0003" at acpi0 not configured
"PNP0C0A" at acpi0 not configured
"PNP0C0D" at acpi0 not configured
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Bay Trail Host" rev 0x0e
"Intel Bay Trail Video" rev 0x0e at pci0 dev 2 function 0 not configured
ahci0 at pci0 dev 19 function 0 "Intel Bay Trail AHCI" rev 0x0e: msi, AHCI 1.3
ahci0: port 0: 3.0Gb/s
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: <ATA, KINGSTON SHFS37A, 605A> SCSI3 0/direct fixed naa.50026b7259078e40
sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin
xhci0 at pci0 dev 20 function 0 "Intel Bay Trail xHCI" rev 0x0e: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 "Intel xHCI root hub" rev 3.00/1.00 addr 1
"Intel Bay Trail TXE" rev 0x0e at pci0 dev 26 function 0 not configured
"Intel Bay Trail HD Audio" rev 0x0e at pci0 dev 27 function 0 not configured
ppb0 at pci0 dev 28 function 0 "Intel Bay Trail I2C" rev 0x0e: msi
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 2 "Intel Bay Trail PCIE" rev 0x0e: msi
pci2 at ppb1 bus 2
athn0 at pci2 dev 0 function 0 "Atheros AR9285" rev 0x01: apic 2 int 18
athn0: AR9285 rev 2 (1T1R), ROM rev 14, address e0:b9:a5:47:f2:0f
ppb2 at pci0 dev 28 function 3 "Intel Bay Trail PCIE" rev 0x0e: msi
pci3 at ppb2 bus 3
rtsx0 at pci3 dev 0 function 0 "Realtek RTL8411B Card Reader" rev 0x01: msi
sdmmc0 at rtsx0: 4-bit
re0 at pci3 dev 0 function 1 "Realtek 8168" rev 0x12: RTL8411B (0x5c80), msi, address 2c:60:0c:6d:96:be
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
"Intel Bay Trail LPC" rev 0x0e at pci0 dev 31 function 0 not configured
"Intel Bay Trail SMBus" rev 0x0e at pci0 dev 31 function 3 not configured
isa0 at mainbus0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
efifb0 at mainbus0
wsdisplay0 at efifb0 mux 1: console (std, vt100 emulation), using wskbd0
"vendor 0x13d3 product 0x3304" rev 1.10/0.01 addr 2 at uhub0 port 3 not configured "NC2141102N5060731ELM21 VGA Webcam" rev 2.00/3.21 addr 3 at uhub0 port 4 not configured
softraid0 at root
scsibus1 at softraid0: 256 targets
root on rd0a swap on rd0b dump on rd0b
syncing disks... done
rebooting...
OpenBSD 6.0-beta (GENERIC.MP) #2165: Thu Jun  2 08:37:59 MDT 2016
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
RTC BIOS diagnostic error 80<clock_battery>
real mem = 4154654720 (3962MB)
avail mem = 4024111104 (3837MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.7 @ 0x7812b000 (22 entries)
bios0: vendor Insyde Corp. version "V1.08" date 12/10/2014
bios0: Acer Aspire ES1-411
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP UEFI HPET LPIT APIC MCFG SSDT SSDT SSDT UEFI SSDT CSRT SSDT FPDT BGRT acpi0: wakeup devices XHC1(S3) PXSX(S4) RP01(S4) PXSX(S4) RP02(S4) PXSX(S4) RP03(S4) PXSX(S4) RP04(S4) EHC1(S3)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 14318179 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Celeron(R) CPU N2940 @ 1.83GHz, 1833.67 MHz
cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,RDRAND,NXE,LONG,LAHF,3DNOWP,PERF,ITSC,SMEP,ERMS,SENSOR,ARAT
cpu0: 1MB 64b/line 16-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 83MHz
cpu0: mwait min=64, max=64, C-substates=0.2.0.0.0.0.3.3, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Celeron(R) CPU N2940 @ 1.83GHz, 1833.34 MHz
cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,RDRAND,NXE,LONG,LAHF,3DNOWP,PERF,ITSC,SMEP,ERMS,SENSOR,ARAT
cpu1: 1MB 64b/line 16-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) Celeron(R) CPU N2940 @ 1.83GHz, 1833.34 MHz
cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,RDRAND,NXE,LONG,LAHF,3DNOWP,PERF,ITSC,SMEP,ERMS,SENSOR,ARAT
cpu2: 1MB 64b/line 16-way L2 cache
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) Celeron(R) CPU N2940 @ 1.83GHz, 1833.34 MHz
cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,RDRAND,NXE,LONG,LAHF,3DNOWP,PERF,ITSC,SMEP,ERMS,SENSOR,ARAT
cpu3: 1MB 64b/line 16-way L2 cache
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 87 pins
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-63
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (RP01)
acpiprt2 at acpi0: bus -1 (RP02)
acpiprt3 at acpi0: bus 2 (RP03)
acpiprt4 at acpi0: bus 3 (RP04)
acpiec0 at acpi0
acpicpu0 at acpi0: C3(10@1500 mwait.1@0x52), C2(10@500 mwait.1@0x51), C1(1000@1 mwait.1), PSS acpicpu1 at acpi0: C3(10@1500 mwait.1@0x52), C2(10@500 mwait.1@0x51), C1(1000@1 mwait.1), PSS acpicpu2 at acpi0: C3(10@1500 mwait.1@0x52), C2(10@500 mwait.1@0x51), C1(1000@1 mwait.1), PSS acpicpu3 at acpi0: C3(10@1500 mwait.1@0x52), C2(10@500 mwait.1@0x51), C1(1000@1 mwait.1), PSS
acpipwrres0 at acpi0: USBC, resource for OTG1, EHC1
acpitz0 at acpi0: critical temperature is 105 degC
"INT3396" at acpi0 not configured
"10250934" at acpi0 not configured
"ETD050A" at acpi0 not configured
"PNP0C14" at acpi0 not configured
acpibtn0 at acpi0: PWRB
acpibtn1 at acpi0: SLPB
bytgpio0 at acpi0: GPO0 uid 1 addr 0xfed0c000/0x1000 irq 49, 102 pins
bytgpio1 at acpi0: GPO1 uid 2 addr 0xfed0d000/0x1000 irq 48, 28 pins
bytgpio2 at acpi0: GPO2 uid 3 addr 0xfed0e000/0x1000 irq 50, 44 pins
"INTL9C60" at acpi0 not configured
dwiic0 at acpi0: I2C1 addr 0x90903000/0x1000 irq 32
iic0 at dwiic0
"INT33BD" at acpi0 not configured
acpiac0 at acpi0: AC unit offline
acpibat0 at acpi0: BAT1 model "AL12A32" serial 9219 type LION oem "SANYO"
acpibtn2 at acpi0: LID_
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 1833 MHz: speeds: 1827, 1826, 1660, 1494, 1328, 1162, 996, 830, 664, 498 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Bay Trail Host" rev 0x0e
inteldrm0 at pci0 dev 2 function 0 "Intel Bay Trail Video" rev 0x0e
drm0 at inteldrm0
inteldrm0: msi
inteldrm0: 1366x768
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
ahci0 at pci0 dev 19 function 0 "Intel Bay Trail AHCI" rev 0x0e: msi, AHCI 1.3
ahci0: port 0: 3.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, KINGSTON SHFS37A, 605A> SCSI3 0/direct fixed naa.50026b7259078e40
sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin
xhci0 at pci0 dev 20 function 0 "Intel Bay Trail xHCI" rev 0x0e: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 "Intel xHCI root hub" rev 3.00/1.00 addr 1
"Intel Bay Trail TXE" rev 0x0e at pci0 dev 26 function 0 not configured
azalia0 at pci0 dev 27 function 0 "Intel Bay Trail HD Audio" rev 0x0e: msi
azalia0: codecs: Realtek/0x0283, Intel/0x2882, using Realtek/0x0283
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 "Intel Bay Trail I2C" rev 0x0e: msi
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 2 "Intel Bay Trail PCIE" rev 0x0e: msi
pci2 at ppb1 bus 2
athn0 at pci2 dev 0 function 0 "Atheros AR9285" rev 0x01: apic 2 int 18
athn0: AR9285 rev 2 (1T1R), ROM rev 14, address e0:b9:a5:47:f2:0f
ppb2 at pci0 dev 28 function 3 "Intel Bay Trail PCIE" rev 0x0e: msi
pci3 at ppb2 bus 3
rtsx0 at pci3 dev 0 function 0 "Realtek RTL8411B Card Reader" rev 0x01: msi
sdmmc0 at rtsx0: 4-bit
re0 at pci3 dev 0 function 1 "Realtek 8168" rev 0x12: RTL8411B (0x5c80), msi, address 2c:60:0c:6d:96:be
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
pcib0 at pci0 dev 31 function 0 "Intel Bay Trail LPC" rev 0x0e
ichiic0 at pci0 dev 31 function 3 "Intel Bay Trail SMBus" rev 0x0e: apic 2 int 18
iic1 at ichiic0
spdmem0 at iic1 addr 0x50: 4GB DDR3 SDRAM PC3-12800 SO-DIMM
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
efifb at mainbus0 not configured
ugen0 at uhub0 port 3 "AsureWave product 0x3304" rev 1.10/0.01 addr 2
uvideo0 at uhub0 port 4 configuration 1 interface 0 "NC2141102N5060731ELM21 VGA Webcam" rev 2.00/3.21 addr 3
video0 at uvideo0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (778bc8b855f3a293.a) swap on sd0b dump on sd0b
uhidev0 at uhub0 port 1 configuration 1 interface 0 "bq Aquaris X5" rev 2.00/ff.ff addr 4
uhidev0: iclass 3/0
uhid0 at uhidev0: input=2, output=2, feature=0
uhid0 detached
uhidev0 detached
ugen1 at uhub0 port 1 "Android Android" rev 2.00/ff.ff addr 4
ugen1 detached
ugen1 at uhub0 port 1 "Android Android" rev 2.00/ff.ff addr 4
uhidev0 at uhub0 port 2 configuration 1 interface 0 "Logitech USB Receiver" rev 2.00/24.03 addr 5
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
uhidev1 at uhub0 port 2 configuration 1 interface 1 "Logitech USB Receiver" rev 2.00/24.03 addr 5
uhidev1: iclass 3/1, 8 report ids
ums0 at uhidev1 reportid 2: 16 buttons, Z and W dir
wsmouse1 at ums0 mux 0
uhid0 at uhidev1 reportid 3: input=4, output=0, feature=0
uhid1 at uhidev1 reportid 4: input=1, output=0, feature=0
uhid2 at uhidev1 reportid 8: input=1, output=0, feature=0
uhidev2 at uhub0 port 2 configuration 1 interface 2 "Logitech USB Receiver" rev 2.00/24.03 addr 5
uhidev2: iclass 3/0, 33 report ids
uhid3 at uhidev2 reportid 16: input=6, output=6, feature=0
uhid4 at uhidev2 reportid 17: input=19, output=19, feature=0
uhid5 at uhidev2 reportid 32: input=14, output=14, feature=0
uhid6 at uhidev2 reportid 33: input=31, output=31, feature=0

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