Hi, When i boot appears a msg Unsupported brightness interface, please contact ibm-acpi-devel@lists.sourceforge.net.
Bios Version: $ sudo dmidecode -s bios-version GNET66WW (2.14 ) Hardware name: LENOVO 20BG001KPG/20BG001KPG, BIOS GNET66WW (2.14 ) 07/02/2014 I check dmesg: $ dmesg | grep acpi [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x04] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x05] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x06] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x07] enabled) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) [ 0.263739] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 0.448872] acpi LNXIOBAY:00: ACPI dock station (docks/bays count: 1) [ 0.467774] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] [ 0.468069] acpi PNP0A08:00: _OSC: platform does not support [PCIeHotplug AER PCIeCapability] [ 0.468214] acpi PNP0A08:00: _OSC: not requesting control; platform does not support [PCIeCapability] [ 0.468220] acpi PNP0A08:00: _OSC: OS requested [PCIeHotplug PME AER PCIeCapability] [ 0.468224] acpi PNP0A08:00: _OSC: platform willing to grant [PME] [ 0.468228] acpi PNP0A08:00: _OSC failed (AE_SUPPORT); disabling ASPM [ 0.496532] acpiphp: Slot [1] registered [ 0.496773] acpiphp: Slot [1-1] registered [ 11.785602] thinkpad_acpi: ThinkPad ACPI Extras v0.25 [ 11.785603] thinkpad_acpi: http://ibm-acpi.sf.net/ [ 11.785603] thinkpad_acpi: ThinkPad BIOS GNET66WW (2.14 ), EC unknown [ 11.785604] thinkpad_acpi: Lenovo ThinkPad W540, model 20BG001KPG [ 11.786132] thinkpad_acpi: Unsupported brightness interface, please contact ibm-acpi-devel@lists.sourceforge.net [ 11.786147] thinkpad_acpi: radio switch found; radios are enabled [ 11.786236] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver [ 11.786236] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... [ 11.787332] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [ 11.787833] thinkpad_acpi: Console audio control enabled, mode: monitor (read only) [ 11.789180] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input8 [ 116.948610] Modules linked in: ctr ccm bbswitch(O) pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) binfmt_misc bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic hid_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev usbhid media hid x86_pkg_temp_thermal intel_powerclamp intel_rapl thinkpad_acpi snd_hda_intel ecb coretemp kvm_intel kvm btusb crc32_pclmul aesni_intel aes_i586 bluetooth snd_hda_controller 6lowpan_iphc snd_hda_codec xts snd_hwdep i915 lrw snd_pcm joydev snd_timer gf128mul nvram arc4 snd ablk_helper iTCO_wdt drm_kms_helper iwlmvm mac80211 cryptd iwlwifi cfg80211 iTCO_vendor_support drm evdev psmouse soundcore serio_raw shpchp i2c_algo_bit i2c_i801 i2c_core ac [ 583.952282] thinkpad_acpi: EC reports that Thermal Table has changed and $ lsmod | grep video uvcvideo 69805 0 videobuf2_vmalloc 12720 1 uvcvideo videobuf2_memops 12471 1 videobuf2_vmalloc videobuf2_core 39059 1 uvcvideo v4l2_common 12867 1 videobuf2_core videodev 107701 3 uvcvideo,v4l2_common,videobuf2_core media 17842 2 uvcvideo,videodev i2c_core 36838 7 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,v4l2_common,videodev video 17705 1 i915 usbcore 170994 6 btusb,uvcvideo,ehci_hcd,ehci_pci,usbhid,xhci_hcd thermal_sys 27122 5 video,intel_powerclamp,thermal,processor,x86_pkg_temp_thermal and cat /etc/pm/config.d/thinkpad_acpi SUSPEND_MODULES="thinkpad_acpi" I'm using Debian Jessie - Linux 3.16-3-686-pae #1 SMP Debian 3.16.5-1 (2014-10-10) i686 GNU/Linux Is there a fix for these? Regards, Rui
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