我在我的电脑上运行的是 ubuntu 14.04华硕 K55VD。
亮度低的功能键响应非常晚：大约 30-45 秒后亮度降低。
但其他功能（亮度向上，体积+ -)键工作正常。唯一的问题是亮度低的钥匙
有什么解决办法吗？
更多信息 ：
我的内核版本：
3.19.0-49-generic
附言：
猫/ proc /命令
BOOT_IMAGE=/boot/vmlinuz-3.19.0-49-generic root=UUID=bf489b0f-7029-4916-b2cb-5794abbc315d ro quiet splash intel_pstate=enable vt.handoff=7
请参阅lspci-k | grep -iA2 VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
Subsystem: ASUSTeK Computer Inc. Device 1457
Kernel driver in use: i915
--
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [GeForce 610M] (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 1457
03:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
对于 /sys/class/backlight/* 中的接口；执行 echo -e "\n $interface"；cat $interface/{brightness,max_brightness,actual_brightness}；完成
/sys/class/backlight/intel_backlight
3771
4882
3771
修改
Module Size Used by
nvram 16384 0
msr 16384 0
pci_stub 16384 1
vboxpci 24576 0
vboxnetadp 28672 0
vboxnetflt 28672 0
vboxdrv 417792 3 vboxnetadp,vboxnetflt,vboxpci
ctr 16384 1
ccm 20480 1
bnep 20480 2
rfcomm 69632 4
binfmt_misc 20480 1
ath3k 20480 0
uvcvideo 90112 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_core 53248 1 uvcvideo
v4l2_common 16384 1 videobuf2_core
videodev 159744 3 uvcvideo,v4l2_common,videobuf2_core
btusb 40960 0
bluetooth 491520 12 bnep,ath3k,btusb,rfcomm
media 24576 2 uvcvideo,videodev
ip6t_REJECT 16384 1
nf_reject_ipv6 16384 1 ip6t_REJECT
nf_log_ipv6 16384 4
xt_hl 16384 6
ip6t_rt 16384 3
nf_conntrack_ipv6 20480 10
nf_defrag_ipv6 36864 1 nf_conntrack_ipv6
ipt_REJECT 16384 1
nf_reject_ipv4 16384 1 ipt_REJECT
nf_log_ipv4 16384 4
nf_log_common 16384 2 nf_log_ipv4,nf_log_ipv6
xt_LOG 16384 8
xt_limit 16384 11
xt_tcpudp 16384 18
xt_addrtype 16384 4
nf_conntrack_ipv4 16384 10
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
xt_conntrack 16384 20
ip6table_filter 16384 1
ip6_tables 28672 1 ip6table_filter
nf_conntrack_netbios_ns 16384 0
nf_conntrack_broadcast 16384 1 nf_conntrack_netbios_ns
nf_nat_ftp 16384 0
nf_nat 24576 1 nf_nat_ftp
nf_conntrack_ftp 20480 1 nf_nat_ftp
nf_conntrack 106496 8 nf_nat_ftp,nf_conntrack_netbios_ns,nf_nat,xt_conntrack,nf_conntrack_broadcast,nf_conntrack_ftp,nf_conntrack_ipv4,nf_conntrack_ipv6
iptable_filter 16384 1
ip_tables 28672 1 iptable_filter
x_tables 36864 13 ip6table_filter,xt_hl,ip_tables,xt_tcpudp,xt_limit,xt_conntrack,xt_LOG,iptable_filter,ip6t_rt,ipt_REJECT,ip6_tables,xt_addrtype,ip6t_REJECT
snd_hda_codec_hdmi 53248 1
snd_hda_codec_realtek 86016 1
snd_hda_codec_generic 69632 1 snd_hda_codec_realtek
intel_rapl 20480 0
iosf_mbi 16384 1 intel_rapl
x86_pkg_temp_thermal 16384 0
intel_powerclamp 20480 0
coretemp 16384 0
kvm_intel 151552 0
asus_nb_wmi 24576 0
asus_wmi 24576 1 asus_nb_wmi
sparse_keymap 16384 1 asus_wmi
snd_hda_intel 36864 4 snd_hda_codec_hdmi
kvm 479232 1 kvm_intel
snd_hda_controller 32768 1 snd_hda_intel
snd_hda_codec 143360 5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep 20480 1 snd_hda_codec
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
cryptd 20480 0
joydev 20480 0
arc4 16384 2
serio_raw 16384 0
snd_pcm 106496 4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
ath9k 147456 0
ath9k_common 32768 1 ath9k
snd_seq_midi 16384 0
ath9k_hw 458752 2 ath9k_common,ath9k
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
ath 32768 3 ath9k_common,ath9k,ath9k_hw
mac80211 712704 1 ath9k
rtsx_pci_ms 20480 0
snd_seq 65536 2 snd_seq_midi_event,snd_seq_midi
memstick 20480 1 rtsx_pci_ms
nouveau 1368064 0
lpc_ich 24576 0
i915 1048576 4
cfg80211 524288 4 ath,ath9k_common,ath9k,mac80211
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_pcm,snd_seq
snd 86016 17 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
mxm_wmi 16384 1 nouveau
mei_me 20480 0
ttm 94208 1 nouveau
soundcore 16384 2 snd,snd_hda_codec
mei 90112 1 mei_me
drm_kms_helper 126976 2 i915,nouveau
drm 344064 8 ttm,i915,drm_kms_helper,nouveau
shpchp 40960 0
i2c_algo_bit 16384 2 i915,nouveau
wmi 20480 3 mxm_wmi,nouveau,asus_wmi
video 20480 3 i915,nouveau,asus_wmi
mac_hid 16384 0
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 45056 3 lp,ppdev,parport_pc
hid_generic 16384 0
usbhid 53248 0
hid 110592 2 hid_generic,usbhid
rtsx_pci_sdmmc 24576 0
psmouse 118784 0
ahci 36864 3
libahci 32768 1 ahci
r8169 81920 0
rtsx_pci 49152 2 rtsx_pci_ms,rtsx_pci_sdmmc
mii
pastebinit /var/log/Xorg.0.log