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poor battery life

I'm getting a poor battery life out of my dell laptop. like 1h on fedora, 3h on windows. I actually spent a lot energy to reduce power consumption and fan noise and it used to be good at some point, as good as windows I think but now it's poor again.

looking at the powertop, I have 30-35W power consumption. I turned of wired to save power. I have ~8-10W from wireless. 12-15W for the display backlight. Those two are already 20-25W! The next one is at 1.5W... and quickly I have apps.

My display backlight works. I can dim the screen. and it dims itself when idle. I had to force the intel one because at some point it broke, I could not change it anymore. Now with forced intel it works and I can see the power consumption reduces in powertop.

I tried setting power save for the wifi but the performance suffers hugely (like I get hundreds ob kb/s, not anymore mb/s).

Any way to reduce the display backlight power consumption? It's a full HD panel but I feel the number is really bad.

It's a lsmod in case it helps:

Module                  Size  Used by
cpufreq_stats          13344  0 
tun                    27153  2 
ccm                    17773  2 
ip6t_rpfilter          12546  1 
ip6t_REJECT            12939  2 
xt_conntrack           12760  9 
ebtable_nat            12807  0 
ebtable_broute         12731  0 
bridge                110862  1 ebtable_broute
stp                    12868  1 bridge
llc                    13941  2 stp,bridge
ebtable_filter         12827  0 
ebtables               30758  3 ebtable_broute,ebtable_nat,ebtable_filter
bnep                   19624  2 
ip6table_nat           13015  1 
nf_conntrack_ipv6      18738  6 
nf_defrag_ipv6         34712  1 nf_conntrack_ipv6
nf_nat_ipv6            13213  1 ip6table_nat
ip6table_mangle        12700  1 
ip6table_security      12710  1 
ip6table_raw           12683  1 
ip6table_filter        12815  1 
ip6_tables             26809  5 ip6table_filter,ip6table_mangle,ip6table_security,ip6table_nat,ip6table_raw
iptable_nat            13011  1 
nf_conntrack_ipv4      14656  5 
nf_defrag_ipv4         12702  1 nf_conntrack_ipv4
nf_nat_ipv4            13199  1 iptable_nat
nf_nat                 25112  4 nf_nat_ipv4,nf_nat_ipv6,ip6table_nat,iptable_nat
nf_conntrack           99420  8 nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,ip6table_nat,iptable_nat,nf_conntrack_ipv4,nf_conntrack_ipv6
iptable_mangle         12695  1 
iptable_security       12705  1 
iptable_raw            12678  1 
fuse                   91401  5 
dell_laptop            18168  0 
dcdbas                 14875  1 dell_laptop
arc4                   12608  2 
iwldvm                240929  0 
mac80211              608109  1 iwldvm
x86_pkg_temp_thermal    14205  0 
coretemp               13441  0 
kvm_intel             143285  0 
kvm                   452397  1 kvm_intel
dell_wmi               12681  0 
serio_raw              13434  0 
sparse_keymap          13584  1 dell_wmi
videobuf2_vmalloc      13163  0 
videobuf2_memops       13161  1 videobuf2_vmalloc
videobuf2_core         43332  0 
videodev              147125  1 videobuf2_core
media                  20840  1 videodev
i2c_i801               18145  0 
mei_me                 18515  0 
iwlwifi               121268  1 iwldvm
crct10dif_pclmul       14307  0 
crc32_pclmul           13133  0 
crc32c_intel           22094  0 
mei                    81536  1 mei_me
ghash_clmulni_intel    13230  0 
iTCO_wdt               13480  0 
iTCO_vendor_support    13419  1 iTCO_wdt
microcode              44576  0 
mii                    13527  0 
lpc_ich                21093  0 
mfd_core               13182  1 lpc_ich
snd_hda_codec_hdmi     47536  1 
snd_hda_codec_conexant    22962  1 
snd_hda_codec_generic    67662  1 snd_hda_codec_conexant
bluetooth             429257  5 bnep
snd_hda_intel          30379  4 
snd_hda_controller     30139  1 snd_hda_intel
snd_hda_codec         131137  5 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17650  1 snd_hda_codec
snd_seq                62266  0 
snd_seq_device         14136  1 snd_seq
snd_pcm               104333  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
cfg80211              493377  3 iwlwifi,mac80211,iwldvm
snd_timer              28778  2 snd_pcm,snd_seq
snd                    75905  18 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
rfkill                 21979  7 cfg80211,bluetooth,dell_laptop
soundcore              14491  2 snd,snd_hda_codec
shpchp                 37047  0 
wmi                    18820  1 dell_wmi
binfmt_misc            17431  1 
i915                  837920  3 
i2c_algo_bit           13257  1 i915
drm_kms_helper         52500  1 i915
drm                   289961  5 i915,drm_kms_helper
i2c_core               55486  6 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
video                  19637  1 i915
vboxnetadp             25670  0 
vboxnetflt             27613  0 
vboxdrv               389038  2 vboxnetadp,vboxnetflt
click to hide/show revision 2
No.2 Revision

poor battery life

This is a duplicate question and has been answered already.

Find the answer here: battery draining less than one hour


I'm getting a poor battery life out of my dell laptop. like 1h on fedora, 3h on windows. I actually spent a lot energy to reduce power consumption and fan noise and it used to be good at some point, as good as windows I think but now it's poor again.

looking at the powertop, I have 30-35W power consumption. I turned of wired to save power. I have ~8-10W from wireless. 12-15W for the display backlight. Those two are already 20-25W! The next one is at 1.5W... and quickly I have apps.

My display backlight works. I can dim the screen. and it dims itself when idle. I had to force the intel one because at some point it broke, I could not change it anymore. Now with forced intel it works and I can see the power consumption reduces in powertop.

I tried setting power save for the wifi but the performance suffers hugely (like I get hundreds ob kb/s, not anymore mb/s).

Any way to reduce the display backlight power consumption? It's a full HD panel but I feel the number is really bad.

It's a lsmod in case it helps:

Module                  Size  Used by
cpufreq_stats          13344  0 
tun                    27153  2 
ccm                    17773  2 
ip6t_rpfilter          12546  1 
ip6t_REJECT            12939  2 
xt_conntrack           12760  9 
ebtable_nat            12807  0 
ebtable_broute         12731  0 
bridge                110862  1 ebtable_broute
stp                    12868  1 bridge
llc                    13941  2 stp,bridge
ebtable_filter         12827  0 
ebtables               30758  3 ebtable_broute,ebtable_nat,ebtable_filter
bnep                   19624  2 
ip6table_nat           13015  1 
nf_conntrack_ipv6      18738  6 
nf_defrag_ipv6         34712  1 nf_conntrack_ipv6
nf_nat_ipv6            13213  1 ip6table_nat
ip6table_mangle        12700  1 
ip6table_security      12710  1 
ip6table_raw           12683  1 
ip6table_filter        12815  1 
ip6_tables             26809  5 ip6table_filter,ip6table_mangle,ip6table_security,ip6table_nat,ip6table_raw
iptable_nat            13011  1 
nf_conntrack_ipv4      14656  5 
nf_defrag_ipv4         12702  1 nf_conntrack_ipv4
nf_nat_ipv4            13199  1 iptable_nat
nf_nat                 25112  4 nf_nat_ipv4,nf_nat_ipv6,ip6table_nat,iptable_nat
nf_conntrack           99420  8 nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,ip6table_nat,iptable_nat,nf_conntrack_ipv4,nf_conntrack_ipv6
iptable_mangle         12695  1 
iptable_security       12705  1 
iptable_raw            12678  1 
fuse                   91401  5 
dell_laptop            18168  0 
dcdbas                 14875  1 dell_laptop
arc4                   12608  2 
iwldvm                240929  0 
mac80211              608109  1 iwldvm
x86_pkg_temp_thermal    14205  0 
coretemp               13441  0 
kvm_intel             143285  0 
kvm                   452397  1 kvm_intel
dell_wmi               12681  0 
serio_raw              13434  0 
sparse_keymap          13584  1 dell_wmi
videobuf2_vmalloc      13163  0 
videobuf2_memops       13161  1 videobuf2_vmalloc
videobuf2_core         43332  0 
videodev              147125  1 videobuf2_core
media                  20840  1 videodev
i2c_i801               18145  0 
mei_me                 18515  0 
iwlwifi               121268  1 iwldvm
crct10dif_pclmul       14307  0 
crc32_pclmul           13133  0 
crc32c_intel           22094  0 
mei                    81536  1 mei_me
ghash_clmulni_intel    13230  0 
iTCO_wdt               13480  0 
iTCO_vendor_support    13419  1 iTCO_wdt
microcode              44576  0 
mii                    13527  0 
lpc_ich                21093  0 
mfd_core               13182  1 lpc_ich
snd_hda_codec_hdmi     47536  1 
snd_hda_codec_conexant    22962  1 
snd_hda_codec_generic    67662  1 snd_hda_codec_conexant
bluetooth             429257  5 bnep
snd_hda_intel          30379  4 
snd_hda_controller     30139  1 snd_hda_intel
snd_hda_codec         131137  5 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17650  1 snd_hda_codec
snd_seq                62266  0 
snd_seq_device         14136  1 snd_seq
snd_pcm               104333  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
cfg80211              493377  3 iwlwifi,mac80211,iwldvm
snd_timer              28778  2 snd_pcm,snd_seq
snd                    75905  18 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
rfkill                 21979  7 cfg80211,bluetooth,dell_laptop
soundcore              14491  2 snd,snd_hda_codec
shpchp                 37047  0 
wmi                    18820  1 dell_wmi
binfmt_misc            17431  1 
i915                  837920  3 
i2c_algo_bit           13257  1 i915
drm_kms_helper         52500  1 i915
drm                   289961  5 i915,drm_kms_helper
i2c_core               55486  6 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
video                  19637  1 i915
vboxnetadp             25670  0 
vboxnetflt             27613  0 
vboxdrv               389038  2 vboxnetadp,vboxnetflt

poor battery life

This is a duplicate question and has been answered already.

Find the answer here: battery draining less than one hour


I'm getting a poor battery life out of my dell laptop. like 1h on fedora, 3h on windows. I actually spent a lot energy to reduce power consumption and fan noise and it used to be good at some point, as good as windows I think but now it's poor again.

looking at the powertop, I have 30-35W power consumption. I turned of wired to save power. I have ~8-10W from wireless. 12-15W for the display backlight. Those two are already 20-25W! The next one is at 1.5W... and quickly I have apps.

My display backlight works. I can dim the screen. and it dims itself when idle. I had to force the intel one because at some point it broke, I could not change it anymore. Now with forced intel it works and I can see the power consumption reduces in powertop.

I tried setting power save for the wifi but the performance suffers hugely (like I get hundreds ob kb/s, not anymore mb/s).

Any way to reduce the display backlight power consumption? It's a full HD panel but I feel the number is really bad.

It's a lsmod in case it helps:

Module                  Size  Used by
cpufreq_stats          13344  0 
tun                    27153  2 
ccm                    17773  2 
ip6t_rpfilter          12546  1 
ip6t_REJECT            12939  2 
xt_conntrack           12760  9 
ebtable_nat            12807  0 
ebtable_broute         12731  0 
bridge                110862  1 ebtable_broute
stp                    12868  1 bridge
llc                    13941  2 stp,bridge
ebtable_filter         12827  0 
ebtables               30758  3 ebtable_broute,ebtable_nat,ebtable_filter
bnep                   19624  2 
ip6table_nat           13015  1 
nf_conntrack_ipv6      18738  6 
nf_defrag_ipv6         34712  1 nf_conntrack_ipv6
nf_nat_ipv6            13213  1 ip6table_nat
ip6table_mangle        12700  1 
ip6table_security      12710  1 
ip6table_raw           12683  1 
ip6table_filter        12815  1 
ip6_tables             26809  5 ip6table_filter,ip6table_mangle,ip6table_security,ip6table_nat,ip6table_raw
iptable_nat            13011  1 
nf_conntrack_ipv4      14656  5 
nf_defrag_ipv4         12702  1 nf_conntrack_ipv4
nf_nat_ipv4            13199  1 iptable_nat
nf_nat                 25112  4 nf_nat_ipv4,nf_nat_ipv6,ip6table_nat,iptable_nat
nf_conntrack           99420  8 nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,ip6table_nat,iptable_nat,nf_conntrack_ipv4,nf_conntrack_ipv6
iptable_mangle         12695  1 
iptable_security       12705  1 
iptable_raw            12678  1 
fuse                   91401  5 
dell_laptop            18168  0 
dcdbas                 14875  1 dell_laptop
arc4                   12608  2 
iwldvm                240929  0 
mac80211              608109  1 iwldvm
x86_pkg_temp_thermal    14205  0 
coretemp               13441  0 
kvm_intel             143285  0 
kvm                   452397  1 kvm_intel
dell_wmi               12681  0 
serio_raw              13434  0 
sparse_keymap          13584  1 dell_wmi
videobuf2_vmalloc      13163  0 
videobuf2_memops       13161  1 videobuf2_vmalloc
videobuf2_core         43332  0 
videodev              147125  1 videobuf2_core
media                  20840  1 videodev
i2c_i801               18145  0 
mei_me                 18515  0 
iwlwifi               121268  1 iwldvm
crct10dif_pclmul       14307  0 
crc32_pclmul           13133  0 
crc32c_intel           22094  0 
mei                    81536  1 mei_me
ghash_clmulni_intel    13230  0 
iTCO_wdt               13480  0 
iTCO_vendor_support    13419  1 iTCO_wdt
microcode              44576  0 
mii                    13527  0 
lpc_ich                21093  0 
mfd_core               13182  1 lpc_ich
snd_hda_codec_hdmi     47536  1 
snd_hda_codec_conexant    22962  1 
snd_hda_codec_generic    67662  1 snd_hda_codec_conexant
bluetooth             429257  5 bnep
snd_hda_intel          30379  4 
snd_hda_controller     30139  1 snd_hda_intel
snd_hda_codec         131137  5 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17650  1 snd_hda_codec
snd_seq                62266  0 
snd_seq_device         14136  1 snd_seq
snd_pcm               104333  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
cfg80211              493377  3 iwlwifi,mac80211,iwldvm
snd_timer              28778  2 snd_pcm,snd_seq
snd                    75905  18 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
rfkill                 21979  7 cfg80211,bluetooth,dell_laptop
soundcore              14491  2 snd,snd_hda_codec
shpchp                 37047  0 
wmi                    18820  1 dell_wmi
binfmt_misc            17431  1 
i915                  837920  3 
i2c_algo_bit           13257  1 i915
drm_kms_helper         52500  1 i915
drm                   289961  5 i915,drm_kms_helper
i2c_core               55486  6 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
video                  19637  1 i915
vboxnetadp             25670  0 
vboxnetflt             27613  0 
vboxdrv               389038  2 vboxnetadp,vboxnetflt

poor battery life

This is a duplicate question and has been answered already.

Find the answer here: battery draining less than one hour


I'm getting a poor battery life out of my dell laptop. like 1h on fedora, 3h on windows. I actually spent a lot energy to reduce power consumption and fan noise and it used to be good at some point, as good as windows I think but now it's poor again.

looking at the powertop, I have 30-35W power consumption. I turned of wired to save power. I have ~8-10W from wireless. 12-15W for the display backlight. Those two are already 20-25W! The next one is at 1.5W... and quickly I have apps.

My display backlight works. I can dim the screen. and it dims itself when idle. I had to force the intel one because at some point it broke, I could not change it anymore. Now with forced intel it works and I can see the power consumption reduces in powertop.

I tried setting power save for the wifi but the performance suffers hugely (like I get hundreds ob kb/s, not anymore mb/s).

Any way to reduce the display backlight power consumption? It's a full HD panel but I feel the number is really bad.

It's a lsmod in case it helps:

Module                  Size  Used by
cpufreq_stats          13344  0 
tun                    27153  2 
ccm                    17773  2 
ip6t_rpfilter          12546  1 
ip6t_REJECT            12939  2 
xt_conntrack           12760  9 
ebtable_nat            12807  0 
ebtable_broute         12731  0 
bridge                110862  1 ebtable_broute
stp                    12868  1 bridge
llc                    13941  2 stp,bridge
ebtable_filter         12827  0 
ebtables               30758  3 ebtable_broute,ebtable_nat,ebtable_filter
bnep                   19624  2 
ip6table_nat           13015  1 
nf_conntrack_ipv6      18738  6 
nf_defrag_ipv6         34712  1 nf_conntrack_ipv6
nf_nat_ipv6            13213  1 ip6table_nat
ip6table_mangle        12700  1 
ip6table_security      12710  1 
ip6table_raw           12683  1 
ip6table_filter        12815  1 
ip6_tables             26809  5 ip6table_filter,ip6table_mangle,ip6table_security,ip6table_nat,ip6table_raw
iptable_nat            13011  1 
nf_conntrack_ipv4      14656  5 
nf_defrag_ipv4         12702  1 nf_conntrack_ipv4
nf_nat_ipv4            13199  1 iptable_nat
nf_nat                 25112  4 nf_nat_ipv4,nf_nat_ipv6,ip6table_nat,iptable_nat
nf_conntrack           99420  8 nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,ip6table_nat,iptable_nat,nf_conntrack_ipv4,nf_conntrack_ipv6
iptable_mangle         12695  1 
iptable_security       12705  1 
iptable_raw            12678  1 
fuse                   91401  5 
dell_laptop            18168  0 
dcdbas                 14875  1 dell_laptop
arc4                   12608  2 
iwldvm                240929  0 
mac80211              608109  1 iwldvm
x86_pkg_temp_thermal    14205  0 
coretemp               13441  0 
kvm_intel             143285  0 
kvm                   452397  1 kvm_intel
dell_wmi               12681  0 
serio_raw              13434  0 
sparse_keymap          13584  1 dell_wmi
videobuf2_vmalloc      13163  0 
videobuf2_memops       13161  1 videobuf2_vmalloc
videobuf2_core         43332  0 
videodev              147125  1 videobuf2_core
media                  20840  1 videodev
i2c_i801               18145  0 
mei_me                 18515  0 
iwlwifi               121268  1 iwldvm
crct10dif_pclmul       14307  0 
crc32_pclmul           13133  0 
crc32c_intel           22094  0 
mei                    81536  1 mei_me
ghash_clmulni_intel    13230  0 
iTCO_wdt               13480  0 
iTCO_vendor_support    13419  1 iTCO_wdt
microcode              44576  0 
mii                    13527  0 
lpc_ich                21093  0 
mfd_core               13182  1 lpc_ich
snd_hda_codec_hdmi     47536  1 
snd_hda_codec_conexant    22962  1 
snd_hda_codec_generic    67662  1 snd_hda_codec_conexant
bluetooth             429257  5 bnep
snd_hda_intel          30379  4 
snd_hda_controller     30139  1 snd_hda_intel
snd_hda_codec         131137  5 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17650  1 snd_hda_codec
snd_seq                62266  0 
snd_seq_device         14136  1 snd_seq
snd_pcm               104333  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
cfg80211              493377  3 iwlwifi,mac80211,iwldvm
snd_timer              28778  2 snd_pcm,snd_seq
snd                    75905  18 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
rfkill                 21979  7 cfg80211,bluetooth,dell_laptop
soundcore              14491  2 snd,snd_hda_codec
shpchp                 37047  0 
wmi                    18820  1 dell_wmi
binfmt_misc            17431  1 
i915                  837920  3 
i2c_algo_bit           13257  1 i915
drm_kms_helper         52500  1 i915
drm                   289961  5 i915,drm_kms_helper
i2c_core               55486  6 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
video                  19637  1 i915
vboxnetadp             25670  0 
vboxnetflt             27613  0 
vboxdrv               389038  2 vboxnetadp,vboxnetflt