Ubuntu

brightnes going dimng

Asked by prakash

help me please as i am facing unsual problem of my screen going dim and again comming back to normal i dont know why this is happening and this has been withnessed by me

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actionparsnip (andrew-woodhead666) said : 		#1

What is the output of:

sudo lshw -C display; lsb_release -a; uname -a; sudo dmidecode -t 1

Thanks

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prakash (getlife2k9) said : 		#2

$ sudo lshw -C display; lsb_release -a; uname -a; sudo dmidecode -t 1
[sudo] password for p:
  *-display
       description: VGA compatible controller
       product: Haswell-ULT Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 0b
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:43 memory:f7800000-f7bfffff memory:e0000000-efffffff ioport:f000(size=64)
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
Linux p-Inspiron-3542 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:42:33 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
 Manufacturer: Dell Inc.
 Product Name: Inspiron 3542
 Version: Not Specified
 Serial Number: 60MGB12
 UUID: 4C4C4544-0030-4D10-8047-B6C04F423132
 Wake-up Type: Power Switch
 SKU Number: 0651
 Family:

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actionparsnip (andrew-woodhead666) said : 		#3

Try the boot option:

acpi_backlight=vendor

May help

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prakash (getlife2k9) said : 		#4

still it popped up yesterday

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Launchpad Janitor (janitor) said : 		#5

This question was expired because it remained in the 'Needs information' state without activity for the last 15 days.