backlight brightness setting issue

[Anonymous]

Hello,
I noticed with the setting of the backlight brightness of the screen on my laptop (menu/applications/preferences), if I completely decrease the brightness to have a black screen, it is impossible for me to reactivate the backlight, my keyboard no longer works and therefore, I am forced to restart after turning off my laptop brutally. How can this be remedied?

[Anonymous]

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The backlight setting utility has been widely used, successfully, across years.
Maybe your specific hardware has a quirk which somehow makes it incompatible with the utility.
Would-be helpers are left guessing blindly, unless you post your hardware specs.

[Anonymous]

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Oh well, I didn’t think it would come from my hardware specs.

$ inxi -Fxz
System:
  Host: antix1 Kernel: 4.9.160-antix.1-amd64-smp x86_64 bits: 64 
  compiler: gcc v: 6.3.0 Desktop: IceWM 1.4.2 
  Distro: antiX-17.4.1_x64-base Helen Keller 28 March 2019 
  base: Debian GNU/Linux 9 (stretch) 
Machine:
  Type: Laptop System: SAMSUNG product: R520/R522/R620 v: N/A 
  serial: <filter> 
  Mobo: SAMSUNG model: R520/R522/R620 serial: <filter> BIOS: Phoenix 
  v: 03LL.M015.20090522.Jay date: 05/22/2009 
Battery:
  ID-1: BAT1 charge: 33.3 Wh condition: 33.3/44.4 Wh (75%) 
  model: SAMSUNG Electronics status: Full 
CPU:
  Topology: Dual Core model: Intel Core2 Duo T6400 bits: 64 type: MCP 
  arch: Penryn rev: A L2 cache: 2048 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 ssse3 bogomips: 7978 
  Speed: 1600 MHz min/max: 1200/2000 MHz Core speeds (MHz): 1: 1200 2: 1200 
Graphics:
  Device-1: AMD RV730/M96 [Mobility Radeon HD 4650/5165] vendor: Samsung Co 
  driver: radeon v: kernel bus ID: 01:00.0 
  Display: server: X.Org 1.19.2 driver: ati,radeon 
  unloaded: fbdev,modesetting,vesa resolution: 1366x768~60Hz 
  OpenGL: renderer: Gallium 0.4 on AMD RV730 (DRM 2.49.0 / 
  4.9.160-antix.1-amd64-smp LLVM 3.9.1) 
  v: 3.3 Mesa 13.0.6 direct render: Yes 
Audio:
  Device-1: Intel 82801I HD Audio vendor: Samsung Co driver: snd_hda_intel 
  v: kernel bus ID: 00:1b.0 
  Device-2: AMD RV710/730 HDMI Audio [Radeon HD 4000 series] 
  vendor: Samsung Co driver: snd_hda_intel v: kernel bus ID: 01:00.1 
  Sound Server: ALSA v: k4.9.160-antix.1-amd64-smp 
Network:
  Device-1: Qualcomm Atheros AR242x / AR542x Wireless Network Adapter 
  vendor: Foxconn driver: ath5k v: kernel port: 2000 bus ID: 02:00.0 
  IF: wlan0 state: up mac: <filter> 
  Device-2: Marvell 88E8057 PCI-E Gigabit Ethernet vendor: Samsung Co 
  driver: sky2 v: 1.30 port: 5000 bus ID: 06:00.0 
  IF: eth0 state: down mac: <filter> 
Drives:
  Local Storage: total: 305.83 GiB used: 4.35 GiB (1.4%) 
  ID-1: /dev/sda vendor: Western Digital model: WD3200BEVT-22ZCT0 
  size: 298.09 GiB 
  ID-2: /dev/sdb type: USB model: USB Flash size: 7.62 GiB 
  ID-3: /dev/sdc type: USB model: SiS-150a USB2FlashStorage size: 125.0 MiB 
Partition:
  ID-1: / size: 3.36 GiB used: 1.12 GiB (33.5%) fs: overlay source: ERR-102 
Sensors:
  System Temperatures: cpu: 44.0 C mobo: 44.0 C 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 153 Uptime: 16h 33m Memory: 3.83 GiB used: 1.32 GiB (34.6%) 
  Init: SysVinit runlevel: 5 Compilers: gcc: 6.3.0 Shell: bash v: 4.4.12 
  inxi: 3.0.29 

[Anonymous]

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websearch “linux samsung R520/R522/R620 backlight”
first search result was an Ubuntu Forums topic Solutions for Samsung Laptop problems (Backlight, Sleep, Keyboard issues, Hotkeys)
plenty of other matching search results.

So, it’s a known issue, and is an issue observed across various linux distributions, and apparently (i.e. I didn’t continue reading the websearch results on your behalf) one or more solutions do exist.

[Anonymous]

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Sorry, but I don’t think I’m gonna make it on this one.
Searches on forums only give me a lot of inxi and command, not always the same, there is nothing clear and precise, and I don’t know how to add a ppa to antix because debian is new to me, and I only found samsung-tools packages for ubuntu, I installed one (for bionic) but nothing works.
However I know samsung-tools on ubuntu & co, I have always used it without problems, but on antix it is another story apparently. Nothing in synaptic, that’s why I posted on this forum.
Anyway…… I give up, and I leave my luminosity as it is. Maybe I will find a solution later.
Thanks for your help;)

[Forum Admin anticapitalista]

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How about trying our new app – screenlight

apt-get install screenlight-antix

Philosophers have interpreted the world in many ways; the point is to change it.

antiX with runit - leaner and meaner.

[Anonymous]

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super, thank you. 😉

[Member seriousness]

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I don’t think this is hardware related, since I have this on my old PC as well (can’t check, because it is broken at the moment).
It also happens when backlight-brightness is mapped to shortcuts.
When I turn brightness up again, screen stays black until I switch it off with xset dpms force off (mapped to a shortcut) and on again by moving the mouse or pressing a key.

Is there a way to avoid this, maybe by setting a minimum brightness level?

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