Can't control brightness
by rootaccess from LinuxQuestions.org on (#6H88Z)
I converted a VM into a physical laptop which worked like a charm. Its slackware 15.0. My laptop is a Thinkpad T480.
I can't seem to control the brightness with xbacklight or xrandr, getting errors from:
Code:# xbacklight -set 40
RANDR Query Version returned error -1Tried installing laptop-mode-tools which only displays my battery which is fine but no brightness setting.
I noticed this post here recommending how to change it, down towards the middle under "Every step required for xbacklight control"
https://askubuntu.com/questions/7153...cklight-folder
So here is some output from my system. I don't even want to look at the screen so I am using ssh. Tried VNC but password doesnt work. That's my other thread.
Code:# find /sys -type f -name brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::mute/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::power/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::standby/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinkvantage/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::micmute/brightness
/sys/devices/platform/i8042/serio0/input/input0/input0::scrolllock/brightness
/sys/devices/platform/i8042/serio0/input/input0/input0::capslock/brightness
/sys/devices/platform/i8042/serio0/input/input0/input0::numlock/brightness
/sys/devices/pci0000:00/0000:00:1c.6/0000:03:00.0/leds/phy0-led/brightness
/sys/devices/virtual/sound/ctl-led/speaker/brightness
/sys/devices/virtual/sound/ctl-led/mic/brightnessNothing found in /sys/class/brightness and any linking fails with Operation not permitted.
I don't want to have to reinstall slackware because I got all my settings from the VM and I've been wanting to do this for a long time. I had to use syslinux because this is an NVMe install, but worked great. Just trying to fix this brightness issue. None of my function keys work either
I can't seem to control the brightness with xbacklight or xrandr, getting errors from:
Code:# xbacklight -set 40
RANDR Query Version returned error -1Tried installing laptop-mode-tools which only displays my battery which is fine but no brightness setting.
I noticed this post here recommending how to change it, down towards the middle under "Every step required for xbacklight control"
https://askubuntu.com/questions/7153...cklight-folder
So here is some output from my system. I don't even want to look at the screen so I am using ssh. Tried VNC but password doesnt work. That's my other thread.
Code:# find /sys -type f -name brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::mute/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::power/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::standby/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinkvantage/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/brightness
/sys/devices/platform/thinkpad_acpi/leds/platform::micmute/brightness
/sys/devices/platform/i8042/serio0/input/input0/input0::scrolllock/brightness
/sys/devices/platform/i8042/serio0/input/input0/input0::capslock/brightness
/sys/devices/platform/i8042/serio0/input/input0/input0::numlock/brightness
/sys/devices/pci0000:00/0000:00:1c.6/0000:03:00.0/leds/phy0-led/brightness
/sys/devices/virtual/sound/ctl-led/speaker/brightness
/sys/devices/virtual/sound/ctl-led/mic/brightnessNothing found in /sys/class/brightness and any linking fails with Operation not permitted.
I don't want to have to reinstall slackware because I got all my settings from the VM and I've been wanting to do this for a long time. I had to use syslinux because this is an NVMe install, but worked great. Just trying to fix this brightness issue. None of my function keys work either