Hi After inadvertently hitting some random keyboard letter key the screen went considerably dim. I then went to bios adjusted brigtness individually for both battery and non battery operation. The brightness holds up part way into computer loading at startup,then dims.Is there a non bios control of which I am unaware.I welcome an analysis. Thanks, Anthony K
Hi Anthony, look closely at keyboard for a sun symbol. There are usually 2. The alt+(*/\) combo will increase the brightness. Let me know how it goes. If you cannot see the keys/symbols look up the manual for your laptop to find the right keyboard combination. Ted P. On Fri, Oct 12, 2018, 9:01 AM a <a@kaluta.us> wrote:
Hi
After inadvertently hitting some random keyboard letter key the screen went considerably dim. I then went to bios adjusted brigtness individually for both battery and non battery operation. The brightness holds up part way into computer loading at startup,then dims.Is there a non bios control of which I am unaware.I welcome an analysis.
Thanks, Anthony K
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Fn up down thanks to each On 10/12/18 9:09 AM, Ted Pomeroy wrote:
Hi Anthony, look closely at keyboard for a sun symbol. There are usually 2. The alt+(*/\) combo will increase the brightness. Let me know how it goes. If you cannot see the keys/symbols look up the manual for your laptop to find the right keyboard combination. Ted P.
On Fri, Oct 12, 2018, 9:01 AM a <a@kaluta.us <mailto:a@kaluta.us>> wrote:
Hi
After inadvertently hitting some random keyboard letter key the screen went considerably dim. I then went to bios adjusted brigtness individually for both battery and non battery operation. The brightness holds up part way into computer loading at startup,then dims.Is there a non bios control of which I am unaware.I welcome an analysis.
Thanks, Anthony K
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A., thank you for this question. I am glad a simple solution worked for you. Ted P. On Fri, Oct 12, 2018, 10:36 AM a <a@kaluta.us> wrote:
Fn up down thanks to each On 10/12/18 9:09 AM, Ted Pomeroy wrote:
Hi Anthony, look closely at keyboard for a sun symbol. There are usually 2. The alt+(*/\) combo will increase the brightness. Let me know how it goes. If you cannot see the keys/symbols look up the manual for your laptop to find the right keyboard combination. Ted P.
On Fri, Oct 12, 2018, 9:01 AM a <a@kaluta.us> wrote:
Hi
After inadvertently hitting some random keyboard letter key the screen went considerably dim. I then went to bios adjusted brigtness individually for both battery and non battery operation. The brightness holds up part way into computer loading at startup,then dims.Is there a non bios control of which I am unaware.I welcome an analysis.
Thanks, Anthony K
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_______________________________________________ nmglug mailing listnmglug@lists.nmglug.orghttp://lists.nmglug.org/listinfo.cgi/nmglug-nmglug.org
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a writes:
After inadvertently hitting some random keyboard letter key the screen went considerably dim. I then went to bios adjusted brigtness individually for both battery and non battery operation. The brightness holds up part way into computer loading at startup,then dims.Is there a non bios control of which I am unaware.I welcome an analysis.
Unfortunately it varies by manufacturer, but have a look into /sys/class/backlight. On both of my current (Intel graphics) machines, the file is /sys/class/backlight/intel_backlight/brightness so you can do things like cat /sys/class/backlight/intel_backlight/brightness or echo 3000 > /sys/class/backlight/intel_backlight/brightness (from a root shell). On my Asus the maximum is 4800 but I suspect that varies with make and model. Debian used to give me automagic controls on Fn-F6 and F7, but that stopped working when I upgraded to 64-bit stretch so I had to set up my own key bindings that used the /sys/class method. And yes, there is something during the boot sequence that restores the brightness from some saved value, but I don't know where that code lives. I have the impression that it's restoring from whatever /sys/class/backlight/intel_backlight/brightness was when the machine last shut down, so if you use that method to set the brightness to what you want, hopefully that will fix your problem. ...Akkana
On Fri, Oct 12, 2018 at 9:38 AM Akkana Peck <akkana@shallowsky.com> wrote:
On my Asus the maximum is 4800 but I suspect that varies with make and model.
Those must not be units with any meaning, then; my Librem15 can get pretty bright, but the numbers only go from 1 (all the way off) to 47 (dimmest) through 20 steps to 937 (brightest). It would be interesting if the monitor could be calibrated so that outputs lumens... By the way, to change them on my keyboard I press Fn-F5/F6 (the symbols are on the keyboard), so it goes to show there is not really a standard placement aside from 'out of the way'. GNOME also has a brightness slider. —Arlo
Here is my script that I use to set brightness with key bindings: https://regnitned.net/brightness.txt On 18-10-12 10:03:52, Arlo Barnes wrote:
On Fri, Oct 12, 2018 at 9:38 AM Akkana Peck <akkana@shallowsky.com> wrote:
On my Asus the maximum is 4800 but I suspect that varies with make and model.
Those must not be units with any meaning, then; my Librem15 can get pretty bright, but the numbers only go from 1 (all the way off) to 47 (dimmest) through 20 steps to 937 (brightest). It would be interesting if the monitor could be calibrated so that outputs lumens... By the way, to change them on my keyboard I press Fn-F5/F6 (the symbols are on the keyboard), so it goes to show there is not really a standard placement aside from 'out of the way'. GNOME also has a brightness slider. —Arlo
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participants (5)
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a -
Akkana Peck -
Arlo Barnes -
Casey Dentinger -
Ted Pomeroy