Alexander Martin (alm) @alexbuzzbee@fosstodon.org
I'm a computer programmer and #ComputerScience student with a moderate enthusiasm for #FOSS. I like computers, cool #tech, #space, and good #books.
Pronouns: https://pronoun.is/he/him/his/his/himself
Timezone: US Eastern Time
www: https://www.alm.website/
Matrix: @alexbuzzbee:matrix.org
Mail: [The contents of the parenthetical in my display name]@alm.website
Joined Dec 2018
Pinned toot
I prefer both my hardware and my software to be user-serviceable.
Pinned toot
I would like to remind everyone that if I follow someone or boost their post, that does not mean I think they are a good person. It means I find their posts interesting, and that is it.
ENOMEM? In my program? It's more likely than you think.
Apparently Lua is capable of emitting 35K of debug output even when I try to kill it immediately.
./script.lua | tee script.out &; killall lua
I'm having fun playing with sysfs on my new laptop. Keyboard backlight colors! Screen brightness! Turning on the airplane mode LED! A mysterious "phy0-led"! DMI data! Thermal stuff! Trying to disable the graphics card and getting EBUSY!
Alexander Martin (alm)
boosted
@alexbuzzbee Oh, this is intel_backlight? There's hysteresis going on there, too; I think it uses the numbers as vague suggestions rather than any actual scale, and only changes when there's a significant enough difference between current and future backlight.
Alexander Martin (alm)
boosted
@alexbuzzbee -.(o.o).-
Probably a bit of both. There's one driver for many chips, and the hardware's designed for the Windows® backlight scale (0–100, where 0 is about a tenth as bright as 100); the interactions between them (and, likely, the driver having been written for a completely different chip's undocumented behaviour that just-so-happens to mostly-work on the current generation) would be my guess.
The modern equivalent of https://xkcd.com/303:
"I have five CI runs queued."
Apparently 1/60000 brightness is perfectly visible? Great numbers there Intel.
And the fans even run at appropriate speeds without a user-space daemon controlling them.
Hey guess what. I can close the lid on my new* laptop and it goes to sleep and then it wakes up when I open it. It doesn't even crash horribly afterwards.
* 10-month old but just now being actually used
Yeah thanks GRUB, call the USB removable disk hd0. That's not gonna cause any problems.
I'm reading my entire dmesg log.
Related: I now have a /usr/local/src directory.
It has to be compiled because setuid is ignored on interpreter scripts, which is sensible.
I just wrote, compiled, and installed in /usr/local/bin a setuid program to set my screen brightness.
Alexander Martin (alm)
boosted
Ever do that thing where you code for a long time without committing and then you have to untangle the changes and pick it apart into a couple dozen commits?
If I open /dev/tty (which I believe is the controlling terminal) instead of using standard out, it's a different error:
mmap: Permission denied
Which the man page says may happen if "A file descriptor refers to a non-regular file."
What happens if you mmap a tty I'm too sleepy to get up and try it but not too sleepy to type this I'll try it in the morning and let you know.
I'm a computer programmer and #ComputerScience student with a moderate enthusiasm for #FOSS. I like computers, cool #tech, #space, and good #books.
Pronouns: https://pronoun.is/he/him/his/his/himself
Timezone: US Eastern Time
www: https://www.alm.website/
Matrix: @alexbuzzbee:matrix.org
Mail: [The contents of the parenthetical in my display name]@alm.website
Joined Dec 2018
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