Pavel Machek
Posts
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Pavel Machek
pavel
Subject: Sasha Levin is halucinating, non human entity, has no ethics and no memory
Hi!
So... I'm afraid subject is pretty accurate. I assume there's actual human being called "Sasha Levin" somewhere, but I interact with him via email, and while some interactions may be by human, some are written by LLM but not clearly marked as such.
And that's not okay -- because LLMs lie, have no ethics, and no memory, so there's no point arguing with them. Its just wasting everyone's time. People are not very thrilled by 'Markus Elfring' on the lists, as he seems to ignore feedback, but at least that's actual human, not a damn LLM that interacts as human but then ignores everything.
Do we need bot rules on the list?
Oh, and if you find my email offensive, feel free to ask LLM to change the tone.
Best regards,
Pavel
Hi!
So... I'm afraid subject is pretty accurate. I assume there's actual human being called "Sasha Levin" somewhere, but I interact with him via email, and while some interactions may be by human, some are written by LLM but not clearly marked as such.
And that's not okay -- because LLMs lie, have no ethics, and no memory, so there's no point arguing with them. Its just wasting everyone's time. People are not very thrilled by 'Markus Elfring' on the lists, as he seems to ignore feedback, but at least that's actual human, not a damn LLM that interacts as human but then ignores everything.
Do we need bot rules on the list?
Oh, and if you find my email offensive, feel free to ask LLM to change the tone.
Best regards,
Pavel
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Pavel Machek
pavel
@NekoCWD Hi! libcamera people told me you are working on autofocus for libcamera. I got that to work with great hacks at Librem 5 at one point: https://lists.libcamera.org/pipermail/libcamera-devel/2025-April/049734.html . Is your code public somewhere? What hardware are you using?
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Pavel Machek
pavel
How to install librem5 without an installer?
root@pureos:~# mount / -oremount,ro
mount: /: mount point is busy.
root@pureos:~# echo u > /proc/sysrq-trigger
root@pureos:~# mkdir /bar
mkdir: cannot create directory ‘/bar’: Read-only file system
root@pureos:~# cat /dev/sda > /dev/mmcblk0
root@pureos:~# sync
bash: /usr/bin/sync: cannot execute binary file: Exec format error
root@pureos:~#
root@pureos:~# mount / -oremount,ro
mount: /: mount point is busy.
root@pureos:~# echo u > /proc/sysrq-trigger
root@pureos:~# mkdir /bar
mkdir: cannot create directory ‘/bar’: Read-only file system
root@pureos:~# cat /dev/sda > /dev/mmcblk0
root@pureos:~# sync
bash: /usr/bin/sync: cannot execute binary file: Exec format error
root@pureos:~#
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Pavel Machek
pavel
Hey, world. I need Mobian installer for Librem 5, but the directory where it should be is empty. What is going on?
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Pavel Machek
pavel
https://www.seznamzpravy.cz/clanek/zahranicni-trump-mluvil-se-zelenskym-o-jeho-malem-problemu-summit-nato-2025-280240
Ještě pár dní před summitem nebylo jasné, zda ukrajinský prezident Volodymyr Zelenskyj vůbec přijede. Bez jistoty, že si na něj americký prezident Donald Trump najde čas, totiž cesta nedávala smysl. V podobné situaci se ocitl i na začátku měsíce, kdy kvůli G7 letěl do Kanady – jen aby zjistil, že Trump ze summitu odjíždí dřív, než k setkání dojde.
Tentokrát bývalý prezident USA oznámil možné setkání jen neurčitě – během ranního letu na palubě Air Force One, který mířil do Nizozemska.
Byvaly prezident USA? Uniklo mi neco duleziteho? :-)
Ještě pár dní před summitem nebylo jasné, zda ukrajinský prezident Volodymyr Zelenskyj vůbec přijede. Bez jistoty, že si na něj americký prezident Donald Trump najde čas, totiž cesta nedávala smysl. V podobné situaci se ocitl i na začátku měsíce, kdy kvůli G7 letěl do Kanady – jen aby zjistil, že Trump ze summitu odjíždí dřív, než k setkání dojde.
Tentokrát bývalý prezident USA oznámil možné setkání jen neurčitě – během ranního letu na palubě Air Force One, který mířil do Nizozemska.
Byvaly prezident USA? Uniklo mi neco duleziteho? :-)
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Pavel Machek
pavel
Hi!
I asked for help with ISP...
Can you program GPUs and do you want to become a HERO? #linuxphone
community needs your help.
[...]
and I got help. Both from humans and from language models. Quickly it
turned out Librem 5's GPU is fast enough for debayering at 24fps,
0.8MP and data can be transfered enough fast enough. Soon, it turned
GPU can use full 13MP image as a source, scaling it down to 0.2MP for
gstreamer mp4 recording.
This opens possibility to do phase-detection AF and digital
zoom. Librem 5 is not fast machine, its CPU/GPU/RAM is slower than
Thinkpad X220, for example.
Then I set out to investigate "how much of an ISP can I do" and it
turned out I did not yet find a limit.
So far I did black level, some attempt at denoise, three matrix
multiplies and gamma correction. (CPU could do black level + gamma +
one matrix multiply, almost, if I did vector instructions and a lot of
care). I don't know how much my GPU is loaded, but at the moment I
believe ISP on the GPU is the way to go.
Yes, I'm doing simpler debayer than usual, through not as simple as
explained below. I believe that's right choice when 13MP image is
available.
Code is at
https://gitlab.com/tui/tui/-/tree/master/icam?ref_type=heads . It has
some pretty rough edges. But get Librem 5, it is worth it :-).
Special thanks to @dos Sebastian Krzyszkowiak and @datenwolf.
Best regards,
Pavel
I asked for help with ISP...
Can you program GPUs and do you want to become a HERO? #linuxphone
community needs your help.
[...]
and I got help. Both from humans and from language models. Quickly it
turned out Librem 5's GPU is fast enough for debayering at 24fps,
0.8MP and data can be transfered enough fast enough. Soon, it turned
GPU can use full 13MP image as a source, scaling it down to 0.2MP for
gstreamer mp4 recording.
This opens possibility to do phase-detection AF and digital
zoom. Librem 5 is not fast machine, its CPU/GPU/RAM is slower than
Thinkpad X220, for example.
Then I set out to investigate "how much of an ISP can I do" and it
turned out I did not yet find a limit.
So far I did black level, some attempt at denoise, three matrix
multiplies and gamma correction. (CPU could do black level + gamma +
one matrix multiply, almost, if I did vector instructions and a lot of
care). I don't know how much my GPU is loaded, but at the moment I
believe ISP on the GPU is the way to go.
Yes, I'm doing simpler debayer than usual, through not as simple as
explained below. I believe that's right choice when 13MP image is
available.
Code is at
https://gitlab.com/tui/tui/-/tree/master/icam?ref_type=heads . It has
some pretty rough edges. But get Librem 5, it is worth it :-).
Special thanks to @dos Sebastian Krzyszkowiak and @datenwolf.
Best regards,
Pavel
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Pavel Machek
pavel
Mam tu lahvicku s napisem "sampon", dvema jednorozci a dvema srdicky. A otazka je -- je ten sampon pro me nebo pro zlutaka? 🙂.
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Pavel Machek
pavel
Ty kupy mrtvych civlistu v Gaze zacinaji byt tak velke, ze "smrt IDF" se pomalu presouva z kategorie "hnusny extremismus" smerem ke kategorii "vlastne docela rozumny pozadavek na zastaveni genocidy" :-(.
Billy Bragg (snip)
Anyone unable to understand why thousands of people joined Bob Vylan in chanting ‘Death, Death to the IDF’ at Glastonbury should read the article below. (snip)
theguardian.com
Israeli military used 500lb bomb in strike on Gaza cafe, fragments reveal
Billy Bragg (snip)
Anyone unable to understand why thousands of people joined Bob Vylan in chanting ‘Death, Death to the IDF’ at Glastonbury should read the article below. (snip)
theguardian.com
Israeli military used 500lb bomb in strike on Gaza cafe, fragments reveal
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Pavel Machek
pavel
OnePlus 6 ma tri fotaky, 2 vzadu a jeden selfie. #oneplus6 #linuxphone #oneplus6t Ty dva vzadu maji dost podobny parametry, jeden z nich na mainlinu funguje, druhy bohuzel ne, selfie funguje taky; tak proc neni podpora v Megapixels a internet plny fotek? No, protoze ten co funguje je makro kamerka ktera neumi fotit na dalku. Aha. Zahada vyresena.
OnePlus 6 has three cameras – two on the back and one selfie camera.
#oneplus6 #linuxphone #oneplus6t
The two rear cameras have quite similar specs. One of them works on mainline, the other unfortunately doesn't. The selfie camera works too.
So why isn't there support in Megapixels and why isn't the internet full of photos?
Well, because the one that works is the macro camera, which can't focus at a distance.
Ah. Mystery solved.
OnePlus 6 has three cameras – two on the back and one selfie camera.
#oneplus6 #linuxphone #oneplus6t
The two rear cameras have quite similar specs. One of them works on mainline, the other unfortunately doesn't. The selfie camera works too.
So why isn't there support in Megapixels and why isn't the internet full of photos?
Well, because the one that works is the macro camera, which can't focus at a distance.
Ah. Mystery solved.
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Pavel Machek
pavel
Opravuju ADSL modem... ten, co to schytal pri bource. Zatim jsem na opravu pouzil kondenzator z GME.cz (jeste jednou diky za trpelivost!), a papirovou karticku. Nechtelo se mi pajet, takze kondenzator je nasazen na nozicky toho vybuchleho. A ja bych mel brat sazky: Bude to fungovat?
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Pavel Machek
pavel
I, once again, believe that GPU on Librem 5 can be useful for debayering. #librem5 #linuxphone https://gitlab.com/tui/debayer-gpu/-/tree/master/bwtest?ref_type=heads
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Pavel Machek
pavel
Edited 8 days ago
edit: Thanks for all the heroes that chimed in. In meantime, I got help from entity that shall not be named, and currently have something fast enough. And I have great human experts on line, with patches to test. Thanks again! :-)
Can you program GPUs and do you want to become a HERO? #linuxphone
community needs your help.
We are trying record video, and have most pieces working, but one is
missing: fast enough debayering. That means about 23MB/sec on #librem5.
Debayering is not hard; camera images have subpixels split on two
lines, which need to be corrected. They also use different color
representation, but that's fixable by some table lookup and two matrix
multiplies.
Librem 5 has Vivante GPU, 4 in-order CPU cores and 3GB RAM. My feeling
is that it should be fast enough for that. If task is for some reason
impossible, that would be good to know, too.
Image data looks like this
RGRGRG...
xBxBxB...
.........
.........
Task is to turn that into usual rgbrgb.... format. rgb = RGB * color
matrix, with table lookups for better quality. I can fix that once I
get an example.
I'm looking for example code (#pinephone would work, too), reasons it
can not be done... and boosts if you have friends that can program
GPUs. #gpu #opensource
Can you program GPUs and do you want to become a HERO? #linuxphone
community needs your help.
We are trying record video, and have most pieces working, but one is
missing: fast enough debayering. That means about 23MB/sec on #librem5.
Debayering is not hard; camera images have subpixels split on two
lines, which need to be corrected. They also use different color
representation, but that's fixable by some table lookup and two matrix
multiplies.
Librem 5 has Vivante GPU, 4 in-order CPU cores and 3GB RAM. My feeling
is that it should be fast enough for that. If task is for some reason
impossible, that would be good to know, too.
Image data looks like this
RGRGRG...
xBxBxB...
.........
.........
Task is to turn that into usual rgbrgb.... format. rgb = RGB * color
matrix, with table lookups for better quality. I can fix that once I
get an example.
I'm looking for example code (#pinephone would work, too), reasons it
can not be done... and boosts if you have friends that can program
GPUs. #gpu #opensource
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Pavel Machek
pavel
Ok, I thought that "Librem 5 GPU is faster than X220 GPU" was a bit too good to be true. Turns out code was broken and simply produced black frames on Wayland... but did that fast. #linuxphone #librem5
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Pavel Machek
pavel
Did camera support on Librem 5 break with recent PureOS updates? That's bad timing for me :-(. #linuxphone #librem5
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Pavel Machek
pavel
Jasne ze srst izoluje. Ale vnitrni prostredi ma ~36C a je v nem tepelny zdroj; vnejsi s trochou stesti min. A zvirata na leto linaji, to se asi evoluce spletla... https://www.seznamzpravy.cz/clanek/domaci-zivot-v-cesku-ve-vedru-nebrat-zvire-do-rozpaleneho-auta-a-rozhodne-nezkracovat-srst-280494
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Pavel Machek
pavel
Quite scary: yt ChatGPT\ Is\ Becoming\ A\ Religion\ \[zKCynxiV_8I\]. Please do _not_ turn language models into priests, don't make it emulate Jesus or Gods. Its too easy to do, and ... it would be highway to hell if hell actually existed.
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Pavel Machek
pavel
GPU on Librem 5 is actually faster than on X220? Good. I proved to myself that 1Mpix/30fps is possible. Now for the boring task of actually getting it to work... #linuxphone #librem5
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