2026-10-28T00:52:53Z https://nostr.now Pavel Machek https://nostr.now/npub1hquy5jd6kctnkewwu7mdcykkfcdp3ujeq4c4j6dlrg64zjj0jhys76zr0f https://media.social.kernel.org/media/e20052b21cbc5688359f86775eb752742a615e1bc9074f5673de6a8aa354ccb9.jpg https://media.social.kernel.org/media/e20052b21cbc5688359f86775eb752742a615e1bc9074f5673de6a8aa354ccb9.jpg https://nostr.now/nevent1qqsyxykaqrrt4a7vt8uzwya4nlu8fv02r04l7d9mhlqzgrtfmhngdcqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uj0wtngc In reply to <a href='/nevent1qqsx6nv2squv92jx7pzq4ntuunrxdxweq6mhpn56452cz6s8kzcxwzs3qjaxx'>nevent1q…jaxx</a><br/>_________________________<br/><br/>I don&#39;t believe libcamera supports autofocus at the moment, which is probably show-stopper. 2026-08-22T11:12:47Z https://nostr.now/nevent1qqsfth42zqhtacmgnmr2ejmpwg4e780qu2gz6dcdgu9uaua4wwsj4nszyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujnslh2t Game for today: <a href="https://www.drivemad.com/">https://www.drivemad.com/</a> . On level 50, just look it up on yt. 2026-06-29T15:53:48Z https://nostr.now/nevent1qqsp42gn8hdl39y89ka340mnnu76hr0056l0dwdwc0pxezvl3u3hrjszyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uj4vsnnk I had many phones. Some were good, some were bad, and some were meh. Siemens sl45i looked like good phone, but it was not, partly because they forgot to debug it. Ericsson t68i was nice (70? grams), bluetooth was improvement. Nokia 6230 was very nice phone (99 grams), Nokia 6230i was downgrade, and Ericsson K700i was not a good phone. UI was not great and it would not hold in one piece. <br/> <br/> I had HTC Dream (aka T-Mobile G1). Having Linux inside was &#34;cool&#34; but it definitely was not good, and was not a phone. Nokia N900 was better, Linux worked a bit better, but still not a phone. And than it got ... worse? Motorola Droid 4 is better version of N900, but bigger again. Pine Phone, Librem 5, OnePlus 6 ... yes, each one is better computer, but neither is really a good phone. <br/> <br/> And then I got Geeksphone Keon (Firefox OS). It runs Linux (kernel 3.4 or something), but rather old one, and is certainly not a good computer, but it started feeling as a phone, again. Reasonably battery life (few days), and it would actually fit into pockets I had available when riding horses. I liked that one. 120grams. <br/> <br/> And now I have a new toy (actually few &#34;new&#34; toys, thanks!) that starts to feel like phone. Siemens S4 mini VE (110 grams) is really nice phone. Small enough and can last few days (with LineageOS), and with #postmarketos it seems to be pretty good computer, too. It runs mainline kernel, and most of the stuff mostly works (except cameras). Wow! Once again, I have phone I like (or four). <br/> <br/> Samsung was not even too evil when creating the phone, so you can just hold buttons and enter bootloader. Certainly improvement from OnePlus 6, where I will likely never get rid of red errors during boot. There is a bit of evil in the details, that &#34;VE&#34; or &#34;value edition&#34; is important. That is i915i, which is very, very different from &#34;S4 mini&#34; or i915. Mainline support is very limited for i915 -- you will not get touchscreen, for example. <br/> <br/> Any help would be welcome. And if you have S4 mini you do not need, I may be able to use it. <br/> <br/> #i915 #i915i 2026-01-20T18:49:53Z https://nostr.now/nevent1qqs80056p6vw5z9mwhxt7dnmzeh6ewxc2ax4h8eav0a6qqwmemvz0ygzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujfh2f6w I have Samsung S4 Mini (i9195) running close to mainline 6.19. Good. It took me more debugging that it should. <br/> <br/>I also have patches that allowed me to trace execution from assembly to init/main.c to pagetable setup in C, using pixels on framebuffer and then with hacked console. 2026-01-03T22:47:16Z https://nostr.now/nevent1qqszkzsa3j6yuz5dttkp4hgl6m4f6tge3f09tjsagag66tm7g5wglsgzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujspmgdp Self-built lk2nd simply works on S4 mini. Wow. That was easy :-). 2025-12-28T23:56:38Z https://nostr.now/nevent1qqspjddtcvukjk9wzvyzskr7a97kwauzrf6thupfdp9fhmue96hu07czyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujrq8v02 Libcamera &#34;simple&#34; example usage has three files, 600 lines total. Good news is that it works, bad news is that it stops working almost as soon as I modify it... and not in a way that is easy to debug (segfault, debug trap, backtrace pointing to source line with &#34;}&#34;). I integrated it with SDL, and that was easy, got buffers mapped and translated to format that can be displayed. But when I try to close front camera and open back one, or to change resolution, bad things (tm) happen. Fact that empty build takes 15 seconds also does not help. <br/> <br/>My code is at <a href="https://gitlab.com/tui/libcamera/-/commit/456a19f64e1b0959cdc9b1b9fa666963772a383c">https://gitlab.com/tui/libcamera/-/commit/456a19f64e1b0959cdc9b1b9fa666963772a383c</a>. Press &#34;Snap&#34; button to demonstrate the problem. <br/> <br/>If you can help debugging it, or can get it to work, or know better example to start from, please let me know. Would not mind boosts. You may get libcamera based application to take photos / record videos on phones in future if we can get this to work. 2025-11-25T22:52:36Z https://nostr.now/nevent1qqsw5ufuygzgtcwu0t0jx8537kzvsz2kequhh0jsm4s48022xvspxuqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uj8nsch2 Front camera on OnePlus 6 now &#34;works&#34; with libmegapixels. Good. More work ahead. 2025-11-15T10:43:08Z https://nostr.now/nevent1qqsqztqpv4d5p689kugye3hjdwezglt7kcxm7r4mnp5rflfeps6adqqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uj7dkr55 I&#39;m experimenting with sensors on #librem5 (but should work on #linuxphones after tweaks). So far I have compass and step counter. github.com:pavelmachek/Espruino.git 2025-11-03T09:11:06Z https://nostr.now/nevent1qqsgx40hg7jwngklwcp5lz56z9nne0ycrfmm79ja53jwe4ln558fweczyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujq5ng5h #phonecamera #linuxphone #librem5 <br/> <br/>Librem 5 camera/kernel can do three possible resolutions, ~1024x768 @ ~24fps, ~2048x.. @ ~31 fps and ~4096x.. @ ~15fps. Debayering is actually easier and better quality if we downscale at the same time, and that allows best framerate, so we do that (2048x.. resolution). <br/> <br/>ARM has problems with cache coherency w.r.t. DMA, and kernel solution is to simply disable cache on DMAbufs for userspace, which means accessing video data is 10x slower than it should be on the CPU. Which means debayering on GPU is attractive, and that&#39;s what we do. (gold.frag). GPU can do more image signal processing functions easily, too, so we do some of that. <br/> <br/>Unfortunately, we hit the same uncached memory problem at the GPU output. So we use separate thread to copy. All this unfortunately does not fit on one core, so we need two threads, one controlling GPU debayer on frame n+1, while the other one copies video data from frame n. (heart.c). We save resulting RGBA data to ramdisk. This all costs maybe 80% of one core. <br/> <br/>From there, Python scripts can pick them up: ucam.py displaying the viewfinder and mpegize.py handling the video encoding via gstreamer. There&#39;s basically 0% cpu left, but I can encode ~1024x.. video. Unfortunately that&#39;s without audio and with viewfinder at 1fps. Plus, combination of C + Python is great for prototyping, but may not be that great for performance. <br/> <br/>Code is here: <a href="https://gitlab.com/tui/tui/-/tree/master/icam?ref_type=heads">https://gitlab.com/tui/tui/-/tree/master/icam?ref_type=heads</a> . <br/> <br/>At this point I&#39;d like viewfinder functionality merged into the rest of GPU processing. Ideally, I&#39;d like to have a bitmap with GUI elements, combine it with scaled RGBA data, and rendering it to screen. I know SDL and Gtk, SDL looked like better match, but I could not get SDL and GPU debayering to work in single process (template SDL code is here <a href="https://gitlab.com/tui/debayer-gpu/-/blob/master/sdl/main.c?ref_type=heads">https://gitlab.com/tui/debayer-gpu/-/blob/master/sdl/main.c?ref_type=heads</a> ). <br/> <br/>If you can integrate main.c and heart.c, that would be welcome. If you have example code that combines SDL with processing on GPU, that would be nice, too. If you know someone who can do GPU/SDL, boost would not be bad, I guess. <br/> <br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1mkmzc7ttrmlp3vzthpq6ztd6923dv4yf507vee99q7euu7rhwldqsuc0eu" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>datenwolf</span> (<span class="italic">npub1mkm…c0eu</span>)</a></span> <br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1f27wvsjq7y7z9lqlhvekttp67lrnr544m7p2qtqsrl79dyuj7fysc9g56p" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Doylov Vasiliy</span> (<span class="italic">npub1f27…g56p</span>)</a></span> <br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1ws3mqxgvrrjkwmsuclth6najr48wcw9yvcwuwqjvvpld5qh6envq9ehalv" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>dorotaC</span> (<span class="italic">npub1ws3…halv</span>)</a></span> <br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1r3zf273rgsktvc7twg8hm52u824ezafkp442lpwsyyd2u9qnmqts2s03cf" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Martijn Braam</span> (<span class="italic">npub1r3z…03cf</span>)</a></span> 2025-07-17T09:43:20Z https://nostr.now/nevent1qqs2lnq7hfun3f5nusya7ayxcza5dr659p5xd2f6yh0gpmnwx3jwcygzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujl2c0wn 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! :-) <br/> <br/>Can you program GPUs and do you want to become a HERO? #linuxphone <br/>community needs your help. <br/> <br/>We are trying record video, and have most pieces working, but one is <br/>missing: fast enough debayering. That means about 23MB/sec on #librem5. <br/> <br/>Debayering is not hard; camera images have subpixels split on two <br/>lines, which need to be corrected. They also use different color <br/>representation, but that&#39;s fixable by some table lookup and two matrix <br/>multiplies. <br/> <br/>Librem 5 has Vivante GPU, 4 in-order CPU cores and 3GB RAM. My feeling <br/>is that it should be fast enough for that. If task is for some reason <br/>impossible, that would be good to know, too. <br/> <br/>Image data looks like this <br/> <br/>RGRGRG... <br/>xBxBxB... <br/>......... <br/>......... <br/> <br/>Task is to turn that into usual rgbrgb.... format. rgb = RGB * color <br/>matrix, with table lookups for better quality. I can fix that once I <br/>get an example. <br/> <br/>I&#39;m looking for example code (#pinephone would work, too), reasons it <br/>can not be done... and boosts if you have friends that can program <br/>GPUs. #gpu #opensource 2025-07-01T19:04:44Z https://nostr.now/nevent1qqs9lwppfls2ckljnxrr9ew0sp65dc8an6jcph68n2evpglgse35wmgzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujz63pe4 In reply to <a href='/nevent1qqsyrkx37st035npjl2fnsplc2rc06yy2c4vccngcdn9xlxfdln8sncxrywl5'>nevent1q…ywl5</a><br/>_________________________<br/><br/>Dunno. Perhaps simply avoid running screen-capturing malware? If Microsoft will not allow uninstall of Recall, you can still uninstall Windows... 2025-05-22T09:11:21Z https://nostr.now/nevent1qqsp86dm6ghmrdehaeuyxme534uylygvu9uppkusswpjpjshktex3eqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujmxyn37 In reply to <a href='/nevent1qqstwk6t2yg63qp6qeqqd8dkvgkpfae5qfcc69kmn0wlty8h2ytltuq8pzgxm'>nevent1q…zgxm</a><br/>_________________________<br/><br/>LLMs have some good uses. &#34;Translate this to czech&#34;. &#34;Translate this to Javascript&#34;. Other stuff is more hit and miss, but I was able to do &#34;I need graphics format which is basically width/height/fourcc&#34;... and I got that. [And if you know format other than .dds that meets the requirements, let me know.] 2025-04-11T20:49:41Z https://nostr.now/nevent1qqstej9xf0z05vtdwrj3y8v0fweu8hpykhwjfpdwren24cxwptcalxqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujrjgl46 In reply to <a href='/nevent1qqsrt2flvpxn78aukem48chv3mvml7jsyhg6nuq7q994m9q9nljdn9smcphzv'>nevent1q…phzv</a><br/>_________________________<br/><br/>Why is &#34;retaliate&#34; bad option? Seems like prisoner&#39;s dilemma to me, and retaliation is crucial there. 2025-04-04T07:53:09Z https://nostr.now/nevent1qqszk3cegkqg2pvpptlzvumplhkse0xac2zlj8tlsa7v2n5sfldqz5czyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujnsruqy In reply to <a href='/nevent1qqszeeg0pehx4e7tcsjc4pgmycpcv4d45xfvuyjkx6gy8upuvsnelrsjev34q'>nevent1q…v34q</a><br/>_________________________<br/><br/>ToS only applies to Firefox binaries. Get sources, or get your binaries from Debian who gets sources. 2025-03-07T07:33:37Z https://nostr.now/nevent1qqs2x5sz78c9yqfegnwh02cgu9je2g337tarkvgtpwrku2p4t54qpxszyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujf7dxt3 In reply to <a href='/nevent1qqsqpq9zmyuu33xfg03k0d4lwnelrwlswnu5g98ersntpcvvuzqjd7gktdzjy'>nevent1q…dzjy</a><br/>_________________________<br/><br/>Is that those &#34;power button with fingerprint sensor&#34; thingies? I guess we&#39;ll first want the fingerprint stuff working, but yes, that could be useful. 2025-02-08T20:25:27Z https://nostr.now/nevent1qqszp255nkjv6527hdjx5zp2cvg2tldvm2fzzqg0yaqqupl4de4lf2gzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujlfu3cp In reply to <a href='/nevent1qqspjp2d72cgkh3u64mhq8r4nx86tg4jnhqzz88w2pxm89wyvpu4vdscdc8qp'>nevent1q…c8qp</a><br/>_________________________<br/><br/>Yeah, except that&#39;s focus, not optical zoom. But I guess we&#39;ll need something on touchscreen. I suggest taking focus/exposure on press, and taking photo on release. 2025-02-08T20:21:25Z https://nostr.now/nevent1qqstvl2ep9ml7ep37fdcdtd8f72nld8jst4udq49zhv4ww0qs44mm9qzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uj4cqzv0 So everyone is taking pictures with #oneplus6 #mobilelinux #postmarketos . Can you get me some metadata? Which sensor works, resolution, what format does it use? (BGGR8? BGGR10? Something better?) I am using Librem 5, but that only has 8-bit bayer working (and many other problems). 2025-02-07T12:23:28Z https://nostr.now/nevent1qqsdn6uw7t3jmccalrvrwm4tcvg9vh93dd6fchvmmm44dfylm5nf2fgzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujg6uug8 In reply to <a href='/nevent1qqsqt7r3g0qjvx0xzsavx2pmechu5kyzysk9f3jxauyahhs2lrvarsq8tssdt'>nevent1q…ssdt</a><br/>_________________________<br/><br/>If you consider zerophone viable, you should consider oneplus 6, too. All are usable. PinePhone and Librem 5 are a bit slow for today&#39;s web. 2024-12-03T20:52:01Z https://nostr.now/nevent1qqs9ex4qaudw8h0rmxwlvhy7rauwqzhzcaklap7d7p3ha9whufq3srqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujkt6klp In reply to <a href='/nevent1qqswkjewnvdxz9ew79v950gc4ltkwwv5jh7dypzne6futzmjyscsrzsphncpw'>nevent1q…ncpw</a><br/>_________________________<br/><br/>How well does Linux work with s2idle? All stable/reliable/works on all hw that supports it? 2024-12-01T17:20:11Z https://nostr.now/nevent1qqsywjme4kdpjv7hxmj5uflu6a0tdfw2fc084yjm75z7usc2eh3stfqzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujuve97h In reply to <a href='/nevent1qqsvxrgsxks55uuu5zmpqxmat388nz95nky7fa305fpxajpguv7qzvqp90u0l'>nevent1q…0u0l</a><br/>_________________________<br/><br/>Dells have them, too. I&#39;m pretty sure those patents are already expired. 2024-10-23T07:13:05Z https://nostr.now/nevent1qqs8kunpuuxrgmzvqsq3tnla34ps839q4ffp6w0x5umdkzxqvswsstgzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uje529fs In reply to <a href='/nevent1qqswlgd7hkxah5tqq4gqf7vehcz09wuylwwx4fkg0dufm28uew397us7eqgxf'>nevent1q…qgxf</a><br/>_________________________<br/><br/>1) Still does not mean that people should not randomize IMEIs. If randomized IMEIs will become common, world will improve. In 1995 Linux was uncommon and would &#34;draw attention&#34;. Today, it is very good idea. 3) agreed. IMO we should still try to improve cellular privacy. 2024-10-17T10:20:14Z https://nostr.now/nevent1qqswe3kq89x93kp8yht4maxnyj4xcuwqvk27cuz6ddk9flvw4dulx2gzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72uj90zljy In reply to <a href='/nevent1qqs2m5d0uamcg3q5vh2sm8h939a9ghjsg8mnfej0z2xs24fyyjmea4sgsd557'>nevent1q…d557</a><br/>_________________________<br/><br/>Of course, Furilabs can do the minimum required by law, but what was the reason to care about their hardware? Fairphone is actually doing more than minimum required -- they are working on upstreaming their kernel changes, perhaps take that one, instead? Or PinePhone? Or Librem 5? Ore OnePlus 6 (where vendor did the minimum but community is doing lot more)? 2024-09-15T09:48:09Z https://nostr.now/nevent1qqst2aagh7xh9qwa7fpfpn6xrxaczlacrjdhfk6qmy7xh53zaavdu2gzyzursjjfh2mpwwm9emnmdhqj6e8p5x8jtyzhzktfhudr2522f72ujnryurz Moving closer to usable cameras. <a href="https://gitlab.com/megapixels-org/Megapixels/-/merge_requests/29">https://gitlab.com/megapixels-org/Megapixels/-/merge_requests/29</a> 2024-09-03T13:03:18Z