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by pica200
Thu Sep 05, 2019 7:55 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 395
Views: 169501

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

Ah, finally some 64 bit love! Thank you :) Technically i have been using this kernel already since weeks as part of a different distro (they are just building it from the linux fork on Github) and did not notice any kernel bug yet but the drivers are still pretty rough at the edges.
by pica200
Sun Sep 01, 2019 4:56 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

lol yeah, not using Python myself because it's really annoying having the interpreter as dependency for every script (not as much a problem under Linux as under other operating systems because almost always pre-installed) and it's slow indeed. The only thing i think it's good for is making prototype...
by pica200
Sun Sep 01, 2019 4:33 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Using 64 bit integers for everything is really stupid. What did the Python devs smoke when they made this decision? That explains the slowdown for sure and why everything else sees much better results.
by pica200
Sun Sep 01, 2019 2:54 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Is the Python comparison even a fair one? The difference seems too high to be true. Any AArch32/64 specific code in the interpreter? Hand optimized assembly?
by pica200
Sun Sep 01, 2019 9:13 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Mini DisplayPort is a non-starter as there are far more monitors that support HDMI than DisplayPort, and those that do support DisplayPort also have HDMI. Ok let's see. How likely is it to have a micro HDMI --> HDMI adapter or cable? Very unlikely because rare/obscure connector. And how likely is i...
by pica200
Sat Aug 31, 2019 8:16 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

The L2 cache is not very big either so memory bandwidth makes a difference. 32 bit bus per chip may be fine if you have 2 of them but for 1 it makes more sense to go 64 bit. This gives 64 bit distros an unfair disadvantage. And the 2 micro HDMI ports are a gimmick as you said. If you go dual display...
by pica200
Sat Aug 31, 2019 5:51 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

That's disappointing but expected. The Pi 4 looks good at first but if you dig deeper you find more and more compromises. Having a 64 bits bus would have been way better since it already has just 1 RAM chip unlike the competition.
by pica200
Sat Aug 31, 2019 1:21 pm
Forum: General discussion
Topic: Raspberry Pi Security
Replies: 26
Views: 1887

Re: Raspberry Pi Security

As advised above WiFi is not so good. If you can then connect it over ethernet. Otherwise make sure the network at least uses WPA2-PSK (AES) with strong password. WPA2 Enterprise is even better. The compute module is not going to help you much and with custom board design you will probably pay much ...
by pica200
Sat Aug 31, 2019 12:39 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Ok, got around to compiling snes9x-gtk. I can reproduce the non-power of two texture issue on Raspian. But i found out it only happens when "Use pixel-buffer objects" is also checked. snes9x-gtk seems to suffer from some slowdown i'm not seeing on Manjaro. In windowed mode it stutters but ...
by pica200
Sat Aug 31, 2019 9:53 am
Forum: General discussion
Topic: Which SSD to buy for raspberry pi?
Replies: 75
Views: 47518

Re: Which SSD to buy for raspberry pi?

superpowter77 wrote:
Fri Aug 30, 2019 8:20 pm
Next week, I am getting a mvme m.2 ssd drive to see how fast it can get on RPi 4.
If you buy it just for the Pi it's wasted money. Even SATA III SSDs easily saturate the single 4 Gbit/s lane available for the USB hub.
by pica200
Fri Aug 30, 2019 9:37 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Damn it. snes9x-gtk is not even in the repos on Raspian. Not even the cli version. Pretty frustrating so i have to build it myself :x On a side note: Never use a Pi 4 with a really old and slow microSD (6.6 MiB/s sequencial!). It's a pain. It was the only one i had left so no choice. The A1 rated ca...
by pica200
Fri Aug 30, 2019 9:30 am
Forum: General discussion
Topic: Raspberry Pi 4 overheat : why not underclocking a little ?
Replies: 27
Views: 16677

Re: Raspberry Pi 4 overheat : why not underclocking a little ?

I'm all for those massive passive heat sinks. For small jobs they do a good job. If you're running your CPU for longer duration at 25% or more load, you'll need to go with an active cooling solution (fan). You don't. At stock clocks the heatsink cases floating around will remove enough heat to stay...
by pica200
Thu Aug 29, 2019 11:38 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Okay I can run Dolphin with GLES3 on Manjaro now. I thought it was a problem with Mesa or libdrm, but just turns out I had unintentionally built off an older commit. Good to hear. Would have been strange if that distro behaved much differently than the others. I have not tried Dolphin yet and not s...
by pica200
Thu Aug 29, 2019 6:08 pm
Forum: General discussion
Topic: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?
Replies: 32
Views: 4743

Re: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?

RAM shaming. I routinely use more than 2 GB. Oh wait, I'm using it wrong. :roll: I know right? I found myself using nearly or over 2 GiB already in a few cases. Doesn't mean everyone will but then again unused RAM is used as fs cache ;) I wish we would not need so much RAM but it is how it is. Soft...
by pica200
Thu Aug 29, 2019 5:55 pm
Forum: General discussion
Topic: anyone compile Etcher or Rufus for Raspiban? - arm?
Replies: 1
Views: 552

Re: anyone compile Etcher or Rufus for Raspiban? - arm?

Maybe this is just preference but i find dd much quicker and it allows settings etcher will not like the block size. Just dealing with compressed images is a bit of a pain (there are a few decompression tools which support streaming i guess but meh).
by pica200
Thu Aug 29, 2019 5:49 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Does this not happen on 32-bit? Yeah, only happening with 16 bit textures. Changing to 32 bit textures fixes it but makes flickering effekts appear as solid color. I suspect that rendering problems on Manjaro are largely specific to that distro, not 64-bit per se. I've still been unable to run Dolp...
by pica200
Wed Aug 28, 2019 7:18 pm
Forum: General discussion
Topic: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?
Replies: 32
Views: 4743

Re: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?

if it is possible to sell mains cable to Hi-Fi nutters at £25 per 0.25 metres (https://www.hificollective.co.uk/catalog/neotech-mains-cable-nep-3160.html), a $299 RPi4B 8 Gbyte doesn't appear too outrageous. (That cable is cheap compared to the leads at https://www.stoneaudio.co.uk/?category=mains+...
by pica200
Wed Aug 28, 2019 4:21 pm
Forum: General discussion
Topic: Raspberry Pi 4 overheat : why not underclocking a little ?
Replies: 27
Views: 16677

Re: Raspberry Pi 4 overheat : why not underclocking a little ?

Then try it and report back. You will probably need to underclock + undervolt quite a bit to get temps down.
by pica200
Wed Aug 28, 2019 3:03 pm
Forum: General discussion
Topic: Raspberry Pi 4 overheat : why not underclocking a little ?
Replies: 27
Views: 16677

Re: Raspberry Pi 4 overheat : why not underclocking a little ?

As said above the fear is not heat damage but throttling. You won't get everything out of it when it can't hold the clock rate without going >80°C. I would not let it run at around 80 if it's a 24/7 Pi either but that's personal preference.
by pica200
Wed Aug 28, 2019 8:52 am
Forum: General discussion
Topic: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?
Replies: 32
Views: 4743

Re: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?

In theory you can replace it with a good hot air rework station, lots of flux and a properly reballed LPDDR4 chip with the matching pinout and layout. But it needs to be supported on the software side aswell and besides all this why? 8 GB maybe for some rare, extreme use case but 16? You don't need ...
by pica200
Tue Aug 27, 2019 2:46 pm
Forum: General discussion
Topic: Pi for Video processing and video hardware acceleration
Replies: 11
Views: 1135

Re: Pi for Video processing and video hardware acceleration

Get a fan for the Pi 4. It can reach throttling if under full load. In a closed case it will definitely.
by pica200
Tue Aug 27, 2019 1:43 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

I presume that all the people talking about wanting 64bit OS are keeping a close eye on our Linux repo. I do keep an eye on changes to the Linux fork. We did find some odd results with window compositing prior to Pi4 release, cannot remember if we ever determined the bottleneck. So it is a driver b...
by pica200
Tue Aug 27, 2019 5:57 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 45337

Re: Why moving to 64bit?

Has this been observed anywhere else yet? Enabling window compositing seems to slow graphics down by a lot . Especially noticeable through high rendering lag. I think Raspian suffers from the same problem but since lxde takes basically nothing it's not so noticeable. But on xfce on a full 64 bit OS ...
by pica200
Mon Aug 26, 2019 7:09 pm
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 66
Views: 30321

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

Did no before after test either but these heatsink enclosures seem to not block BT/WiFi much if at all. WiFi signal strength seems to be similar to other devices in the same room.
by pica200
Mon Aug 26, 2019 4:22 pm
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 66
Views: 30321

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

I have seen these heatsink cases with fan and always wondered where the fans suck/blow air from/to? Is there a hole in the heatsink or are the fans mounted in such a way so there is a gap between them and the heatsink? These tiny fans must be pretty noisy. I have a case without the fans and recently...

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