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by pica200
Sun Nov 24, 2019 10:09 pm
Forum: Advanced users
Topic: DVFS Firmware
Replies: 89
Views: 17331

Re: DVFS Firmware

There we go. We have a possible workaround now:
https://github.com/raspberrypi/firmware ... -557923066
by pica200
Sat Nov 23, 2019 8:47 pm
Forum: Advanced users
Topic: DVFS Firmware
Replies: 89
Views: 17331

Re: DVFS Firmware

I didn't use rpi-update because this came with a thirdparty kinda-bleeding edge distribution (namely Manjaro ARM). So i knew and accepted the risk of things breaking. It triggers me if someone says "non-standard anyway" to justify loss/limitation. Freedom of choice and modification of software/hardw...
by pica200
Sat Nov 23, 2019 7:44 pm
Forum: Advanced users
Topic: DVFS Firmware
Replies: 89
Views: 17331

Re: DVFS Firmware

This is a known side effect. I'm not going to say it's an issue, because overclocks are non-standard anyway. Are they non-standard? Yes of course but this has no relevance here because this new firmware is unnecessarily limiting functionality/capabilities which were working previously. If you/the d...
by pica200
Fri Nov 22, 2019 7:35 pm
Forum: General discussion
Topic: sudo rpi-update - broke my overclock PI4B
Replies: 12
Views: 1519

Re: sudo rpi-update - broke my overclock PI4B

You are not the only one. Basically everything requiring more voltage seems broken:

https://github.com/raspberrypi/firmware/issues/1290
by pica200
Mon Nov 04, 2019 8:43 pm
Forum: Gaming
Topic: How to setup Dolphin on a Pi 4 with Raspbian Buster
Replies: 32
Views: 29865

Re: How to setup Dolphin on a Pi 4 with Raspbian Buster

750 MHz for the GPU doesn't work. In all tests i have done everything higher than 600 was actually slower. This is probably another limitation like the 2 GHz limit before it got lifted. Thanks for letting me know. I saw the 600MHz restriction mentioned at https://www.raspberrypi.org/documentation/c...
by pica200
Mon Nov 04, 2019 1:44 am
Forum: Gaming
Topic: How to setup Dolphin on a Pi 4 with Raspbian Buster
Replies: 32
Views: 29865

Re: How to setup Dolphin on a Pi 4 with Raspbian Buster

You are probably seeing the same graphic glitches as in my screenshot above. It's a GPU driver/mesa issue. On a side note: 750 MHz for the GPU doesn't work. In all tests i have done everything higher than 600 was actually slower. This is probably another limitation like the 2 GHz limit before it got...
by pica200
Wed Sep 25, 2019 10:51 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 270
Views: 41276

Re: Pi4 as Desktop computer

Absolutely wrong. The point is that the Pi engineering has reached the stage where there is no need to derate components to achieve the specification -- so there is less margin for overclocking. That's good. You will also find that the boundaries are set so that almost all assembled Pis will meet t...
by pica200
Wed Sep 25, 2019 10:36 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 270
Views: 41276

Re: Pi4 as Desktop computer

It is able to run about everything fine at 2 GHz with over_voltage=5/6 and official power supply. Just not this. It shows the PMIC is a tight fit when not even 1.75 GHz works. [Citation needed]. Which SOCs are these? It was mentioned here in the forums somwhere that 2 GHz is the limit for the A72 at...
by pica200
Wed Sep 25, 2019 10:20 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 270
Views: 41276

Re: Pi4 as Desktop computer

Overclocking, by its very definition, is running the thing outside its rated specifications. I'm not saying it is not but every Pi before this one was able to overclock without stability issues. I guess we have yet another case of cheaped out on the wrong end (PMIC). Disappointing? There is absolut...
by pica200
Wed Sep 25, 2019 9:54 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 270
Views: 41276

Re: Pi4 as Desktop computer

I tried to reproduce this under a full 64 bits distro and unfortunately i can. The entire system just dies immediately as soon as it renders the preview image. There is not even a message about this in journalctl as far as i can see. This is pretty disappointing that we can't even get stable overclo...
by pica200
Tue Sep 24, 2019 5:47 pm
Forum: Advanced users
Topic: RaspberryPi 4: heatsink or fan
Replies: 84
Views: 52728

Re: RaspberryPi 4: heatsink or fan

That makes much more sense indeed. With so many Pi 4's in a closed case you need good cooling :)
by pica200
Tue Sep 24, 2019 5:25 pm
Forum: Advanced users
Topic: RaspberryPi 4: heatsink or fan
Replies: 84
Views: 52728

Re: RaspberryPi 4: heatsink or fan

:lol: what the f. That's the definition of overkill. I wonder when we will see a Pi 4 running inside of a fridge or with liquid nitrogen cooling :mrgreen:
by pica200
Tue Sep 24, 2019 5:18 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 357
Views: 158044

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

That will probably be a long wait. The chroot method is the best option right now if you don't want to use inofficial distros.
by pica200
Tue Sep 24, 2019 5:14 pm
Forum: Gaming
Topic: How to setup Dolphin on a Pi 4 with Raspbian Buster
Replies: 32
Views: 29865

Re: How to setup Dolphin on a Pi 4 with Raspbian Buster

@Raspberry Pi Rules!
Did you follow the guide by the letter? I can't speak for Raspian but Manjaro (using the official testing kernel now) works with Dolphin after compiling it myself. Maybe you are missing some libs the pre-compiled build needs?
by pica200
Tue Sep 24, 2019 3:45 pm
Forum: General discussion
Topic: RPI4: Why is everything still 32-bit?
Replies: 183
Views: 27665

Re: RPI4: Why is everything still 32-bit?

C is here to stay. Barely any of the other languages matches its performance and simplicity and at the same time it's very close to the metal. The type system of C is in fact pretty weak compared to many of the more modern languages and nothing stops you from type casting. The primitive types are in...
by pica200
Mon Sep 23, 2019 12:39 pm
Forum: General discussion
Topic: RPI4: Why is everything still 32-bit?
Replies: 183
Views: 27665

Re: RPI4: Why is everything still 32-bit?

With a 32 bits bus to the RAM you will be bottlenecked even with cache in RAM heavy applications because you will request data from the cache faster than it can fetch from DRAM (cache misses). There is a good reason many other SBCs and smartphones have a dual channel configuration with big caches. N...
by pica200
Sun Sep 22, 2019 8:28 pm
Forum: C/C++
Topic: C++ in real world, is it only me, or real world C++ is different from C++ in books and conferences?
Replies: 14
Views: 2440

Re: C++ in real world, is it only me, or real world C++ is different from C++ in books and conferences?

The later of what you describe is what i call "enterprise" code. Lots of useless and long namexpaces, builder, worker, factory and god knows what classes. It almost has meme character by now :mrgreen: C++ has a million ways to do the same and i would say barely anyone even scratches the surface of t...
by pica200
Sun Sep 22, 2019 8:10 pm
Forum: Advanced users
Topic: RaspberryPi 4: heatsink or fan
Replies: 84
Views: 52728

Re: RaspberryPi 4: heatsink or fan

So what is the problem again? If you use the Pi 4 in a well ventilated area and even better vertically mounted somewhere it will just run cool enough not to throttle with normal usage. If you really push it you will need extra cooling of which fans are the cheapest and most effective solution. If yo...
by pica200
Thu Sep 19, 2019 6:03 pm
Forum: General discussion
Topic: Armor case question
Replies: 13
Views: 1042

Re: Armor case question

Yes it's anodized and yeah, there is a gap. There are many clones around of this case and they are milled with varying tolerances. A thermal pad is the easiest and just works™. A copper sheet + thermal paste may work but no gurantee.
by pica200
Thu Sep 19, 2019 5:35 pm
Forum: General discussion
Topic: Armor case question
Replies: 13
Views: 1042

Re: Armor case question

I have Arctic Thermal Pad on my Pi/case. Pretty much any 6-7 W/mK or higher thermal pad will do. Higher is more expensive.
by pica200
Thu Sep 19, 2019 2:06 pm
Forum: General discussion
Topic: Armor case question
Replies: 13
Views: 1042

Re: Armor case question

No, the thermal pads bridge any gap. The heat dissipation of the SoC is so low it doesn't matter. But there is one thing you can do to increase the effectiveness of this case by a lot: Buy proper thermal pads. The included ones are garbage and have useless adhesive on them which insulates more than ...
by pica200
Wed Sep 18, 2019 11:45 pm
Forum: General discussion
Topic: Possible to add GLES EXT_buffer_storage driver support to Videocore VI on the Pi4?
Replies: 34
Views: 6294

Re: Possible to add GLES EXT_buffer_storage driver support to Videocore VI on the Pi4?

So basically game over. Makes me wonder what is all the fuzz about with EXT_buffer_storage when this feature doesn't actually affects performance.
by pica200
Wed Sep 18, 2019 3:13 pm
Forum: General discussion
Topic: latest rpi-update 2.5ghz with 4B 4g
Replies: 47
Views: 10014

Re: latest rpi-update 2.5ghz with 4B 4g

600 MHz + 2 GHz and overvoltage 6 makes it run a good 10°C higher than stock even with heatsink enclosure. Without extra cooling it will be on fire (not really)! I wanted to fine tune the voltage for a while but i'm missing a GPU stresstest. Something like cpuburna53 but for the GPU would be nice.
by pica200
Tue Sep 17, 2019 11:28 pm
Forum: General discussion
Topic: VPN
Replies: 6
Views: 671

Re: VPN

You seem to misunderstand how this is working. If you pay a VPN provider you pay them for access to their server. You want to connect to your Pi which costs nothing but time to setup the VPN server software and energy for it to run.
by pica200
Tue Sep 17, 2019 4:25 pm
Forum: Bare metal, Assembly language
Topic: Pi 4 Assembly Language?
Replies: 2
Views: 1626

Re: Pi 4 Assembly Language?

More importantly you need a toolchain targeting AArch64. The one Raspian comes with is for AArch32.

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