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by Nifnat
Wed Jul 17, 2019 6:35 pm
Forum: General discussion
Topic: 64 bit Ubuntu 18.04 on Pi4B
Replies: 29
Views: 5062

Re: 64 bit Ubuntu 18.04 on Pi4B

I'll see what I can figure out. Can I use the instructions in the OP and just swap it for an armv8 ubuntu 18.10 image? You could do that. I'd think that the 18.04 image should work fine as well. Looks like the instructions in the OP is pulling in the latest kernel so it should build the one with th...
by Nifnat
Wed Jul 17, 2019 6:08 pm
Forum: General discussion
Topic: 64 bit Ubuntu 18.04 on Pi4B
Replies: 29
Views: 5062

Re: 64 bit Ubuntu 18.04 on Pi4B

bomblord wrote:
Wed Jul 17, 2019 6:03 pm
Do I just need to run update/upgrade to get that fix or build it using something else? Going to try this out tonight.
You'd either need to build the kernel yourself or wait for somebody else to build it and then upload it.
by Nifnat
Wed Jul 17, 2019 4:01 pm
Forum: General discussion
Topic: 64 bit Ubuntu 18.04 on Pi4B
Replies: 29
Views: 5062

Re: 64 bit Ubuntu 18.04 on Pi4B

Well it "works" but I sadly can't any form of GUI to properly install. After installing the Ubuntu desktop environment I only get a mouse. When I tested it out about a week ago the Ubuntu Desktop didn't want to work properly. If you switch between virtual consoles and then back to the desktop you s...
by Nifnat
Sat Jul 06, 2019 6:09 pm
Forum: Troubleshooting
Topic: UART rpi4 braud rate?
Replies: 14
Views: 687

Re: UART rpi4 braud rate?

Did you confirm using vcgencmd measure_clock arm that it's actually running at that frequency? On this post here I was told that on the unstable firmware the max is 2GHz. Could be they have made a firmware change since I last tested it.
by Nifnat
Sat Jul 06, 2019 6:02 pm
Forum: Troubleshooting
Topic: UART rpi4 braud rate?
Replies: 14
Views: 687

Re: UART rpi4 braud rate?

Notupus wrote:
Sat Jul 06, 2019 8:12 am
Overclock the CPU to 2.15Ghz
The ARM frequency limit on the stable firmware is 1.75GHz. I found that if you set it above that value you end up actually under-clocking the CPU by a large factor. Might not be related to your problem but it couldn't hurt to try.
by Nifnat
Sun Jun 30, 2019 1:09 am
Forum: General discussion
Topic: What limits RPi4 OC to 1750 MHz?
Replies: 22
Views: 3133

Re: What limits RPi4 OC to 1750 MHz?

bunklung wrote:
Sat Jun 29, 2019 11:05 pm
I am curious how high you can get with the GPU? Any results to post on this?
Haven't looked into it much. I've heard you can't push it above 600 but haven't tested it myself. I'll probably wait for further firmware updates before I bother with it.
by Nifnat
Sat Jun 29, 2019 4:15 pm
Forum: General discussion
Topic: What limits RPi4 OC to 1750 MHz?
Replies: 22
Views: 3133

Re: What limits RPi4 OC to 1750 MHz?

4GHz VCO is the current limit on rpi-update firmware. If we're feeling brave, we add a config knob that drops the minimum divisor for the ARM cores to 1 so the frequency cap is 4GHz - but it may be that you get more instability when overclocking with a /1 than a /2 because PLL VCOs don't deliver pe...
by Nifnat
Sat Jun 29, 2019 12:54 am
Forum: General discussion
Topic: What limits RPi4 OC to 1750 MHz?
Replies: 22
Views: 3133

Re: What limits RPi4 OC to 1750 MHz?

How stable is 2GHz? What are you using for cooling? Is any overvolting used? I'm using over_voltage=4. Hasn't showed any signs of instability so far, left it running cpuburn for about 10 hrs and it was fine, Ran glxgears on it for a bit but don't really have anything to stress the GPU right now. I'...
by Nifnat
Sat Jun 29, 2019 12:31 am
Forum: General discussion
Topic: What limits RPi4 OC to 1750 MHz?
Replies: 22
Views: 3133

Re: What limits RPi4 OC to 1750 MHz?

The latest firmware from rpi-update lets you OC past 1750mhz. I've hit a wall at 2Ghz where is refuses to boot at anything higher, but that could just be the limits of my pi.
by Nifnat
Sat Feb 07, 2015 3:21 pm
Forum: Advanced users
Topic: Overclocking success over 1GHz?
Replies: 39
Views: 20600

Re: Overclocking success over 1GHz?

The max one of my B+'s booted at is 1.5GHz, with 1.4GHz being stable. This is of course using an external power source (1.8 V ).
The rest of my boards (A mix of B's and B+'s) will not go past 1.2GHz. Most of them reach the 1.2GHz cap at around +5 overvolt.
by Nifnat
Sat Nov 29, 2014 6:56 pm
Forum: Troubleshooting
Topic: Pi not booting
Replies: 7
Views: 919

Re: Pi not booting

Euh... what power supply did you use before, then? The Pi does not have an internal PSU... TBH: to me it means that before you were using a dodgy PSU and / or a dodgy micro USB cable. Gr. Dirk. I am using the "Raspberry Pi Universal Power Supply" which I bought from the Pi swag store. It works fine...
by Nifnat
Sat Nov 29, 2014 6:03 pm
Forum: Troubleshooting
Topic: Pi not booting
Replies: 7
Views: 919

Re: Pi not booting

So after spending an hour or so going through a few more SD cards I managed to get it to boot by hooking up the processor to an external power supply, which leads me to believe that my Pi might have a faulty voltage reg somewhere.
by Nifnat
Sat Nov 29, 2014 11:13 am
Forum: Troubleshooting
Topic: Pi not booting
Replies: 7
Views: 919

Re: Pi not booting

]what RPi model? was is working befor? what power supplies did you tried? what is on the SD cards and how was it flashed to? what do you see on the screen? what devices are connected to USB and GPIO? did you tried without any devices connected? It's a B+. It has been working fine for the last few w...
by Nifnat
Fri Nov 28, 2014 9:38 pm
Forum: Troubleshooting
Topic: Pi not booting
Replies: 7
Views: 919

Pi not booting

So I turned on my Pi this morning and it would not boot. Both the activity and power leds were on and no power was being supplied to any peripherals. I've already tried 2 different power supplies and 3 different SD cards with no change. Could anybody supply any help or should I just send it back und...

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