Go to advanced search

by milhouse
Sat Feb 27, 2016 4:39 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

. Do I need to accept confluence skin if I'm to get HEVEC performance? all other file types play like a dream and my system is slick and fast with a mSata SSD running the system. Pretty much, yes. Third party skins are playing catchup as Kodi 17 has (intentionally) broken compatibility with Kodi 16...
by milhouse
Sat Feb 27, 2016 4:33 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

Cheers Millhouse for the fast reply. I know what version of Openelec I have, I updated yesterday (it was posted to http://openelec.thestateofme.com/dev_builds/ ) it's the last build posted on 26th Feb. I hope it's ok to link to this. I'll look now for my version. I'm happy with the build I have, I'...
by milhouse
Sat Feb 27, 2016 3:11 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

Hi All, New member, but been reading and following this thread for a while. Awesome work on the OC front. I run a few RPi2 using Openelec running a Dev version of Jarvis. I have managed to get my Sdram running at 550, but struggling to get any higher. This is where I'm stuck. I don't actually know ...
by milhouse
Thu Feb 04, 2016 5:00 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

Here's a Python script, schmoo.py, that can be used to convert between the encoded and plain schmoo formats: #!/usr/bin/env python # -*- coding: utf-8 -*- import sys default = [2,3,2,0,0,-2,-2,-2,-10] def SE(x, n): r = (((x << (4*n)) & 0xffffffff) >> 28) return (r - 16) if r >= 8 else r def ES(x, n)...
by milhouse
Sun Jan 31, 2016 1:21 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

The thing is, if you need "vcgencmd schmoo" to make your RAM stable, it's entirely possible the system won't make it as far as /etc/rc.local or /storage/.config/autostart.sh etc. before crashing due to sdram issues...
by milhouse
Sun Jan 31, 2016 12:58 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

@milhouse. Excuse my ignorance, could you please tell what i should put in the autostart.sh and the config.txt to get this increased speed? These is my current stable setup in config.txt: arm_freq=1100 core_freq=550 sdram_freq=530 over_voltage_sdram=4 over_voltage=4 force_turbo=1 I added: echo powe...
by milhouse
Sat Jan 30, 2016 4:39 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

I settled on 600MHz with over_voltage_sdram=5 and schmoo=4/0 (with disable_pvt=1, this is with latest release firmware not the custom firmware). I ran memtester 850 for many hours without failure, and played several hours worth of video (including HEVC) without any issue. Overclocking sdram has defi...
by milhouse
Wed Jan 27, 2016 1:04 am
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

When using default schmoo, my max stable sdram is 530/+4 (or +5 with an extra margin of safety). These are my schmoo results for 600/+8 when running "memtester 850": FAIL: schmoo=2,3,2,0,0,-2,-2,-2,-10 FAIL: schmoo=3,3,2,0,0,-2,-2,-1,-10 FAIL: schmoo=4,3,2,0,0,-2,-2,-2,-10 FAIL: schmoo=4,3,2,0,0,-2,...
by milhouse
Tue Jan 26, 2016 11:42 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

jahboater wrote:
I added those lines to config.txt with your suggested values and I'm stable at
Did you mean config.txt? It looked to me like /etc/rc.local might be the best place for vcgencmd.
Indeed, I don't think there's (currently) a method to set schmoo in config.txt.
by milhouse
Tue Jan 26, 2016 12:23 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

If using force_turbo=1, what's the best way to force an sdram frequency change as I'm assuming that changing scaling_governor may have no effect.
by milhouse
Tue Jan 26, 2016 10:10 am
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

After additional testing with "memtester 850" I'm revising the spec of my sdram down from 550/+5 to 530/+4 - it fails on 530/+3, although I may eventually run it +5 for an increased margin of safety. Any higher frequency, eg. 535, will fail in a single location on "Bit Flip", even with over_voltage_...
by milhouse
Sun Jan 24, 2016 10:35 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

When testing 550MHz you may need to bump over_voltage_sdram higher than default - when using sdram_freq > 450MHz the new firmware will automatically use over_voltage_sdram=4, but you may need over_voltage_sdram=5 (or even 6) for stable 550MHz operation (5 works for me).
by milhouse
Sat Aug 01, 2015 12:50 pm
Forum: Advanced users
Topic: Linux kernel is now 4.0
Replies: 182
Views: 91259

Re: Linux kernel is now 4.0

by milhouse
Tue Jul 07, 2015 3:18 am
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

expandables wrote:What's the benefits of overclocking the sd host for example

Code: Select all

dtoverlay=sdhost,overclock_50=63
See this earlier post which benchmarks performance at different overclocks.
by milhouse
Mon May 18, 2015 5:42 pm
Forum: Advanced users
Topic: Overclocking
Replies: 1125
Views: 600157

Re: Overclocking

Regarding my observations about the mmc driver not hitting 50Mhz when core_freq=500: The mmc clock is locked to 250MHz. This makes it immune to variations in core frequency, but also means you can't get to other SD clock frequencies by varying core_freq. in which case 63 is the only possible overclo...
by milhouse
Fri Apr 17, 2015 10:33 pm
Forum: Off topic discussion
Topic: Have they not heard of a RPi ?
Replies: 19
Views: 2736

Re: Have they not heard of a RPi ?

I do agree with him that typing and certain activities are better done with a real, full size keyboard and mouse than a touchscreen keyboard, or even a laptop keyboard/touchpad. But yes, the activities discussed seemed a little contrived and perhaps far fetched however the vibe I'm getting from the ...
by milhouse
Fri Apr 17, 2015 9:20 pm
Forum: Off topic discussion
Topic: Have they not heard of a RPi ?
Replies: 19
Views: 2736

Re: Have they not heard of a RPi ?

Intel are practically giving away their mobile chips at almost zero price, as nobody else wants them, so that might explain why they're being used, and probably allowed Endless to blow the money saved on the expensive case design and packaging (or to just max out any margin). Still, the thing needs ...
by milhouse
Mon Feb 02, 2015 8:41 am
Forum: General discussion
Topic: Raspberry Pi 2
Replies: 161
Views: 24485

Re: Raspberry Pi 2

DougieLawson wrote: And the significance of that and a cruddy El Reg rumour means the square root of sweet FA.
You'll probably find a brand spanking new kernel7.img lurking in those images...
by milhouse
Mon Feb 02, 2015 8:11 am
Forum: General discussion
Topic: Raspberry Pi 2
Replies: 161
Views: 24485

Re: Raspberry Pi 2

I posted previously the supported Pi2 overclock is 1100Mhz, it's actually 1000Mhz.
by milhouse
Mon Feb 02, 2015 7:09 am
Forum: General discussion
Topic: Raspberry Pi 2
Replies: 161
Views: 24485

Re: Raspberry Pi 2

I'm surprised that they decided to increase the power, yet stay below what competitors (i.e. O-droid) offer at the same price point. It's a bit of a numbers game, but the ODROID-C1 is based on the lower-cost Cortex-A5, while the Pi2 is based on the Cortex-A7. According to Wikipedia , the Cortex-A5 ...
by milhouse
Mon Feb 02, 2015 6:07 am
Forum: General discussion
Topic: Raspberry Pi 2
Replies: 161
Views: 24485

Re: Raspberry Pi 2

Using the same picture as The Reg article... it's either a stock image, or... it may be worth confirming they actually have stock.
by milhouse
Mon Feb 02, 2015 5:33 am
Forum: General discussion
Topic: Raspberry Pi 2
Replies: 161
Views: 24485

Re: Raspberry Pi 2

Unfortunately The Register article is littered with errors and poorly worded, leading to mass confusion around the web. The BCM2836 SoC is using four Cortex-A7 processors (ARMv7 with NEON). The minimum/maximum stock speed of the ARM cores is 600MHz/900MHz, but they overclock very nicely - the defaul...
by milhouse
Wed Jan 21, 2015 4:35 pm
Forum: Troubleshooting
Topic: after yesterday's update the i2c clock doesn't work (solved)
Replies: 54
Views: 28774

Re: [SOLVED] after yesterday's update the i2c clock doesn't

That would just be duplicating what's already on github though. https://github.com/raspberrypi/firmware/commits/master True, and while there are users here who read and understand what is posted on github, there are a lot more that don't. However the main point of my post was to somehow ensure the ...
by milhouse
Wed Jan 21, 2015 3:50 pm
Forum: Troubleshooting
Topic: after yesterday's update the i2c clock doesn't work (solved)
Replies: 54
Views: 28774

Re: [SOLVED] after yesterday's update the i2c clock doesn't

Perhaps there should be a "release" thread - no discussion - with details of the changes (and potential problems/solutions) for each release, described in such a way that the user can quickly determine the changes that have occurred since their current kernel was installed. Display the url of this r...
by milhouse
Wed Jan 21, 2015 9:29 am
Forum: Advanced users
Topic: New device tree kernel is in testing
Replies: 356
Views: 75811

Re: New device tree kernel is in testing

Anyway, now that I am using it I can contribute to testing. Yay. :) I suspect the problem with this update has been, and will be, insufficient testing of all the different combinations of hardware and modules (which is not a criticism of the Foundation, as it's an impossible task). Obviously nobody...

Go to advanced search