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by dom
Tue May 30, 2017 4:49 pm
Forum: Troubleshooting
Topic: Problem with rpi-update
Replies: 3
Views: 724

Re: Problem with rpi-update

Should be resolved now (without requiring gawk to be installed).
See: https://github.com/Hexxeh/rpi-update/issues/244
by dom
Tue May 30, 2017 4:42 pm
Forum: Advanced users
Topic: Moving Linux kernel to 4.9
Replies: 289
Views: 93220

Re: Moving Linux kernel to 4.9

See: https://github.com/Hexxeh/rpi-update/issues/244 for info about gawk/mawk. I will remove the gawk specific code in rpi-update once I've confirmed it fixes the issue. I've also asked our packaging guy why many users have mawk rather than gawk installed (I personally have gawk installed, but I gue...
by dom
Thu May 25, 2017 10:16 am
Forum: Beginners
Topic: Is overclocking safe ?
Replies: 16
Views: 2905

Re: Is overclocking safe ?

pi_lover wrote: Application launch time is the same.
Application launch time will significantly affected by sdcard speed.
There is a long thread here.

You want to have high random access 4K read and writes for good performance on a Pi.
by dom
Wed May 24, 2017 2:37 pm
Forum: Beginners
Topic: Is overclocking safe ?
Replies: 16
Views: 2905

Re: Is overclocking safe ?

(theoretically it will reduce the lifespan of the processor, but if the lifespan is predicted to be decades and you lose a year from that would you care?)
by dom
Wed May 24, 2017 2:34 pm
Forum: Beginners
Topic: Is overclocking safe ?
Replies: 16
Views: 2905

Re: Is overclocking safe ?

After 5 years of allowing overclocking I haven't seen a single report of overclocking harming a Pi. So I'd say it is safe.

Of course too high an overclock may crash, and you could lose data due to the crash, so do your experiments after backing up sdcard, or using a clean install.
by dom
Wed May 17, 2017 3:20 pm
Forum: Advanced users
Topic: Raspberry Pi 3 Video decoding
Replies: 13
Views: 15365

Re: Raspberry Pi 3 Video decoding

mp42 is a hacked version of mpeg-4 that pre-dates the standard (see here).
We can't hardware decode these files.
This format is quite old, so typically on SD resolution so can be software decoded using something like Kodi.
by dom
Wed May 17, 2017 11:25 am
Forum: Advanced users
Topic: Raspberry Pi 3 Video decoding
Replies: 13
Views: 15365

Re: Raspberry Pi 3 Video decoding

cjan wrote:is there a way to decode Xvid (.avi) such as w32codecs?
In general xvid is just MPEG-4 and will play fine.
If you have a problem file then post mediainfo - there may be some configuration that isn't supported.
by dom
Tue May 16, 2017 12:17 pm
Forum: Advanced users
Topic: Moving Linux kernel to 4.9
Replies: 289
Views: 93220

Re: Moving Linux kernel to 4.9

Yes, I was talking about the kernel version after the version 4.9. ;) Should I expect any problems with the three newer ones? Well 4.12 is brand new (at rc1 level upstream) so treat that as experimental. 4.10 and 4.11 have no known issues (they have been used in nightly LibreELEC builds for some ti...
by dom
Tue May 16, 2017 10:36 am
Forum: Advanced users
Topic: Moving Linux kernel to 4.9
Replies: 289
Views: 93220

Re: Moving Linux kernel to 4.9

Hallo32 wrote:Hi, are there any plans for the next kernel version the foundation will use?
We've said the next raspbian image will use 4.9.
Are you talking about after that? Too early to say. 4.10, 4.11 and 4.12 are all available if you build yourself.
Raspbian is unlikely to switch away from 4.9 for many months.
by dom
Mon May 15, 2017 11:11 am
Forum: Advanced users
Topic: Raspberry Pi 3 Video decoding
Replies: 13
Views: 15365

Re: Raspberry Pi 3 Video decoding

I updated repos and did a sudo apt get install again, ending up with a kodi version 17.1, build git:20170401-7804a92-dirty and it only plays the sound of that mkv. any idea how to fix it? Did you update the rest of distribution? sudo apt-get update && sudo apt-get dist-upgrade would be recommended ...
by dom
Sat May 13, 2017 12:49 pm
Forum: Advanced users
Topic: Non-root GPIO access broken with 4.9 kernel on Pi1
Replies: 14
Views: 3096

Re: Non-root GPIO access broken with 4.9 kernel on Pi1

my non-working system did not have raspberrypi-sys-mods installed, while my working systems did Do you know why raspberrypi-sys-mods was missing? It should be installed by default on raspbian jessie. Was it manually removed? Did you update from a non-supported version (wheezy)? Some other means of ...
by dom
Fri May 12, 2017 6:50 pm
Forum: Advanced users
Topic: Non-root GPIO access broken with 4.9 kernel on Pi1
Replies: 14
Views: 3096

Re: Non-root GPIO access broken with 4.9 kernel on Pi1

I've tried your test on 4.9 kernel on both pi1 and pi3 and it worked for me. Anyone else tried?
by dom
Fri May 05, 2017 1:55 pm
Forum: Troubleshooting
Topic: Display color issue
Replies: 1
Views: 225

Re: Display color issue

Try "config_hdmi_boost=7". If that doesn't fix it you can increase it up to 11.
by dom
Fri May 05, 2017 11:59 am
Forum: Advanced users
Topic: Moving Linux kernel to 4.9
Replies: 289
Views: 93220

Re: Moving Linux kernel to 4.9

Out of curiosity, is there a mail list or something that pre-announces such kind of branch changes? Threads like this one in the advanced users forum are the usual places where changes are discussed. You can also follow the raspberrypi dev twitter channel where you will see all github commits (but ...
by dom
Wed May 03, 2017 7:09 pm
Forum: General discussion
Topic: Where to buy WD PiDrive
Replies: 5
Views: 894

Re: Where to buy WD PiDrive

I'm using a standard micro-USB cable (i.e. same as used to power Pi) connected to a single USB port on Pi3 without issue.

Note: this is the 314G version, The 1TB version does require more power than the Pi can supply.
by dom
Tue May 02, 2017 7:07 pm
Forum: Advanced users
Topic: HOWTO: Dim the display like the kodi screensaver
Replies: 3
Views: 629

Re: HOWTO: Dim the display like the kodi screensaver

Kodi applies an alpha layer over the screen to dim it. You could get a similar effect by creating a semi-transparent dispmanx layer in front of console framebuffer. Have a look at hello_dispmanx for example code. Make the resource the size of screen and set to black (just remove the FillRect calls)....
by dom
Mon May 01, 2017 11:19 am
Forum: Troubleshooting
Topic: DMT Mode 47 Not Working After Upgrade
Replies: 2
Views: 293

Re: DMT Mode 47 Not Working After Upgrade

I can't think of a reason. Creating an issue here might be best and we can try to track down exactly when it broke:
https://github.com/raspberrypi/firmware/issues
by dom
Sun Apr 23, 2017 11:55 am
Forum: General discussion
Topic: Perf/temp differences between Pi2B V1.1/V1.2 and Pi3B V1.2
Replies: 30
Views: 2979

Re: Perf/temp differences between Pi2B V1.1/V1.2 and Pi3B V1

Edmor wrote:I'm wondering about why Pi2 Model B V1.2 have the same CPU as Pi3 model B V1.2.
Because buying BCM2836 in the very small quantities required for Pi2 is more expensive than slightly increasing the quantity of BCM2837 and using that.
by dom
Tue Apr 18, 2017 12:26 pm
Forum: General discussion
Topic: Perf/temp differences between Pi2B V1.1/V1.2 and Pi3B V1.2
Replies: 30
Views: 2979

Re: Perf/temp differences between Pi2B V1.1/V1.2 and Pi3B V1

i486 wrote:Can I slow down the clock of Pi3 to 900Mhz and avoid overheat problem?
Sure. Add "arm_freq=900" to config.txt and your Pi will run cooler and slower.
by dom
Sun Apr 16, 2017 11:37 am
Forum: Advanced users
Topic: Extra 16M memory on Pi2/Pi3
Replies: 32
Views: 17842

Re: Extra 16M memory on Pi2/Pi3

A friend has bought a pi0W, so lent me his previous 0, which has the camera interface. Reverting to total_mem=1024 seems to be the only setting where pi0 at least tries to display a stream, fixed settings of gpu_ram just giving a black screen. It is unusable like this of course, but interesting non...
by dom
Sun Apr 16, 2017 11:34 am
Forum: Advanced users
Topic: Extra 16M memory on Pi2/Pi3
Replies: 32
Views: 17842

Re: Extra 16M memory on Pi2/Pi3

cjan wrote:in my case Rpi2, kodi need gpu_mem=160 to play hd-dvb youtube 720p-video and better mouse moving...etc.
That won't make any difference for video playback in chromium.

For kodi, then sure, more gpu memory is useful (256MB is recommended for Pi2/Pi3).
by dom
Wed Apr 12, 2017 5:43 pm
Forum: Advanced users
Topic: Extra 16M memory on Pi2/Pi3
Replies: 32
Views: 17842

Re: Extra 16M memory on Pi2/Pi3

If it happens that said buffer is allocated such that its last word is the last word in a a writable allocation of memory (or maybe the last word of actual addressable memory) then certain bitblt operations that involve read-modify-write-back can attempt to touch the next address (part of some opti...
by dom
Wed Apr 12, 2017 4:51 pm
Forum: Advanced users
Topic: Extra 16M memory on Pi2/Pi3
Replies: 32
Views: 17842

Extra 16M memory on Pi2/Pi3

The Pi has a 30-bit (1024MB) address space (the top two bits are used for caching aliases). A small amount of one of the aliases is used for gpu peripheral access. The arm accesses gpu memory space through a coarse MMU that allows 64 blocks of 16M to be mapped in. On Pi0/Pi1 we use 32 of these block...
by dom
Sun Apr 09, 2017 1:05 pm
Forum: Troubleshooting
Topic: OSMC for RPI no longer works
Replies: 14
Views: 3070

Re: OSMC for RPI no longer works

You should report OSMC issues here:
https://discourse.osmc.tv/

NOOBS will just link to an OSMC image hosted by OSMC.
It is possible the latest version of that is bad and they will need to fix it.
But they won't know about it unless they are told.
by dom
Thu Apr 06, 2017 5:29 pm
Forum: Staffroom, classroom and projects
Topic: Stabilizing RPi3 speed for my classes
Replies: 10
Views: 3435

Re: Stabilizing RPi3 speed for my classes

An alternative method would be to change the cpufreq governor which handles the switching to turbo mode: echo powersave | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor powersave mode will run at the lower frequency (600MHz) always. ondemand will dynamically switch performance will r...

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