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by caldimerda
Thu Jul 18, 2019 9:14 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 screen blanking under high load
Replies: 14
Views: 1589

Re: Raspberry Pi 4 screen blanking under high load

Hi, since I upgraded my older RPi to Rasbian10/Buster, I am getting the exact same issue / stacktrace some time (roughly 20 minutes) after booting. I also can ssh into my RPi and I can even play back videos to the screen via "export DISPLAY=:0" + cvlc. But the regular gui is completely blank and th...
by caldimerda
Wed Jul 17, 2019 2:06 pm
Forum: Troubleshooting
Topic: Is there a Pi 4 Undervoltage warning?
Replies: 5
Views: 700

Re: Is there a Pi 4 Undervoltage warning?

The valid (best) option to test this is by making sure it receives good power, by trying if the official (RPI4) supply solves the mysterious crashes. if not it's not power related. Hi Mahjjong I'm not quite sure I folow your logic. I wasn't asking if an undervoltage issue is causing my issues. I am...
by caldimerda
Sat Jul 13, 2019 8:12 am
Forum: Troubleshooting
Topic: Is there a Pi 4 Undervoltage warning?
Replies: 5
Views: 700

Is there a Pi 4 Undervoltage warning?

Hi I've not seen an undervoltage lightning bolt with my pi 4. I've tried to provoke one by using a low power output supply and it runs happily with no sign of a problem. I ask because I do have a variety of issues with the new pi and on the older devices a lot of problems came down to low voltage. B...
by caldimerda
Thu Jul 11, 2019 6:03 pm
Forum: Raspbian
Topic: Buster bug report thread
Replies: 272
Views: 45921

Re: Buster bug report thread

I have found two issues so far. First is that YouTube stutters heavily in chromium although I believe it is a known issue and there's a patch on the way. Any updates on that would be appreciated! Second is with VLC using a Bluetooth headset. An mp4 will only play the first half a second of sound be...
by caldimerda
Sun Jul 07, 2019 4:44 pm
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

I've got the latest (non-stable) Kernel (via rpi-update) and stcck chromium settings with an additional "--enable-native-gpu-memory-buffers" added to 00-rpi-vars although I don't think that's added anything other than turning the setting green in chrome://gpu (I just can't resist tinkering). I'm no...
by caldimerda
Sun Jul 07, 2019 12:45 pm
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

I tried out some WebGL How fast is the Aquarium example? http://webglsamples.org/ I only got 1fps on Buster/Pi4 but have got 3fps with Pi3B+/Gentoo64. I think even later releases got to 12-15fps? Mostly on my Pi 4 now I'm getting around 11-12 FPS. Sometimes it pops down to 7 or 8 and other times up...
by caldimerda
Sat Jul 06, 2019 4:17 pm
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

TBH, I'm pretty impressed. It plays youtube on my 27 inch monitor pretty well. I can open mpeg files and play them as well, with the audio through my bluetooth speaker. There are issues with other features but they'll get ironed out. I've been in IT for more than 30 years and part of my role now is ...
by caldimerda
Sat Jul 06, 2019 11:35 am
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

Youtube on chrome with apt-get all updated/upgraded unfortunately plays like a slide show here. What am I missing? You need to try sudo rpi-update That gets you the latest Kernel updates. Tehy've not been added to the released kernel yet so you won't get them from apt-get... Then the change mention...
by caldimerda
Fri Jul 05, 2019 7:04 pm
Forum: Troubleshooting
Topic: Turning LCD backlight off on rpi4/buster with dpms
Replies: 12
Views: 1154

Re: Turning LCD backlight off on rpi4/buster with dpms

Yes, DPMS seems to be broken on Pi 4. I don't know about the official screen but even in Jessie & Stretch with a standard HDMI monitor.... DPMS only blanked the screen and did not put the monitor in any form of standby or turn off backlight etc. So xset dpms 600 600 600 was equivalent to xset s 600...
by caldimerda
Fri Jul 05, 2019 7:00 pm
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

Merged yesterday - https://github.com/Hexxeh/rpi-firmware/commit/ee41ed73e89e198aaa84e99bd53c352203d125f8 (only the firmware changes were reverted in the followup commit, and this was a kernel only change). Note that this will not automatically remove the --disable-gpu flag from Chromium. I updated...
by caldimerda
Fri Jul 05, 2019 11:57 am
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

Merged yesterday - https://github.com/Hexxeh/rpi-firmware/commit/ee41ed73e89e198aaa84e99bd53c352203d125f8 (only the firmware changes were reverted in the followup commit, and this was a kernel only change). Note that this will not automatically remove the --disable-gpu flag from Chromium. I updated...
by caldimerda
Fri Jul 05, 2019 10:49 am
Forum: Troubleshooting
Topic: Turning LCD backlight off on rpi4/buster with dpms
Replies: 12
Views: 1154

Re: Turning LCD backlight off on rpi4/buster with dpms

Yes, DPMS seems to be broken on Pi 4. I don't know about the official screen but even in Jessie & Stretch with a standard HDMI monitor.... DPMS only blanked the screen and did not put the monitor in any form of standby or turn off backlight etc. So xset dpms 600 600 600 was equivalent to xset s 600...
by caldimerda
Fri Jul 05, 2019 7:21 am
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

Hi James Thanks for the update. Forgive the daft question but I can't see the Pi now to check for myself - is this in the 4.19 Kernel? Thanks, David We have not released the fix yet, currently being code reviewed. It will go in to the current kernel when ready. Thanks James. That's great. Just want...
by caldimerda
Thu Jul 04, 2019 7:57 pm
Forum: Troubleshooting
Topic: Turning LCD backlight off on rpi4/buster with dpms
Replies: 12
Views: 1154

Re: Turning LCD backlight off on rpi4/buster with dpms

DougieLawson wrote:
Tue Jul 02, 2019 5:40 pm
Try this: https://github.com/DougieLawson/backlight_dimmer
Hi Dougie
With respect, I think this one is a bug. Works on other Pi's, not on a 4. Which seems to point more at the pi than Buster? But I'm not at all where to report a bug?
Thanks
by caldimerda
Thu Jul 04, 2019 11:10 am
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

Depends what you try to do - vidio playback may fail. We found a bug in the CMA memory handling to do with how some DMA was done. This is now fixed internally and currently being tested.Should mean that HW chromium acceleration can be turned on giving very good webGL performance and much improved v...
by caldimerda
Thu Jul 04, 2019 9:53 am
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

It's my understanding that currently the GPU hardware decoding is disabled for in-browser video playback (eg. YouTube) due to some software issue, which is expected to be fixed at some point. It would be interesting to know a little more about that. I re-enabled all the Chromium GPU hardware settin...
by caldimerda
Thu Jul 04, 2019 7:52 am
Forum: General discussion
Topic: Pi 4 firmware, software stability improvements
Replies: 83
Views: 30142

Re: Pi 4 firmware, software stability improvements

Right I’ve seen HD video streams laggy and 4K monitors not smooth, I’m wondering if that’s just because the GPU is not the best, or if 4K was optional but experimental etc, It's my understanding that currently the GPU hardware decoding is disabled for in-browser video playback (eg. YouTube) due to ...
by caldimerda
Fri Jan 13, 2017 2:19 pm
Forum: Troubleshooting
Topic: Kernel error - Pi 3 crashes
Replies: 1
Views: 948

Kernel error - Pi 3 crashes

Hello This is info for anyone who works on the kernel for pi. I'd like to know what happened to the pi but this particular machine does quite a lot and I just want it to remain stable. I had a Pi 3 crash after a few days of running. It happened twice running kernel 4.4.38. I upgraded to 4.4.41 and i...
by caldimerda
Mon Aug 01, 2016 3:41 pm
Forum: Troubleshooting
Topic: Portable Power Bank for Raspberry Pi 3
Replies: 35
Views: 77226

Re: Portable Power Bank for Raspberry Pi 3

Well what do I know. I'd casually glanced at the MagPi graph and somehow arrived at 3A. Oh dear, what is age doing to me?

I'd read about the stepping up. I guess it doesn't matter what the reason is. I'd like a Powerbank that doesn't give me low voltage warnings!
by caldimerda
Mon Aug 01, 2016 9:14 am
Forum: Troubleshooting
Topic: Portable Power Bank for Raspberry Pi 3
Replies: 35
Views: 77226

Re: Portable Power Bank for Raspberry Pi 3

Hi JimmyN I've fallen foul of many RPI power problems, so yes I have checked it's not the cable - because I use the same cable with a power supply and with the power banks. The Powerbank isn't delivering enough current when the RPI 3 does some work. From the MagPi benchmark chart it seems a RPI 3 wi...
by caldimerda
Sun Jul 31, 2016 6:35 pm
Forum: Troubleshooting
Topic: Portable Power Bank for Raspberry Pi 3
Replies: 35
Views: 77226

Re: Portable Power Bank for Raspberry Pi 3

I'd like to know if anyone has an update to this? I would like a power bank with an output port sufficient to power a RPI 3 too. I have an Anker E4 and and EasyAcc 10000 and both will power up the Pi but it throttles on the EasyAcc and even with the Anker it did as soon as even a single processor st...
by caldimerda
Tue Mar 29, 2016 10:26 am
Forum: Troubleshooting
Topic: Image file size
Replies: 2
Views: 501

Re: Image file size

Super answer, ShiftPlusOne. That's done the trick. Created a partition on 3/4's of the card, used writezero and now I have a file just above 4 GB in size. I just need to remember to delete the partition and expand the filesystem each time I go live. Plus, of course, you've explained why the old imag...
by caldimerda
Mon Mar 28, 2016 11:07 am
Forum: Troubleshooting
Topic: HDD Standby hdparm
Replies: 6
Views: 2567

Re: HDD Standby hdparm

I set my drives to prevent them spinning down after reading about issues with drives being constantly "woken" causing the load_cycle_count to rocket. When I first configured my external hard drives (I have 6 now) I did see that variable incrementing a lot. I'd rather use the extra few watts than hav...
by caldimerda
Sat Mar 26, 2016 6:49 pm
Forum: Troubleshooting
Topic: Image file size
Replies: 2
Views: 501

Image file size

I'm stuck for an explanation for the following and I wonder if somebody can help? I have a number of raspi's. They all - until last week - ran a Raspian wheezy build based on the original release, with a lot of apt-get upgrades and installs in the meantime. Each time I make a few changes I save my b...
by caldimerda
Sat Aug 15, 2015 6:35 pm
Forum: Off topic discussion
Topic: Longest Raspberry Pi uptime
Replies: 98
Views: 73176

Re: Longest Raspberry Pi uptime

Running my Java home automation app:

19:32:09 up 626 days, 4:01, 10 users, load average: 0.44, 0.37, 0.34

Alas, moving house again so down she goes.

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