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by algorithm
Wed Aug 07, 2019 10:08 am
Forum: Raspbian
Topic: Buster bug report thread
Replies: 196
Views: 17476

Re: Buster bug report thread

1. "vcgencmd get_mem arm" reports 948 MB (plus 76 MB for gpu makes 1 GB) on a Pi 4 with 4 GB.
2. "vcgencmd get_config sdram_freq" is not implemented
by algorithm
Sat Aug 03, 2019 9:34 am
Forum: Troubleshooting
Topic: Pi4 Buster - VNC headless resolution stuck on 1024x768 [SOLVED by manual intervention]
Replies: 5
Views: 198

Re: Pi4 Buster - VNC headless resolution stuck on 1024x768

Wow, huh. Yeah that worked, and fortunately it persists across reboots. Maddeningly, I did open the Screen Configuration tool earlier while trying to resolve this problem and discarded it because it seemed to offer no settings, nothing to interact with. (I had never used or indeed needed it before.)...
by algorithm
Sat Aug 03, 2019 8:38 am
Forum: Troubleshooting
Topic: Pi4 Buster - VNC headless resolution stuck on 1024x768 [SOLVED by manual intervention]
Replies: 5
Views: 198

Pi4 Buster - VNC headless resolution stuck on 1024x768 [SOLVED by manual intervention]

I use all my Pis headless, mostly via ssh and sometimes VNC from my desktop. This always went well; hdmi_force_hotplug=1 in config.txt and set the required resolution with hdmi_group/hdmi_mode according to https://www.raspberrypi.org/documentation/configuration/config-txt/video.md Now I have a shiny...
by algorithm
Wed Jul 31, 2019 8:38 am
Forum: Raspbian
Topic: Buster bug report thread
Replies: 196
Views: 17476

Re: Buster bug report thread

Instead of that HDMI stuff, try framebuffer_width=1920 framebuffer_height=1080 #dtoverlay=vc4-fkms-v3d <--- May or may not need this. Alas, I tried all sorts of combinations with & without hdmi/framebuffer/overlay, but it either gives no window (VNC error "unable to connect to console" or s/t like ...
by algorithm
Tue Jul 30, 2019 11:46 am
Forum: Raspbian
Topic: Buster bug report thread
Replies: 196
Views: 17476

Re: Buster bug report thread

Not sure whether this is Buster or Pi 4. I am trying to use my Pi 4 headless via VNC at 1080p resolution but I get 1024x768. "tvservice -m CEA" does recognise the preferred mode I set in config.txt, but the driver apparently discards that info and invents a new mode that isn't even listed. How do I ...
by algorithm
Mon Jun 03, 2019 1:57 pm
Forum: Camera board
Topic: ENOSPC error but plenty space
Replies: 5
Views: 315

Re: ENOSPC error but plenty space

I bought it a fair while ago (some years), it has worked before, so I don't think it's that. I guess it could be fried by 24/7/365 use as a webcam..., but I thought the error was strange in combination with supported/detected=1, suggesting to me it wasn't the hardware. Haven't had a chance to swap w...
by algorithm
Mon Jun 03, 2019 8:07 am
Forum: Camera board
Topic: ENOSPC error but plenty space
Replies: 5
Views: 315

Re: ENOSPC error but plenty space

I tried to preempt an "rtfm" answer by providing all the info but apparently I failed :) I said I used raspi-config to set up the camera, so yeah, config.txt has gpu_mem=128. The only option the troubleshooting page leaves me is: your hardware is broken. Which is strange because, like I said, vcgenc...
by algorithm
Sat Jun 01, 2019 6:29 pm
Forum: Camera board
Topic: ENOSPC error but plenty space
Replies: 5
Views: 315

ENOSPC error but plenty space

I just did a fresh install of Raspbian Lite on a 8 GB card, updated, installed some stuff (ffmpeg and imagemagick from the repo, some utilities of my own) and now I have still 5.3 GB free (checked via df -h). I also tried "dd if=/dev/urandom of=test.bin bs=1M count=1000" and broke it off when I beca...
by algorithm
Tue Mar 12, 2019 7:33 am
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 74378

Re: 64-bit operating system

My guess is the change might be driven not by speed/addressing requirements (going forward) or backwards hardware compatibility, but software availability. E.g. I see VS Code and Electron are eol-ing their 32-bit support.
by algorithm
Tue Mar 12, 2019 7:19 am
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 74378

Re: 64-bit operating system

- Trig functions are almost always painfully slow. What precision do you need on those, and you may be better using a quick lookup table instead of computing it every time. Symmetry on sine and cosine save you 75% on the lookup table, and implementing one implements the other. In C, per degree: sta...
by algorithm
Wed Mar 06, 2019 7:42 pm
Forum: Raspbian
Topic: wpasupplicant update?
Replies: 10
Views: 7786

Re: wpasupplicant update?

That was my interpretation, too, yes. However, make sure to try it first with a non-headless Pi (screen and keyboard/mouse connected) because for some reason these changes after reboot left my Pi3+ unable to connect to my home network... Very strange, because my router is less than a year old and I'...
by algorithm
Tue Mar 05, 2019 7:17 pm
Forum: Raspbian
Topic: wpasupplicant update?
Replies: 10
Views: 7786

Re: wpasupplicant update?

Thanks. What a mess. I'll have to check if the eduroam network I use sometimes does indeed require tlsv1.0 and level=1.
by algorithm
Tue Mar 05, 2019 6:41 pm
Forum: Raspbian
Topic: wpasupplicant update?
Replies: 10
Views: 7786

wpasupplicant update?

What sort of update is this that downgrades the cypher & security level? wpasupplicant (2:2.6-19) unstable; urgency=medium With this release, wpasupplicant no longer respects the system default minimum TLS version, defaulting to TLSv1.0, not TLSv1.2. If you're sure you will never connect to EAP netw...
by algorithm
Sat Nov 17, 2018 6:53 am
Forum: Raspbian
Topic: Hash mismatch of ps2eps, update fails
Replies: 8
Views: 1404

Re: Hash mismatch of ps2eps, update fails

Thanks very much! Do you know why I always got to that particular mirror, or at least every time I tried? Is the top pick always the shortest path? Would something like "pick a random mirror for the session from the 5 shortest paths" be more robust, for instance? I found it strange that one faulty m...
by algorithm
Fri Nov 16, 2018 5:53 pm
Forum: Raspbian
Topic: Hash mismatch of ps2eps, update fails
Replies: 8
Views: 1404

Re: Hash mismatch of ps2eps, update fails

having a working system is more important. Unless you absolutely need the update, being delayed a short time is not a serious issue. Sure. That's why I waited a week to begin with. Problem is not this single package being slightly (or very) outdated, but the whole "apt upgrade" failing every time b...
by algorithm
Fri Nov 16, 2018 2:43 pm
Forum: Raspbian
Topic: Hash mismatch of ps2eps, update fails
Replies: 8
Views: 1404

Re: Hash mismatch of ps2eps, update fails

I used a temporary workaround: looked at https://www.raspbian.org/RaspbianMirrors and picked another mirror, edited /etc/apt/source.list where I commented out the main mirror redirector and replaced it with my new single mirror address. That worked, so I guess it's a local problem with serverius.net...
by algorithm
Fri Nov 16, 2018 6:43 am
Forum: Raspbian
Topic: Hash mismatch of ps2eps, update fails
Replies: 8
Views: 1404

Re: Hash mismatch of ps2eps, update fails

It still blocks updates. Does someone know what my next step can be to solve this, if it doesn't get solved by the mirror or upstream? How do I force apt to try a different mirror?
by algorithm
Wed Nov 14, 2018 7:56 am
Forum: Raspbian
Topic: Hash mismatch of ps2eps, update fails
Replies: 8
Views: 1404

Hash mismatch of ps2eps, update fails

Hi, (Partially) automated updates of my system failed the last couple of days on a hash mismatch of the ps2eps package on a certain mirror server. It seems it tries the same mirror every time, "serverius.net": Error:41 http://mirror.serverius.net/raspbian/raspbian stretch/main armhf ps2eps armhf 1.6...
by algorithm
Wed Apr 25, 2018 8:50 pm
Forum: General discussion
Topic: Determining 3B board age
Replies: 2
Views: 447

Re: Determining 3B board age

Ah excellent. Thanks!
by algorithm
Wed Apr 25, 2018 2:17 pm
Forum: General discussion
Topic: Determining 3B board age
Replies: 2
Views: 447

Determining 3B board age

Hard to choose which forum, I hope General is OK. I have three model 3B rev 1.2 boards here. Is there a way to determine their age from the outside? Most promising might be the numbers on the back, two lines just below the gpio pins, next to the little QR-code(?) sticker which also has varying numbe...
by algorithm
Tue Mar 13, 2018 2:37 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Using debian multi-arch to install 64bit applications
Replies: 6
Views: 1126

Re: Using debian multi-arch to install 64bit applications

I tried installing a new version of Visual Studio Code from the 64bit download; I forgot if the previous version I had installed was 32 or 64bit and thought, worst case, it would leave me with two side by side versions. But that went completely wrong. All sorts of ":amd64" versions of packages had t...
by algorithm
Sat Feb 24, 2018 9:04 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Upgrade to kernel 4.14?
Replies: 7
Views: 1880

Re: Upgrade to kernel 4.14?

Hm, not as simple as that, after all. An apt-get install of the latest kernel from backports warns that this will delete a loooong list of packages that are apparently incompatible with that kernel version (I did do "apt-get -t stretch-backports upgrade" beforehand which skipped a bunch of packages ...
by algorithm
Fri Feb 23, 2018 12:11 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Upgrade to kernel 4.14?
Replies: 7
Views: 1880

Re: Upgrade to kernel 4.14?

Presuming you are running Debian Stretch with RPD: https://www.raspberrypi.org/downloads/raspberry-pi-desktop/ Then just follow Debian Stretch x86 Blogs like: http://jensd.be/818/linux/install-a-newer-kernel-in-debian-9-stretch-stable Yes, RPD like this forum. Thanks, that will work! Was just curio...
by algorithm
Fri Feb 23, 2018 12:08 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Upgrade to kernel 4.14?
Replies: 7
Views: 1880

Re: Upgrade to kernel 4.14?

Don't ever run rpi-update. It's not needed, it installs untested, experimental kernels and bootcode. If you can't repair an unbootable system in 20 minutes rather than 20 hours the rpi-update isn't for you. Dude, chill on the know-it-all attitude. This is for testing, in a vm, nothing production-li...
by algorithm
Fri Feb 23, 2018 11:34 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Upgrade to kernel 4.14?
Replies: 7
Views: 1880

Upgrade to kernel 4.14?

To my surprise, rpi-update is included, *and* it seems to work, but I guess it doesn't integrate with the desktop startup files and -locations. (Unsurprisingly.) After reboot, still 4.9 and no 4.14 option in grub. My question: rpi-update is not the way to go, right? So how do I upgrade to a kernel l...

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