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by mrdone
Fri Feb 22, 2019 10:27 am
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

Re: Unstable 5Ghz wifi connection on RPi 3B+

bls, thank you for your input. As I stated it earlier, in my case ticking the box Disable DFS Channels in the router settings did the trick. As I can see by now you also have solved the problem, so my congrtulations!
by mrdone
Tue Dec 18, 2018 9:33 pm
Forum: Beginners
Topic: RPi 3b performance in DMIPS compared to other Broadcom SOCs.
Replies: 5
Views: 887

Re: RPi 3b performance in DMIPS compared to other Broadcom SOCs.

@ W. H. Heydt Thanks for the reply! Was away for some time. Correct me if I am wrong. Taking into account that all chips in consideration have Cortex-A53 architecture it seems plausible to assume that for some reason Roy has chosen to report per core results and multiplying them by 4 will give you t...
by mrdone
Sat Dec 15, 2018 10:08 am
Forum: Beginners
Topic: RPi 3b performance in DMIPS compared to other Broadcom SOCs.
Replies: 5
Views: 887

RPi 3b performance in DMIPS compared to other Broadcom SOCs.

As a new year is approaches and probably new RPi 4 is coming I tried to get an idea about how new RPi's processor might look like. Assuming that RPF continues to use Broadcom's SOCs I found the page listing all their chips: https://wikidevi.com/wiki/Broadcom Since we are talking about RPi one should...
by mrdone
Tue Nov 13, 2018 7:54 pm
Forum: Beginners
Topic: Lags in omxplayer after an update
Replies: 0
Views: 194

Lags in omxplayer after an update

After performing an update last Monday (12/11/18), when apt-get offered me to upgrade something like 31 packages, I noticed that omxplayer started to drop frame rate during the playback of video files periodically. If I remember correctly, the majority of updated packages were related to ghost scrip...
by mrdone
Sun Oct 28, 2018 6:24 am
Forum: Beginners
Topic: Chromium 70 on Raspberry Pi
Replies: 3
Views: 1143

Re: Chromium 70 on Raspberry Pi

Pity to hear that. I am extensively using Google services so many things depend on the Google's account, but I will give a try to Vivaldi. I really hope that with production of RPi 4 RPF will abandon support of outdated models and will explore capabilities of modern chips. I doubt that many users no...
by mrdone
Sat Oct 27, 2018 7:51 am
Forum: Beginners
Topic: Chromium 70 on Raspberry Pi
Replies: 3
Views: 1143

Chromium 70 on Raspberry Pi

It takes more than 25 secs to load Gmail on the latest RPi 3B+, while Google Maps are still completely unusable due to the incredible lags. After updating Chrome to v70 on my Win 10 laptop I have an impression that loading time of Gmail has decreased dramatically. Do not ask me why I am not web desi...
by mrdone
Sat Oct 06, 2018 8:11 am
Forum: Beginners
Topic: Cant install Ubutu mate / astroberry
Replies: 4
Views: 322

Re: Cant install Ubutu mate / astroberry

If you happen to have older RPi, e.g. RPi 3b you can take a look at this https://www.raspberrypi.org/forums/view ... 9#p1363177 It worked for me.
by mrdone
Thu Sep 27, 2018 6:32 am
Forum: Other
Topic: Ubuntu Mate 18.04???
Replies: 21
Views: 11947

Re: Ubuntu Mate 18.04???

Copy the contents of /lib/firmware/brcm/ from the latest Raspbian root partition to your Ubuntu Mate root partition. There appear to be ONLY three files which need to be added to Ubuntu to get the WiFi card running on the 3B+. Those are: brcmfmac43455-sdio.bin brcmfmac43455-sdio.clm_blob brcmfmac43...
by mrdone
Tue Sep 25, 2018 7:33 pm
Forum: Other
Topic: Ubuntu Mate 18.04???
Replies: 21
Views: 11947

Re: Ubuntu Mate 18.04???

I started with the "official" Ubuntu Mate 16.04 image and installed it on a Pi 3B. I then did the "sudo BRANCH=stable rpi-update" trick. This allowed the image to run on the Pi 3B+. I had run that for a few weeks, added a few packages etc. I then upgraded that working image to 18.04. The only progr...
by mrdone
Sat Sep 15, 2018 7:27 am
Forum: Beginners
Topic: Volume was not properly unmounted... message at Stretch
Replies: 1
Views: 383

Re: Volume was not properly unmounted... message at Stretch

[SOLVED] It turned out that the dirty flag was set not for boot or root partitions, but for a USB stick. Simple

Code: Select all

sudo umount /dev/sda1
sudo fsck -V /dev/sda1
sudo reboot

Did the job.
by mrdone
Sat Sep 15, 2018 7:10 am
Forum: Beginners
Topic: Volume was not properly unmounted... message at Stretch
Replies: 1
Views: 383

Volume was not properly unmounted... message at Stretch

dmesg command keeps posting "Volume was not properly unmounted. Some data may be corrupt. Please run fsck." To run fsck I used both methods sudo touch /forcefsck; sudo reboot And it seemed to work, but since I got another message in journalctl --since=yesterday urging me instead of creating /forcefs...
by mrdone
Fri Sep 14, 2018 7:39 pm
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

[SOLVED] Unstable 5Ghz wifi connection on RPi 3B+

wolf.z, thank you very much for your elaborated answer. It seems that thanks to your suggestions I have solved the problem! First I tried to disable power save mode, but no luck. Actually, I read somewhere that in recent versions of Raspbian power save mode for wlan is disabled by default even if it...
by mrdone
Fri Sep 14, 2018 12:50 pm
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

Re: Unstable 5Ghz wifi connection on RPi 3B+

@k-pi, probably you should run the test several times to get more accurate numbers. For example, in my case test results were varying between 6Mbps up speed to 10Mbps and I think other equipment on the ISP side was responsible for these fluctuations. @HawaiianPi, I tested my connection with my phone...
by mrdone
Thu Sep 13, 2018 12:53 pm
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

Re: Unstable 5Ghz wifi connection on RPi 3B+

Wow, your results of speedtest-cli are just amazing! When 5Ghz connection works sufficient amount of time without interruption so speedtest-cli has enough time to run I got more moderate results: ~ $ speedtest-cli ... Testing download speed...............................................................
by mrdone
Thu Sep 13, 2018 10:11 am
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

Re: Unstable 5Ghz wifi connection on RPi 3B+

Forgot to mention, my mobile phone with Qualcomm SD 660 has no problem with this 5Ghz network, when it is close to 3B+ or even when it is much further .
by mrdone
Thu Sep 13, 2018 9:41 am
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

Re: Unstable 5Ghz wifi connection on RPi 3B+

k-pi, thanx for the reply! I really need some help here cause currently RPi is my daily driver computer. I am not sure that the problem is with the strength of the signal cause iwconfig shows Link Quality=60/70. However, I think I narrowed down a bit possible causes by looking at the output of journ...
by mrdone
Wed Sep 12, 2018 7:06 pm
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 3891

Unstable 5Ghz wifi connection on RPi 3B+

Recently I bought a new RPi 3B+ and tried to use 5Ghz band to connect it to my router. There was a problem with country settings, since it seems that RPi bans all 5Ghz frequencies when you set country to Russia, so I had to set different country, and currently it is US. With this settings the RPi se...
by mrdone
Tue Sep 11, 2018 1:43 pm
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

HawaiianPi, thank you very much for sharing these results with us. They look cool in both senses of this word ;) Unfortunately, Flirc Gen2 with shipping to my country that I found costed a bit too much, so I have ordered another aluminium case suggested in this thread by RaTTuS at aliexpress and if ...
by mrdone
Mon Sep 10, 2018 7:44 pm
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

bensimmo, thanx for the suggestion! I started to use the script shared by jahboater, which happen to use the commands you have mentioned.
by mrdone
Mon Sep 10, 2018 6:24 pm
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

jahboater, the blessing and the curse of RPi 3B and 3B+ is that they are very close to a decent substitute of a desktop PC. That is why you always want to push it a bit harder to have smoother user experience. For example, I didn't buy RPi to substitute my desktop. I bought it to run some Pyhon scri...
by mrdone
Mon Sep 10, 2018 10:57 am
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

jahboater, cpuburn got my RPi 3B+ to 80C in 70sec and caused it to go down beyond 1200 :? So, I think, the marvelous temps you get a mainly due to the Kintaro heatsink, although I should admit that 3B+ is a step from 3B in right direction. I wonder why foundation doesn't produce heatsinks themselves...
by mrdone
Mon Sep 10, 2018 10:43 am
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

RaTTuS, thanks for a suggestion! Although Kintaro heatsink looks more appealing, it seems that it is out of stock everywhere, so probably I will follow your recommendation :)
by mrdone
Mon Sep 10, 2018 9:46 am
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

Readings from your RPi made me jealous :roll: I've just installed a set of heatsinks that I bought earlier, but even during light browsing temp stays around 55C. What heatsink do you use? And can your share the script you used to measure temp, freq, and voltage? https://images.yaoota.com/tk9z7wAlGRq...
by mrdone
Mon Sep 10, 2018 9:35 am
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

The case looks great, thanx for sharing! Unfortunately, it is not available in my country :?
by mrdone
Mon Sep 10, 2018 9:10 am
Forum: Beginners
Topic: Inconsistency in the performance of RPi 3 B+
Replies: 31
Views: 2635

Re: Inconsistency in the performance of RPi 3 B+

Thanks for a quick reply! I use conky widget to monitor frequency, but during the test it always shows 1.4Ghz , although there certainly were drops in frequency. Given that sysbench sometimes produces very strange results and conky is not very reliable can you recommend a better tools to test RPi's ...

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