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by spcharc
Tue Jan 12, 2021 10:18 pm
Forum: Raspberry Pi 400
Topic: Connecting the pi 400 to other computers as just a keyboard?
Replies: 19
Views: 478

Re: Connecting the pi 400 to other computers as just a keyboard?

I think it is possible for a Pi400 to *emulate* a keyboard (I don't have one though). You can do this by emulating a HID device on its usb-c port, if it can do USB gadget mode just like a Pi4.

If your computer has bluetooth you can emulate a bluetooth HID device on its bluetooth interface.
by spcharc
Tue Dec 29, 2020 11:54 pm
Forum: Beginners
Topic: iPhone USB cable as Hotspot - will this work?
Replies: 8
Views: 1233

Re: iPhone USB cable as Hotspot - will this work?

I wonder if I can connect to WiFi network using an iDevice, which shares that connection to a Pi over USB? I know Android can do this without a problem.
by spcharc
Sun Dec 27, 2020 7:05 am
Forum: Troubleshooting
Topic: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+
Replies: 1527
Views: 1470823

Re: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+

Hi spcharc, It is possible when you update the kernel to update the driver for the new kernel before rebooting so the wifi continues to run. Sorry for my late reply. I didn't know I can do wifi-install -u. This can save a lot of work and will try it next time. Currently waiting for a kernel update ...
by spcharc
Thu Dec 24, 2020 1:51 pm
Forum: Troubleshooting
Topic: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+
Replies: 1527
Views: 1470823

Re: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+

Sources I am currently using are:- 8188eu - https://github.com/aircrack-ng/rtl8188eus [branch "v5.3.9"] 8188fu - https://github.com/kelebek333/rtl8188fu [branch "master"] 8192eu - https://github.com/Mange/rtl8192eu-linux-driver [branch "realtek-4.4.x"] 8812au - https:/...
by spcharc
Thu Dec 24, 2020 6:10 am
Forum: Troubleshooting
Topic: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+
Replies: 1527
Views: 1470823

Re: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+

Hi MrEngman, I found the install-wifi script posted by someone in another thread (probably by you? forgot who the person was) It was so easy to use, and helped me a lot. I investigated your script and found your website, and found your username on your website. Thank you very much! Just a quick ques...
by spcharc
Tue Sep 08, 2020 12:26 am
Forum: General discussion
Topic: Veracrypt performance benchmark: Pi4 VS 8-year-old Intel
Replies: 22
Views: 1911

Re: Veracrypt performance benchmark: Pi4 VS 8-year-old Intel

pigod wrote:
Sun Sep 06, 2020 3:03 am
spcharc wrote:
Sat Sep 05, 2020 8:12 pm
The result looks good. I'm wondering what exactly that Intel CPU is?
E3-1230 V2, 4 cores, 8 threads.
Thanks for the info.

Seems it's faster than my i7 laptop CPU. No wonder it looks like 10x faster than pi4
by spcharc
Sat Sep 05, 2020 8:12 pm
Forum: General discussion
Topic: Veracrypt performance benchmark: Pi4 VS 8-year-old Intel
Replies: 22
Views: 1911

Re: Veracrypt performance benchmark: Pi4 VS 8-year-old Intel

The result looks good. I'm wondering what exactly that Intel CPU is?
by spcharc
Wed Aug 12, 2020 4:33 am
Forum: General discussion
Topic: Is Pi4 desktop experience supposed to be this bad?
Replies: 86
Views: 5920

Re: Is Pi4 desktop experience supposed to be this bad?

ejolson wrote:
Wed Aug 12, 2020 3:27 am
would you mind running the Pi pie chart program
I can't run pie chart program but I do have a result found on the internet. I found someone tested using sysbench and concluded that N3350 is 20 times faster than Raspberry Pi 3B.
Link: https://www.amulet.co.jp/shop-blog/?p=8918
by spcharc
Wed Aug 12, 2020 3:57 am
Forum: General discussion
Topic: Is Pi4 desktop experience supposed to be this bad?
Replies: 86
Views: 5920

Re: Is Pi4 desktop experience supposed to be this bad?

ejolson wrote:
Wed Aug 12, 2020 3:27 am
If you have that Celeron N3350 miniPC
No. It's just a random one from Amazon. I don't have it.
by spcharc
Wed Aug 12, 2020 3:05 am
Forum: General discussion
Topic: Is Pi4 desktop experience supposed to be this bad?
Replies: 86
Views: 5920

Re: Is Pi4 desktop experience supposed to be this bad?

In my opinion, if you don't want to play with GPIO, don't buy a Pi. An x86 mini PC is more suitable for you. Let's compare a random mini PC on Amazon [I'm not advertising so let me hide the brand and model] vs Raspberry Pi 4 That mini PC ($120) provides: Case Fan Power supply HDMI cable 64GB interna...
by spcharc
Sat Aug 01, 2020 7:48 am
Forum: General discussion
Topic: RPi4 BCM2711 and ARMv8 Crypto Extensions?
Replies: 61
Views: 9199

Re: RPi4 BCM2711 and ARMv8 Crypto Extensions?

I suspect this is an English language misunderstanding and that the person whom you quote was not predicting it will happen but meant it would be great if it did. At any rate, maybe by then the SM2, SM3 and SM4 standards will have replaced ECDSA, SHA and AES so the whole question will be moot. Ah. ...
by spcharc
Sat Aug 01, 2020 3:55 am
Forum: General discussion
Topic: RPi4 BCM2711 and ARMv8 Crypto Extensions?
Replies: 61
Views: 9199

Re: RPi4 BCM2711 and ARMv8 Crypto Extensions?

As an aside, the performance impact of software AES on full-disk encryption is noticeable while hardware AES is not. I strongly agree. And AES is so widely used. My rpi is running as a server. It encrypts my data before sending to Internet or LAN and the encryption process uses a lot of CPU. It wil...
by spcharc
Thu Jul 30, 2020 3:34 am
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

All of my non-raspberry systems do actually boot with root=UUID=, but they also all boot using initramfs. So the kernel has been given an initial root, and then presumably systemd/udev or whatever are helping to find the real one. Yes. Kernel alone can only deal with PARTUUID. UUID and LABEL need i...
by spcharc
Thu Jul 30, 2020 12:42 am
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

trejan wrote:
Thu Jul 30, 2020 12:23 am
Oops. Sorry.
Thanks for your suggestions anyway.

UUID and LABEL don't work. That's why my title says "how to ensure a fixed /dev/sda". I guess there isn't anything I can do in cmdline.txt
by spcharc
Thu Jul 30, 2020 12:38 am
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

bls wrote:
Thu Jul 30, 2020 12:35 am
My bad. I re-read (slowly) your original post, and missed the subtle point about it actually being your rootfs. Sigh. Apologies.
It's ok. Thank you anyway!
by spcharc
Thu Jul 30, 2020 12:31 am
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

I did read it before I posted, thanks. But, you showed it on the cmdline, not in fstab. My suggestion was to try it in fstab. There may or may not be a difference, but since you're trying to get this working, shouldn't you consider the possibility? Ah, I see. But the problem is when kernel is loade...
by spcharc
Wed Jul 29, 2020 11:55 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

bls wrote:
Wed Jul 29, 2020 10:21 pm
Back on track after that interlude, 'man fstab' says you can use UUID= instead of PARTUUID=. Perhaps try

Code: Select all

UUID=59302f10-4757-4d37-9fa5-1b12e453370a /mnt ext4 defaults,noatime 0 2
Please read the 2nd post. It's another failed attempt ...
by spcharc
Wed Jul 29, 2020 11:54 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

trejan wrote:
Wed Jul 29, 2020 5:52 pm
ext2/3/4 supports labels itself so you can label it using e2label and then put LABEL=rootfs in /etc/fstab and in cmdline.txt
Please read the 2nd post. It's one of the failed attempts ...
by spcharc
Wed Jul 29, 2020 4:31 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

As you can see there is no PARTUUID. It does not even exist. That is because you didn't create a partition table and used the entire drive for your filesystem. Too late now but you needed to have run parted to create the partition table and then create a partition to use. Is there anything importan...
by spcharc
Wed Jul 29, 2020 4:24 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

CaptainMidnight wrote:
Wed Jul 29, 2020 2:57 pm
Please confirm your '/etc/fstab' as the one you showed is only referencing '/dev/sda' - this may change depending on what is plugged in.
I copied and pasted so it's 100% correct
by spcharc
Wed Jul 29, 2020 2:47 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

CaptainMidnight wrote:
Wed Jul 29, 2020 1:29 pm
Hi, have you tried using PARTUUID?
Please look at the "blkid" output in my previous post.

As you can see there is no PARTUUID. It does not even exist.

That's why I cannot use it.
by spcharc
Wed Jul 29, 2020 12:56 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

Re: How to ensure a fixed /dev/sda?

Some hopefully useful information: "lsblk" output: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 931.5G 0 disk / mmcblk0 179:0 0 1.9G 0 disk /boot "blkid" output: /dev/mmcblk0: LABEL_FATBOOT="BOOT" LABEL="BOOT" UUID="9666-55AD" TYPE="vfat&qu...
by spcharc
Wed Jul 29, 2020 12:55 pm
Forum: General discussion
Topic: [Solved] How to ensure a fixed /dev/sda?
Replies: 30
Views: 1572

[Solved] How to ensure a fixed /dev/sda?

Update: Started to use initrd, and issue solved. I'm using a Pi 3B. Currently I have a sdcard that mounts to /boot, which contains all the files required to boot. I also attached an external hdd that mounts to / Raspbian works without any problem when it boots. However, it may fail to boot if severa...
by spcharc
Fri Jul 17, 2020 12:39 am
Forum: Beginners
Topic: Raspberry 4 for Bitcoin mining
Replies: 8
Views: 21103

Re: Raspberry 4 for Bitcoin mining

Unless you attach some mining ASICs (application-specific integrated circuit) to your pi, you will get a super slow mining speed with its CPU. Even ASICs are not that good nowadays because every other serious miners are using ASICs. You really should learn why miners improved their devices in all th...
by spcharc
Thu Jul 16, 2020 10:59 pm
Forum: General discussion
Topic: Poor bluetooth audio quality playing with VLC player
Replies: 3
Views: 383

Re: Poor bluetooth audio quality playing with VLC player

How did you connect your Bluetooth headset to your raspberry pi, i haven't been able to figure it out I just did this: pi@raspberrypi:~ $ bluetoothctl [bluetooth]# scan on Wait until your device appeared (remember to put it into pairing mode) [bluetooth]# pair XX:XX:XX:XX:XX:XX [bluetooth]# connect...

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