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by jdb
Tue Jul 28, 2020 7:55 am
Forum: Advanced users
Topic: Is hot plugging a microSD electrically safe?
Replies: 13
Views: 768

Re: Is hot plugging a microSD electrically safe?

The kernel drivers definitely have code that polls an empty SD card slot to determine when a card is inserted, so I expect hot-plug is an expected mode of operation. How well it actually works is a different question, as I spent about an hour yesterday looking for one of those tiny cards I had acci...
by jdb
Tue Jul 28, 2020 7:40 am
Forum: General discussion
Topic: Is the 1GbE NIC inside raspberry Pi 4 RSS-capable?
Replies: 6
Views: 391

Re: Is the 1GbE NIC inside raspberry Pi 4 RSS-capable?

The MAC+driver does not support hashing of incoming packets, which are required for flow queues. pi@raspberrypi:/sys/class/net/eth0 $ sudo ethtool -x eth0 Cannot get RX ring count: Operation not supported pi@raspberrypi:/sys/class/net/eth0 $ sudo ethtool -n eth0 Cannot get RX rings: Operation not su...
by jdb
Sun Jul 26, 2020 3:53 pm
Forum: General discussion
Topic: Does Raspberry PI 4 have problems in 2020?
Replies: 45
Views: 3050

Re: Does Raspberry PI 4 have problems in 2020?

mwrich4 wrote:
Sun Jul 26, 2020 3:45 pm
So much help desk time is wasted with uncertainty when the board rev is not updated religiously.
What does this statement mean?
by jdb
Fri Jul 24, 2020 3:39 pm
Forum: General discussion
Topic: Pi4 Quality Control
Replies: 3
Views: 271

Re: Pi4 Quality Control

Thanks. I'll pass it along.
by jdb
Fri Jul 24, 2020 3:09 pm
Forum: General discussion
Topic: Pi4 Quality Control
Replies: 3
Views: 271

Re: Pi4 Quality Control

Please post a picture of the QR code on the white sticker on the underside of the board.
by jdb
Fri Jul 24, 2020 11:39 am
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 164
Views: 143719

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

The drive's mass storage interface has only one alternate setting, and it's Bulk-Only. It lacks SCSI. There's nothing stopping USB mass-storage from being performant - UAS just manages multiple concurrent IO operations better. If you've been flashing firmware images then it's possible you've install...
by jdb
Fri Jul 24, 2020 10:05 am
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 164
Views: 143719

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

Well, there should be nothing preventing a UAS interface from being used if there is one. Does your mass storage device have UAS capability? Please post the output of sudo lsusb -v.
by jdb
Thu Jul 23, 2020 3:45 pm
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 164
Views: 143719

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

Hang on, I looked up the quirks for that device and it's setting BROKEN_FUA not IGNORE_UAS, which should not result in UAS being blacklisted. Your kernel is still selecting usb-storage for the device for some reason. What's the output of uname -a && lsmod?
by jdb
Wed Jul 22, 2020 7:44 pm
Forum: Troubleshooting
Topic: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this
Replies: 164
Views: 143719

Re: STICKY: If you have a Raspberry Pi 4 and are getting bad speeds transferring data to/from USB3.0 SSDs, read this

In your case, the kernel's built-in blacklist probably has an entry for your device. You can override the builtin quirk list by specifying the cmdline.txt parameter without the "u" at the end to "force" use of the UAS interface.
by jdb
Tue Jul 21, 2020 3:44 pm
Forum: Advanced users
Topic: Raspberry Pi 4 disinfecting procedure
Replies: 12
Views: 756

Re: Raspberry Pi 4 disinfecting procedure

I saw a similar question was asked last year without any good reply. Hoping to use raspberry pi in an environment that requires that all equipment is thoroughly cleaned and disinfected (usually by hydrogen peroxide fogging, but alternative procedures are allowed). Can anyone who has knowledge of th...
by jdb
Tue Jul 21, 2020 11:54 am
Forum: General discussion
Topic: Pi 4 - a total failure
Replies: 56
Views: 3313

Re: Pi 4 - a total failure

You have to understand that getting it working is the last thing OP wants. In fact, I am sure he is quite smart enough and quite able enough to get it working if he wanted to (as, in fact, it seems he eventually did). But that's not what he wants. What he wants is to assume his facts, and argue fro...
by jdb
Tue Jul 21, 2020 11:06 am
Forum: General discussion
Topic: Pi 4 - a total failure
Replies: 56
Views: 3313

Re: Pi 4 - a total failure

jamesh I thought you were the moderator. Please refrain from shouting at me. Remember, my main complaint is that as a customer I found this to be a failure. Let me tell you what went wrong to satisfy your query. NOOBS does not work. You said it should but it does not. The system did not boot, the s...
by jdb
Tue Jul 21, 2020 9:23 am
Forum: General discussion
Topic: Pi 4 - a total failure
Replies: 56
Views: 3313

Re: Pi 4 - a total failure

Did you consider that there might be a hardware problem? You mention having used 1B, 2 and 3B before. You didn't have problems with those. So it might be hardware. The no-SD boot test on both the downloads page and booting sticky, which the OP has yet to provide the results of, is a positive proof ...
by jdb
Tue Jul 21, 2020 8:32 am
Forum: General discussion
Topic: Pi 4 - a total failure
Replies: 56
Views: 3313

Re: Pi 4 - a total failure

I looked at the information in this sticky. This was of no help to me. Re: STICKY: Is your Pi not booting? (The Boot Problems Sticky) Report this post Wed Jun 26, 2019 7:39 am This information is written especially for the RPI 4B. It directed me to: https://www.raspberrypi.org/documentation/hardwar...
by jdb
Tue Jul 21, 2020 8:10 am
Forum: Advanced users
Topic: Why do SD cards slow down with too much writing?
Replies: 3
Views: 211

Re: Why do SD cards slow down with too much writing?

Erased flash page exhaustion. h2testw will fill the entire card with data, then when you test it again you're overwriting used flash pages instead of "blank" ones, which means the flash controller needs to perform an erase cycle before you can write to it. A decent flash controller will typically ke...
by jdb
Tue Jul 21, 2020 6:28 am
Forum: General discussion
Topic: Pi 4 - a total failure
Replies: 56
Views: 3313

Re: Pi 4 - a total failure

- any new purchaser should be able to follow the rules and load a NOOBS card, yet it does not work. What rules are these? Or rather, where did you find the instructions to load NOOBS on to a card? Link to them. - about the 4th contribution on the stick quite serendipitously is about the Pi4. It tal...
by jdb
Fri Jul 17, 2020 7:26 pm
Forum: General discussion
Topic: Certificate of Origin-Certificate of Quality
Replies: 4
Views: 256

Re: Certificate of Origin-Certificate of Quality

Also, that documentation page is literally the first result on Google for "raspberry pi compliance certificate":
https://www.google.com/search?client=fi ... ertificate
by jdb
Fri Jul 17, 2020 6:42 am
Forum: Advanced users
Topic: Pi 4 USB3 socket unreliable
Replies: 4
Views: 367

Re: Raspberry Pi 4 VL805 firmware release 0138a1

I am getting poor reliability on port 1 of the USB3 socket. RPI4 8GB v1.4 I am using a FLIRC case, Ive change locations. just no reliability, Port 2 works better. [all] BOOT_UART=0 WAKE_ON_GPIO=1 POWER_OFF_ON_HALT=0 DHCP_TIMEOUT=45000 DHCP_REQ_TIMEOUT=4000 TFTP_FILE_TIMEOUT=30000 ENABLE_SELF_UPDATE...
by jdb
Thu Jul 16, 2020 1:51 pm
Forum: Advanced users
Topic: Raspberry Pi 4 VL805 firmware release 0138a1
Replies: 35
Views: 11147

Re: Raspberry Pi 4 VL805 firmware release 0138a1

The VLI firmware and an updated bootloader are now released as beta rpi-eeprom recovery files:

https://github.com/raspberrypi/rpi-eepr ... 7.16-138a1

OP updated. This means you can now test the VLI firmware on 8GB / v1.4 Pi 4s.
by jdb
Mon Jul 13, 2020 2:32 pm
Forum: Advanced users
Topic: Raspberry Pi 4 VL805 firmware release 0138a1
Replies: 35
Views: 11147

Re: Raspberry Pi 4 VL805 firmware release 0138a1

Offtopic posts will be deleted without warning.
by jdb
Mon Jul 13, 2020 1:49 pm
Forum: Advanced users
Topic: Raspberry Pi 4 VL805 firmware release 0138a1
Replies: 35
Views: 11147

Re: Raspberry Pi 4 VL805 firmware release 0138a1

Why isn't this firmware showing up on https://github.com/raspberrypi/rpi-eeprom/tree/master/firmware And I am also confused to see the same "critical" !?!? (finally released) vl805 firmware under each branch (beta/stable/critical) of the github firmware tree. :? I'd say the 0138a1 would belong into...
by jdb
Mon Jul 13, 2020 1:09 pm
Forum: General discussion
Topic: I broke my raspberry pi4b board ?
Replies: 16
Views: 739

Re: I broke my raspberry pi4b board ?

redpavlo wrote:
Sun Jul 12, 2020 11:25 pm
I found information on the web ...
The right path with two resistors is a wifi antenna.
The left path with two resistors is a bluetooth antenna.
Where did you find this "information"? Please provide a link.

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