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by ejolson
Thu Aug 29, 2019 2:22 am
Forum: General programming discussion
Topic: Liberation through Computer Literacy
Replies: 1125
Views: 48720

Re: Liberation through Computer Literacy

At least one of the Python 3 versions uses a completely different optimized library based on the installed Python version. Buster on a Raspberry Pi 4 uses the faster library; maybe the Gentoo version doesn't. So far the prebuilt Gentoo image appears complete, functional and crash free. That is a go...
by ejolson
Wed Aug 28, 2019 11:09 pm
Forum: Networking and servers
Topic: Gigabit Switch for Pi 4
Replies: 14
Views: 895

Re: Gigabit Switch for Pi 4

Am using Elecom EHC-G08PA2-B, with flat CAT6 cables for GbE equipped RPis/SBCs and flat CAT5e for 100MBbps equipped RPis/SBCs. been using for more than 6 months I have now tried that 4B which was not connecting to the Rosewill RC-416 on a different gigabit switch. It connects to a D-Link DGS-1248T ...
by ejolson
Wed Aug 28, 2019 6:18 pm
Forum: General discussion
Topic: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?
Replies: 31
Views: 1376

Re: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?

jamesh wrote:
Wed Aug 28, 2019 5:37 pm
Q. Do you think, if it was possible to have an 8GB device this easily, we would already be selling an 8GB device?
No. From a marketing point of view it would be far too expensive to sell.
by ejolson
Wed Aug 28, 2019 5:04 pm
Forum: General discussion
Topic: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?
Replies: 31
Views: 1376

Re: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?

I suspect someone will do it just because they can. Moderately likely, but it won't be by someone who comes to the forums and asks if it is possible. The person who asks if something is possible may also be willing to pay for someone else to do it. At present, however, I've not seen such an upgrade...
by ejolson
Wed Aug 28, 2019 4:48 pm
Forum: Raspbian
Topic: btrfs-progs in Buster busted for multi-drive disk pools.
Replies: 11
Views: 498

Re: btrfs-progs not working in Buster. Help requested.

ShiftPlusOne wrote:
Wed Aug 28, 2019 3:26 pm
FWIW, my pi syncs its ext4 rootfs to an external btrfs-formatted drive and takes a snapshot nightly. I haven't come across the issue you're describing.
Are you running Raspbian Buster?

What does btrfs --version report?
by ejolson
Wed Aug 28, 2019 4:28 pm
Forum: General discussion
Topic: Raspberry Pi 4 overheat : why not underclocking a little ?
Replies: 24
Views: 1379

Re: Raspberry Pi 4 overheat : why not underclocking a little ?

Well, I get your point about automatic underclocking. If I use the Pi 4 as desktop computer, I’ll probably let it manage its frequency. But my first use will be media center. Currently I have a Pi 2 and it’s wonderfull : it’s switched on 24h a day, it’s always immediately available. And it does not...
by ejolson
Wed Aug 28, 2019 3:14 pm
Forum: Raspbian
Topic: btrfs-progs in Buster busted for multi-drive disk pools.
Replies: 11
Views: 498

Re: btrfs-progs not working in Buster. Help requested.

ShiftPlusOne wrote:
Wed Aug 28, 2019 9:39 am
https://bugs.launchpad.net/raspbian/
The bug has now been added to launchpad. The report is

https://bugs.launchpad.net/raspbian/+bug/1841799
by ejolson
Wed Aug 28, 2019 4:46 am
Forum: General discussion
Topic: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?
Replies: 31
Views: 1376

Re: Can i upgrade LPDDR4 4GB or 8GB form RPi4 (2GB)?

In theory, with the right equipment, yes. In practice, no, unless you have industrial grade rework capability. With previous models 1GB RAM was the limit; with the newer 4B model it is rumored that the board is wired to accommodate 16GB. It would be an interesting option for a third party to do the...
by ejolson
Wed Aug 28, 2019 3:40 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 304
Views: 47493

Re: Raspberry Pi 4 usb boot?

Any ETA when to expect PXE and USB/MS boot on PI4? Would appreciate even the ballpark. No. As has been stated quite a few times already in this thread. It may be important at some point in time for a company to stop pulling rabbits out of a hat and provide a roadmap for future products that busines...
by ejolson
Tue Aug 27, 2019 7:37 pm
Forum: Raspbian
Topic: btrfs-progs in Buster busted for multi-drive disk pools.
Replies: 11
Views: 498

Re: Are btrfs-progs in Buster busted? [Answer: yes]

This post is simply to check whether the maintainer for btrfs-progs in Raspbian Buster has seen this report, or whether an additional bug report needs to be placed somewhere other than on this forum. Any reply would be appreciated.
by ejolson
Tue Aug 27, 2019 5:39 pm
Forum: General discussion
Topic: Using PiServer with Pi 4
Replies: 9
Views: 513

Re: Using PiServer with Pi 4

I think the OP said the premises span over 100.000 m2. How many local networks, over such a surface? Bootp does not go across routers unless you help it a lot. I assume more than a few Pis would be involved. Would a central server scale at reasonable cost? The bigger the deployment the better centr...
by ejolson
Tue Aug 27, 2019 4:38 pm
Forum: General discussion
Topic: Using PiServer with Pi 4
Replies: 9
Views: 513

Re: Using PiServer with Pi 4

Which functionalities are you looking for as part of the management solution? Either way, I wouldn't downgrade to older models because of a lack of support for specific software (PiServer, in your case). I agree. The final deployment should consist of only Raspberry Pi 4B and not a single 3B or 3B+...
by ejolson
Tue Aug 27, 2019 3:34 pm
Forum: General programming discussion
Topic: "build a cross compiler toolchain
Replies: 4
Views: 274

Re: "build a cross compiler toolchain

If you then run into the same error building the kernel, then the problem may lie somewhere besides how the cross-compiler toolchain was configured. Does cross-compiling a kernel require both native and cross compilation to work? You might have better luck trying to run your cross-compiler tool cha...
by ejolson
Tue Aug 27, 2019 3:58 am
Forum: General discussion
Topic: What to do with 4 old sata drives?
Replies: 29
Views: 3942

Re: What to do with 4 old sata drives?

I have 4 old internal 80Gb sata drives, not much value in them, but they're all identical and good quality. So why not build a raid I hear you say! Well, I was thinking the same thing. I've been using using this four bay powered USB 3 enclosure for about a year with an Intel-compatible computer and...
by ejolson
Mon Aug 26, 2019 4:58 pm
Forum: General discussion
Topic: Uses for Raspberry Pi Zero/Zero W?
Replies: 81
Views: 2719

Re: Uses for Raspberry Pi Zero/Zero W?

Think of something like a Pi4 SoC, but cut down to a single (or, at most, two) CPU core and using a smaller core like the A53. The question remains...Who is going to pay for the 7-figure development cost? The RPT generates plenty of profit, multiple 7-figure amounts, and there is likely to be ROI a...
by ejolson
Mon Aug 26, 2019 2:19 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 257
Views: 17427

Re: Why moving to 64bit?

The first 90% of effort on a software project takes the first 90% of the time. The remaining 10% of the effort takes the remaining 90% of the time. The problem with the last 10% taking a disproportionate amount of energy was solved recently by what is called agile methodology: Simply put the code i...
by ejolson
Mon Aug 26, 2019 2:03 pm
Forum: Raspbian
Topic: Buster bug report thread
Replies: 215
Views: 25295

Re: Buster bug report thread

This bug report points out that the package btrfs-progs is busted in Buster, in case you missed the separate thread. Additional details are available here.
by ejolson
Mon Aug 26, 2019 5:24 am
Forum: Off topic discussion
Topic: [Off topic] Why isn't there a decent Android emulator for x86 Linux?
Replies: 8
Views: 1082

Re: Silly question time.

Android is based on an old Linux kernel but it does not use the Linux x11 graphics stack. Most of the Android GPU drivers are blobs from the chip suppliers. The phrase Linux X11 graphics stack seems strange to me, because X11 was created before Linus even entered the university. The first Linux dis...
by ejolson
Sun Aug 25, 2019 10:53 pm
Forum: General discussion
Topic: Uses for Raspberry Pi Zero/Zero W?
Replies: 81
Views: 2719

Re: Uses for Raspberry Pi Zero/Zero W?

It'd be like teaching a kid how to run a marathon, but limiting them to the 100M dash. Did the Romans run to Marathon while wearing flip flops ? How many flip flops are in a Pi Zero? To fully prepare today's students for the future, the next Pi Zero should have an 8-cubit quantum processor. Barring...
by ejolson
Sun Aug 25, 2019 7:17 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 257
Views: 17427

Re: Why moving to 64bit?

Don't count on Raspian 64 bit any time soon. Like the Pi 4B, a 64-bit version of Raspbian may happen sooner than people think. The reason is because it is more and more difficult as time goes on to get software developed for 64-bit to run correctly on 32-bit machines. For example, I just discovered...
by ejolson
Sun Aug 25, 2019 7:01 pm
Forum: Raspbian
Topic: btrfs-progs in Buster busted for multi-drive disk pools.
Replies: 11
Views: 498

Re: Are btrfs-progs in Buster busted?

In the continuing saga of my Pi 4B file server experiment, I have discovered that btrfs from the Raspbian btrfs-progs package can't make snapshots. Note that btrfs version v4.20.1 is included with Raspbian Buster. I compiled the latest btrfs version 5.2.1 from source. The problem persisted. Then I ...
by ejolson
Sun Aug 25, 2019 5:46 pm
Forum: Raspbian
Topic: btrfs-progs in Buster busted for multi-drive disk pools.
Replies: 11
Views: 498

btrfs-progs in Buster busted for multi-drive disk pools.

In the continuing saga of my Pi 4B file server experiment, I have discovered that btrfs from the Raspbian btrfs-progs package can't make snapshots. The result # btrfs sub snap blue_root blue_root-snap ERROR: Could not statfs: Value too large for defined data type seems to indicate that instead of st...
by ejolson
Sun Aug 25, 2019 5:45 pm
Forum: Networking and servers
Topic: Gigabit Switch for Pi 4
Replies: 14
Views: 895

Re: Gigabit Switch for Pi 4

graysky wrote:
Sun Aug 25, 2019 5:28 pm
Cisco SG100-16 works.
That's another good data point. I'm starting to suspect the Pi 4B itself is the problem rather than the Rosewill switch. I'll have more information soon.
by ejolson
Sun Aug 25, 2019 4:17 pm
Forum: Networking and servers
Topic: Gigabit Switch for Pi 4
Replies: 14
Views: 895

Re: Gigabit Switch for Pi 4

I got that TPLink switch off Amazon 2 weeks ago. I have 2 4Bs and my router connected to it and it seems to be working fine. Haven't done any in-depth tests though That's good to know. Unless something turns up to fix the compatibility problems with the switch I have, I'll likely get one. It's inte...
by ejolson
Sun Aug 25, 2019 4:16 pm
Forum: Networking and servers
Topic: Gigabit Switch for Pi 4
Replies: 14
Views: 895

Re: Gigabit Switch for Pi 4

There is a third option: try another cable ;) That said, I'm using a Tenda SG108 (https://tendacn.com/uk/product/SG108.html) without any problems with a variety of Pi including a 4B. I've tried four different cables, all of which work to connect the same switch at gigabit speeds to other computers....

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