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by ehem
Wed Jan 15, 2020 6:25 am
Forum: Bare metal, Assembly language
Topic: Status of U-Boot Support for Pi 4
Replies: 12
Views: 2373

Re: Status of U-Boot Support for Pi 4

There are a few OSes that already use U-boot on the pi. Whenever I come across it in an OS I am converting to NOOBS or PINN, I have to strip it out and revert to the standard bootloader because it prevents multi-boot. Actually, could you list these? They may be valuable as samples for figuring out ...
by ehem
Wed Jan 15, 2020 12:36 am
Forum: Bare metal, Assembly language
Topic: Status of U-Boot Support for Pi 4
Replies: 12
Views: 2373

Re: Status of U-Boot Support for Pi 4

There are a few OSes that already use U-boot on the pi. Whenever I come across it in an OS I am converting to NOOBS or PINN, I have to strip it out and revert to the standard bootloader because it prevents multi-boot. It seems U-boot needs to exist on the first partition and all partition reference...
by ehem
Tue Jan 14, 2020 11:12 pm
Forum: General discussion
Topic: Can read from, but can't write to USB drive
Replies: 19
Views: 596

Re: Can read from, but can't write to USB drive

Is there not a better format for the drive that will be cross-compatible with the Mac and the RPi? Yes, there is. UDF . Support varies from OS to OS, but most OSes have at least read support. Only very recent versions of the Linux UDF Tools include a `fsck` program which is worrisome for data integ...
by ehem
Tue Jan 14, 2020 2:42 am
Forum: Bare metal, Assembly language
Topic: Status of U-Boot Support for Pi 4
Replies: 12
Views: 2373

Re: Status of U-Boot Support for Pi 4

I'm guessing Raspberry Pi4Bs are officially supported by U-Boot? I'm guessing based upon how long ago this discussion was and how recently the referred repositories were updated. Sounds like all (at least most ) of the support is present in the main U-Boot repository ( GitHub being a mirror)? Looks ...
by ehem
Tue Jan 14, 2020 12:38 am
Forum: Advanced users
Topic: Using a Pi as an X-server for another computer.
Replies: 6
Views: 441

Re: Using a Pi as an X-server for another computer.

It should be some simple configuration, to get the Pi to act this way, does anyone know how to go about this? Anyone know how you would start? The "old school" way is to allow remote xclients to access the Pi's xserver via tcp... There are newer (more secure) ways that use other protocols but to ge...
by ehem
Mon Jan 13, 2020 11:14 pm
Forum: General discussion
Topic: Can read from, but can't write to USB drive
Replies: 19
Views: 596

Re: Can read from, but can't write to USB drive

To get more data about a GPT disk you can't use fdisk. You need to use sudo sfdisk -l /dev/sda The program most often present as /sbin/fdisk is not the olde `fdisk` program you're used to. In fact the program most likely in /sbin/fdisk shares much of its core source with `sfdisk`. The modern Linux ...
by ehem
Sun Dec 22, 2019 6:47 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 513
Views: 151919

Re: Raspberry Pi 4 usb boot?

usb-boot works equally well on the Raspberry Pi 1, 2, 3, and 4. I'm pretty sure that has its own built-in assumptions which can be broken. For example if someone is trying to use the UEFI as a second-stage, then chaining to GRUB (there are things which can easily be done with GRUB which I rather do...
by ehem
Sun Dec 22, 2019 6:08 pm
Forum: Debian
Topic: Modules for 4.19 on RP4?
Replies: 1
Views: 436

Re: Modules for 4.19 on RP4?

I was originally asking this in the hope my project could be workable with a kernel close to a generic Debian kernel plus a few patches. Then I looked at the git history of the relevant kernel source code. The Raspbian kernel closely follows Greg Kroah-Hartman's branch, this is the official 4.19.89 ...
by ehem
Sun Dec 22, 2019 5:53 pm
Forum: General discussion
Topic: Raspberry Pi 3B+ and arm processor security
Replies: 9
Views: 572

Re: Raspberry Pi 3B+ and arm processor security

Yeah, this only becomes a problem when EL2 or 3 are used. Until then nothing to worry about. A hypervisor could be compromised this way. Very first sentence "Multiple people on here have been experimenting with hypervisors (notably Xen)." The paper was talking about a RP3, but the same concern exis...
by ehem
Sun Dec 22, 2019 5:42 pm
Forum: General discussion
Topic: RPi4 implementation progress/status
Replies: 7
Views: 737

Re: RPi4 implementation progress/status

With regard to DPMS powerdown, since the power down via monitor works OK (i.e. Huge majority of monitors power down when the HDMI shuts down which is how it currently works), I doubt I will spend much/any time on working out how to do DPMS power down. Waiting for it would be inadvisable. What I was...
by ehem
Tue Dec 17, 2019 2:28 am
Forum: General discussion
Topic: RPi4 implementation progress/status
Replies: 7
Views: 737

Re: RPi4 implementation progress/status

I suspect each person has a distinct list of things they're waiting on from the RPF. Mine include: USB(3) boot DPMS powerdown Information on RP4 v1.2 differences Roughly in order of priority I'm looking for them. While the last will be interesting news, USB3 booting makes a distinctly larger differe...
by ehem
Tue Dec 17, 2019 2:15 am
Forum: General discussion
Topic: Raspberry Pi 3B+ and arm processor security
Replies: 9
Views: 572

Re: Raspberry Pi 3B+ and arm processor security

When you already have EL1 privileges (kernel) you can do everything you want anyway including manipulating the files on the boot partition. Everything higher than EL1 is not used as far as i know and there is no chain of trust at all. So it's not very secure in the first place. Multiple people on h...
by ehem
Fri Dec 13, 2019 6:23 am
Forum: Debian
Topic: Modules for 4.19 on RP4?
Replies: 1
Views: 436

Modules for 4.19 on RP4?

Is anyone using the generic 4.19 arm64 kernel on a Raspberry PI 4? Could you list which modules are being loaded to drive the on-board SDHC/MMC hardware?

I'm experimenting with a rather unusual setup on a closely related variant and as a result retrieving that information is a bit tricky...
by ehem
Wed Dec 11, 2019 12:51 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

cjan wrote:
Wed Dec 11, 2019 12:40 am
so, after a lot of discuss, does v1.2 exist?
and, whats improve?
To the first, "yes". To the second, presently unknown.
by ehem
Thu Dec 05, 2019 10:41 pm
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

The Raspberry PI 4B-4GB bought at MicroCenter on Sunday appears to be the v1.2 board. Why not just ask the operating system what board you're running. grep -i 'revision' /proc/cpuinfo then decode the revision number (heres a clue: the last digit is the version) cat /sys/firmware/devicetree/base/mod...
by ehem
Thu Dec 05, 2019 6:32 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

The last bit of hardware has shown up and now I'm starting towards my project. The Raspberry PI 4B-4GB bought at MicroCenter on Sunday appears to be the v1.2 board. I took pictures, but not being on any of the big photo-sharing sites (nor steal-your-face Book) I don't have a handy place to stash the...
by ehem
Wed Dec 04, 2019 2:46 am
Forum: Debian
Topic: Guide: Installation of *VANILLA* Debian 10.0 or later on Pi 3B/3B+
Replies: 26
Views: 8060

Re: Guide: Installation of *VANILLA* Debian 10.0 or later on Pi 3B/3B+

So I should sue if anything it works at all? :D

I was wondering whether bug reports were desired this early. I imagine you already know about many present problems. Until USB3 support is at least semi-working the main phase of my project will be blocked.
by ehem
Wed Dec 04, 2019 2:42 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

One (serial 84349855) is c03111, the other (serial 23C20032) is C03112 This stating that you personally have one in hand? Merely analyzing what the prior poster typed? If you're confirming then we've got a confirmation from a long-term registered user. The previous poster was new here, though they ...
by ehem
Mon Dec 02, 2019 2:02 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

The moral of the story? Certainly whatever HDMI does it can radiate EMI that cripples WiFi. Do not trust cheap shitty HDMI cables. This is true. I've got this one long and really thin HDMI cable. I'm actually astonished it manages to handle 1920x1080, but that it does. For the moment it serves unti...
by ehem
Mon Dec 02, 2019 1:40 am
Forum: General discussion
Topic: Raspberry Pi 4 USB 3.0 HUB/extension board?
Replies: 6
Views: 2042

Re: Raspberry Pi 4 USB 3.0 HUB/extension board?

HawaiianPi wrote:
Sat Jul 20, 2019 8:34 am
Not all USB 3.0 hubs work on a Raspberry Pi. Look for hubs that specify Linux compatibility, and hope for the best.
Do USB 3 hubs which aren't Linux compatible exist? I thought such would be similar to USB2 hubs which are standard.
by ehem
Sun Dec 01, 2019 2:45 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

I have a vague recollection of remarks indicating that the initial order (and, thus, the expected demand distribution) was something like 1:3:1 across the 1, 2, and 4GB models, respectively. Have you seen any numbers for actual demand? Guessing the 4GB model had massively greater demand than expect...
by ehem
Sun Dec 01, 2019 2:38 am
Forum: Debian
Topic: Guide: Installation of *VANILLA* Debian 10.0 or later on Pi 3B/3B+
Replies: 26
Views: 8060

Re: Guide: Installation of *VANILLA* Debian 10.0 or later on Pi 3B/3B+

Work is under way to extend this to the Raspberry Pi 4. There is a Pi Four Task Force which is one of the people working on this. As of today it wasn't even building for me, manages to create Dsdt.iiii, but fails to compile that. I distinctly like this approach since even though UEFI is pretty awful...
by ehem
Mon Nov 25, 2019 6:24 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: 81
Views: 52952

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

Has anyone tested devices with the JMicron JMS583 chip? When looking at mSATA and NVMe adapters I kept finding lots of them with this chip in them, but given JMicron's reputation.
by ehem
Mon Nov 25, 2019 6:17 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 283
Views: 34075

Re: New Pi 4B v1.2?

fully powering down the Ethernet interface due to the potential presence of PoE. Interesting, I have noticed when I shutdown, after the uSD has finished being written the Ethernet Leds are still flickering. Could 1.2 have something to do with Ethernet booting and wake on Ethernet? This is the thing...
by ehem
Mon Nov 25, 2019 5:32 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 513
Views: 151919

Re: Raspberry Pi 4 usb boot?

I certainly hope you mean filesystem UUIDs. In order to have the same PARTUUIDs you would either have to copy a GPT or deliberately copy the UUID. The former is sort of sane to do, except I would then imagine you would do a major resizing at which point you really should generate a new UUID while y...

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