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by timg236
Fri Aug 23, 2019 8:43 am
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 51
Views: 5453

Re: pi 4 32GB sd card doesn't work.

I only attempted the cloned image once. Everything else (including the 64GB card) has been with the downloaded image. It might be worth disabling UHS mode. The bootloader and the firmware run without this so maybe Linux is getting stuck when enabling UHS mode e.g. board problem ? Add "sdhci.debug_q...
by timg236
Thu Aug 22, 2019 10:27 am
Forum: General discussion
Topic: Official Pi 4 firmware download page?
Replies: 9
Views: 988

Re: Official Pi 4 firmware download page?

When the new EEPROM is made official it will be listed on the downloads page with the release notes will will unsurprisingly look pretty much identical to the ones already posted here. https://www.raspberrypi.org/forums/viewtopic.php?f=117&t=246027 Alpha/beta releases and release notes will continue...
by timg236
Thu Aug 22, 2019 10:11 am
Forum: General discussion
Topic: Overclocking RPI4 SDRAM? [not possible!]
Replies: 8
Views: 701

Re: Overclocking RPI4 SDRAM? [not possible!]

The specification is missleading. The SDRAM data rate for Pi4 is 3200 Mbps by default

(vcgencmd measure_clock pllh)
by timg236
Thu Aug 22, 2019 10:04 am
Forum: Raspbian
Topic: Pi 4 with Raspbian Stretch?
Replies: 9
Views: 861

Re: Pi 4 with Raspbian Stretch?

No. The Pi4 requires Buster. To be more accurate, the Pi4 needs the bootcode compatible with it to work. This bootcode is not present in anything except Raspbian Buster and select 3rd party operating systems. For reference, Raspberry Pi4 needs the following files to boot to Linux start4.elf and fix...
by timg236
Wed Aug 21, 2019 7:43 pm
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 51
Views: 5453

Re: pi 4 32GB sd card doesn't work.

Just to double check but if you flash the buster download image rather than the cloned image does that work?
by timg236
Wed Aug 21, 2019 9:06 am
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 51
Views: 5453

Re: pi 4 32GB sd card doesn't work.

The cmdline.txt changes looks correct but /etc/fstab is wrong. You've replaced the mount point instead of the device It should look like this instead /dev/mmcblk0p1 /boot vfat defaults 0 2 /dev/mmcblk0p2 / ext4 defaults,noatime 0 "@timg236 is there anything about this, working, setup on an equivalen...
by timg236
Tue Aug 20, 2019 7:44 am
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 51
Views: 5453

Re: pi 4 32GB sd card doesn't work.

I changed the cmdline.txt to read: "dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=PARTUUID=698e33bd-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait init=/usr/lib/raspi-config/init_resize.sh debug plymouth.ignore-serial-consoles " Upon reboot, here is the video. Note th...
by timg236
Mon Aug 19, 2019 1:20 pm
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 51
Views: 5453

Re: pi 4 32GB sd card doesn't work.

I then used the SDCard Copier to copy from the mmcblk0 to sda. I then safely shut down the pi, , put the 32GB card in the sd card slot and powered on the pi. Same results as I have been having, rainbow, then the raspberries, then dead. The four raspberries indicate that bootloader and start.elf hav...
by timg236
Wed Aug 14, 2019 8:32 pm
Forum: Troubleshooting
Topic: Pi 4 - 3 flashes, "General boot failure"
Replies: 10
Views: 545

Re: Pi 4 - 3 flashes, "General boot failure"

On a Pi4 3 flashes is only triggered by the bootloader if the start.elf file is present but corrupt. Although it's possible, that start.elf has been run and it has raised that error pattern for another reason. It's pretty hard to get that by accident because enough of the system has to be working to...
by timg236
Tue Aug 13, 2019 7:47 am
Forum: Troubleshooting
Topic: pi 4B not showing Video on HDMI0 if memory split set to 896MB
Replies: 23
Views: 1396

Re: pi 4B not showing Video on HDMI0 if memory split set to 896MB

On Pi4 GPU memory now just refers to memory that must addressable to the VPU, HVS, Legacy codecs, and camera. So essentially, it's anything that's part of the HVS composition scene or decoder reference frames. For all practical purposes this memory must be within the bottom 1GB of physical memory. H...
by timg236
Mon Aug 12, 2019 9:26 am
Forum: Raspbian
Topic: Pi4 bootloader / recovery.bin
Replies: 2
Views: 578

Re: Pi4 bootloader / recovery.bin

Please could you use dd or similar to upload a raw disk image of the card in question ? I re-verified the windows behaviour using the following steps and recovery.bin worked as expected. However, it's possible that there could be some subtle difference in the root directory entries 1) Format entire ...
by timg236
Sun Aug 04, 2019 8:00 am
Forum: Troubleshooting
Topic: PI4 red light no boot
Replies: 8
Views: 272

Re: PI4 red light no boot

That would normally indicate an ExFat or NTFS formatted card.
Please try installing Buster using Etcher / other SD card imaging tool
by timg236
Thu Aug 01, 2019 8:44 am
Forum: General discussion
Topic: PI4 doesn't shut down +5V & 3.3V pins after sudo shutdown now
Replies: 11
Views: 669

Re: PI4 doesn't shut down +5V & 3.3V pins after sudo shutdown now

The embedded configuration file is a block of data inside the bootcode. This is inside the bootcode EEPROM or in /boot/bootcode.bin depending on what model you have. For a RPi 4, you need to edit the file and then flash it using the recovery utility or directly using flashrom. It isn't very user fr...
by timg236
Wed Jul 31, 2019 10:59 am
Forum: General discussion
Topic: PI server with Pi 4B
Replies: 2
Views: 203

Re: PI server with Pi 4B

The Pi4 bootloader is documented here

https://www.raspberrypi.org/documentati ... teeprom.md
by timg236
Wed Jul 31, 2019 10:53 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 green light of death
Replies: 13
Views: 1602

Re: Raspberry Pi 4 green light of death

If you have a UART cable then it's possible to view the bootloader progress. See BOOT_UART=1 https://www.raspberrypi.org/documentation/hardware/raspberrypi/booteeprom.md Returned boards do make our way to us for fault analysis but there can be some delay depending on the supplier/shipping etc This i...
by timg236
Wed Jul 31, 2019 8:07 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 green light of death
Replies: 13
Views: 1602

Re: Raspberry Pi 4 green light of death

Btw. A Pi3 start.elf will not run on Pi4 and will also give this behaviour. The bootloader just sees an elf file and loads it. If you upgraded from stretch to buster then you should see start4.elf and fixup4.dat in the boot partition. However if you suspect a hardware fault then a clean buster SD ca...
by timg236
Wed Jul 31, 2019 7:35 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 green light of death
Replies: 13
Views: 1602

Re: Raspberry Pi 4 green light of death

Would it be possible to try a clean buster image on a different SD-card ? It might be SD card incompatibility but we’ve yet to find an SD HC card which doesn’t work on the latest bootloader. It’s just possible that something in the FAT or partition layout has confused it so running chdsk or fsck to ...
by timg236
Wed Jul 31, 2019 7:28 am
Forum: General discussion
Topic: Pi 4 - bootcode.bin only SD boot?
Replies: 4
Views: 370

Re: Pi 4 - bootcode.bin only SD boot?

Pi4 does not use bootcode.bin. The bootloader is loaded from the EEPROM but right now it only supports sdcard boot.
Network boot will be available soon but USB will be later because the USB controller is completely different in Pi4.
by timg236
Tue Jul 23, 2019 4:41 pm
Forum: HATs and other add-ons
Topic: PoE hat, Raspberry Pi 4, not able to power off
Replies: 59
Views: 6581

Re: PoE hat, Raspberry Pi 4, not able to power off

However, one nit: the connection and activity LEDs on the LAN port on the back of the Pi stay lit now, even after shutdown. On the Pi 3 B+ I remember those LEDs would also power off after I shut down the Pi (it was a handy way for me to see if they were truly powered down—since after that 10 green ...
by timg236
Sat Jul 20, 2019 7:50 am
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 97948

Re: Raspberry Pi 4 Thread - general discussion

Pi 4 works flawlessly when I can get it to boot, which is about one out of five tries. It gets far enough to respond to a ping, but not far enough to start sshd (so I can't see where it's gotten stuck). I use an external SSD connected to a USB 3 port for the root device. I've reflashed with the new...
by timg236
Thu Jul 18, 2019 7:05 pm
Forum: Networking and servers
Topic: Does pi4 support Wake On Lan?
Replies: 1
Views: 407

Re: Does pi4 support Wake On Lan?

It’s not supported at the moment. If the hardware (not just the phy) supports it then it would probably be added in the future.
Will check with the hardware engineers!
by timg236
Thu Jul 18, 2019 6:50 pm
Forum: General discussion
Topic: Pi 4 WiFi Troubles
Replies: 13
Views: 1813

Re: Pi 4 WiFi Troubles

Please can you check the output of dmesg to see if there are any Wi-fi or SDIO messages.
It might also be useful to know what channels the access point is using and whether it’s 5ghz
by timg236
Thu Jul 18, 2019 3:07 pm
Forum: General discussion
Topic: RPi 4 : Lost GPIO-3 restart (and fix)
Replies: 27
Views: 4737

Re: RPi 4 : Lost GPIO-3 restart (and fix)

Unless we find any serious problems in the next few days the next version of the bootloader will default to WAKE_ON_GPIO=1. The main reason is that it's not possible to turn of 5V because the the board can be powered via the 5V pin and some HATS don't like having 5V but no 3V3. The halt power off ca...
by timg236
Thu Jul 18, 2019 10:38 am
Forum: Advanced users
Topic: Updated bootloader for Pi4
Replies: 13
Views: 1873

Re: Updated bootloader for Pi4

Conceptually it's the same as the bootcode in the Pi3 ROM, it's just possible to fix stuff after manufacture But something executing autonomously could erase-write it, or parts of it, far more frequently, and one likely only needs to make the smallest part of the Eeprom unusable to bring everything...
by timg236
Thu Jul 18, 2019 8:11 am
Forum: HATs and other add-ons
Topic: Pi4 bootloader update / change to halt behaviour
Replies: 0
Views: 161

Pi4 bootloader update / change to halt behaviour

Apologises for the cross-post but the updated Pi4 bootloader might be of interest to anyone working on HATS. During HALT the default behaviour will be low power mode where 3V3 remains on. It's possible to revert to the previous power-off of the PMIC via an EEPROM config setting https://www.raspberry...

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