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by timg236
Fri Feb 28, 2020 2:59 pm
Forum: Troubleshooting
Topic: rpi-eeprom-update on the Pi4 - unusual output?
Replies: 2
Views: 120

Re: rpi-eeprom-update on the Pi4 - unusual output?

It looks like a beta image was installed on that board at some point in the past but the /etc/default/rpi-eeprom-update is pointing at the 'critical' release folder instead
by timg236
Fri Feb 21, 2020 6:21 pm
Forum: Advanced users
Topic: Raspberry Pi4 bootloader - network boot support - BETA
Replies: 65
Views: 18191

Re: Raspberry Pi4 bootloader - network boot support - BETA

The start.elf network stack is largely unchanged from Pi3 and IIRC the timeout for an individual packet was about 1-second which is probably a bit small. It doesn't appear to be configurable but it may be reasonable to increase it. The Pi 4 bootloader as a new network stack with configurable timeout...
by timg236
Fri Feb 21, 2020 4:00 pm
Forum: Advanced users
Topic: Raspberry Pi4 bootloader - network boot support - BETA
Replies: 65
Views: 18191

Re: Raspberry Pi4 bootloader - network boot support - BETA

If you have a UART cable then setting BOOT_UART=1 in the EEPROM configuration might give some useful statistics. On successful boots you could try "vcdbg log msg" to see if there is any suspicious information there. The DHCP option60 and option97 changes are on a dev branch, hopefully they can be re...
by timg236
Thu Feb 20, 2020 6:51 pm
Forum: General discussion
Topic: Sticky: Custom RPI4 Bootloader
Replies: 31
Views: 1482

Re: Custom RPI4 Bootloader

cleverca22 wrote:
Thu Feb 20, 2020 6:32 pm
ok, not everyone needs this kind of thing, but it would enable things like what is being asked in this thread, and enable uefi as an option
Thanks for clarifying, feel free to raise a Github rpi-eeprom issue for this.
by timg236
Thu Feb 20, 2020 6:09 pm
Forum: General discussion
Topic: Sticky: Custom RPI4 Bootloader
Replies: 31
Views: 1482

Re: Custom RPI4 Bootloader

i am at a stage where i can run custom code from the eeprom, which could load more code over the gpio using whatever protocol i want but i cant bring the ddr4 controller online yet (havent had time to look into it) so your limited to 128kb of ram the simplest/fastest option, would be for the pi fou...
by timg236
Thu Feb 13, 2020 5:09 pm
Forum: Raspbian
Topic: Freezing at Rainbow Screen
Replies: 13
Views: 427

Re: Freezing at Rainbow Screen

I believe apt now contains the latest firmware so there's no need to use rpi-update. Although, it's probably exactly the same at the moment.
by timg236
Thu Feb 13, 2020 3:50 pm
Forum: Raspbian
Topic: Freezing at Rainbow Screen
Replies: 13
Views: 427

Re: Freezing at Rainbow Screen

Great news, that's for letting us know
by timg236
Tue Feb 11, 2020 7:53 am
Forum: Raspbian
Topic: Freezing at Rainbow Screen
Replies: 13
Views: 427

Re: Freezing at Rainbow Screen

There’s an rpi-update change since the release which may help reboot issues. I expect that will get rolled into an apt update or new image fairly soon
by timg236
Tue Feb 11, 2020 7:49 am
Forum: Troubleshooting
Topic: Raspberry Pi 4b is not booting after rpi-update.
Replies: 15
Views: 684

Re: Raspberry Pi 4b is not booting after rpi-update.

It might be worth trying over_voltage=1 in config.txt and removing any over clocking settings
by timg236
Tue Feb 11, 2020 7:47 am
Forum: Advanced users
Topic: Alternate /boot/config.txt location
Replies: 1
Views: 155

Re: Alternate /boot/config.txt location

While fiddling with overclocking on one of my spare RPi4, I noticed quite the anomaly and I cant find any documentation on it, but its almost like there's a safe-mode version of config.txt If I put some unsupported overclock settings in config.txt and reboot, the RPi4 will come up with a "clean" co...
by timg236
Thu Feb 06, 2020 9:57 am
Forum: Troubleshooting
Topic: Raspberry Pi 4B – Don't get output video
Replies: 6
Views: 182

Re: Raspberry Pi 4B – Don't get output video

In the NOOBs case you can see it has booted because the red briefly light goes off at about 20 seconds. That’s noobs rebooting into Raspbian. Is this true? The RED led should never go off, as it is an indication of a power failure... :shock: :? It’s under the control of the gpio expander and I thin...
by timg236
Thu Feb 06, 2020 8:36 am
Forum: Troubleshooting
Topic: Raspberry Pi 4B – Don't get output video
Replies: 6
Views: 182

Re: Raspberry Pi 4B – Don't get output video

In the NOOBs case you can see it has booted because the red briefly light goes off at about 20 seconds. That’s noobs rebooting into Raspbian.
Best guess is that it’s a monitor / cable issue. Try the latest Raspbian image and set hdmi_safe_mode in config.txt
by timg236
Fri Jan 31, 2020 11:11 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 513
Views: 158869

Re: Raspberry Pi 4 usb boot?

99% don't give a damn about this feature, and you didn't do your due diligence. In what way is that jamesh's problem? As demonstrated by the actors of almost all vaudeville shows, there is nothing so bad that it can't be made worse. In the present case, my reading of the situation is that USB boot ...
by timg236
Wed Jan 29, 2020 7:31 pm
Forum: Advanced users
Topic: Pi 4 USB disappearing until reboot
Replies: 7
Views: 622

Re: Pi 4 USB disappearing until reboot

Thanks it sounds like a different issue perhaps specific to that USB device. Please could you post “lusb -v” in the good state and in the error state
“sudo lspci -vvv -xxx”
Hopefully I’ve remembered those commands correctly.
by timg236
Wed Jan 29, 2020 10:04 am
Forum: Advanced users
Topic: Pi 4 USB disappearing until reboot
Replies: 7
Views: 622

Re: Pi 4 USB disappearing until reboot

Please can you post the results of "vcgencmd version" then add over_voltage=1, reboot and see if the problem goes away ?
by timg236
Mon Jan 27, 2020 9:25 am
Forum: General discussion
Topic: Shutdown Pi4 but network's yellow+green LED stay active, after today's firmware update?
Replies: 17
Views: 2134

Re: Shutdown Pi4 but network's yellow+green LED stay active, after today's firmware update?

The board is working correctly. Te default HALT state after the launch firmware is idle and not power-off so the Ethernet PHY will be active and automatically do link negotiation and the LEDs will be active.

You need to select POWER_OFF_ON_HALT=1 and WAKE_ON_GPIO=0 ... there's lots of posts on that.
by timg236
Tue Jan 21, 2020 1:34 pm
Forum: Advanced users
Topic: DVFS Firmware
Replies: 85
Views: 11464

Re: DVFS Firmware

https://www.raspberrypi.org/documentation/configuration/config-txt/overclocking.md See v3d_freq, assuming it's actually the 3D you need to be a little bit faster, although that is unclear. Although note that hdmi_enable_4kp60=1 in config.txt will also bump the some stuff in the GPU to 600. Not sure...
by timg236
Tue Jan 21, 2020 7:37 am
Forum: General discussion
Topic: Extra four second delay on Pi4 boot compared to Pi2/Pi3
Replies: 4
Views: 1022

Re: Extra four second delay on Pi4 boot compared to Pi2/Pi3

At the point of this message "Starting start4.elf @ 0xfec00200" the code immediately branches to start.elf so any delay would be in start.elf not the bootloader. start.elf on Pi4 will probably be slower than on Pi2/Pi3 due to extra HDMI, EEPROM reads and some extra file reads for the kernel, althoug...
by timg236
Mon Jan 20, 2020 9:30 am
Forum: Advanced users
Topic: VL805 firmware release 0137ad - fixes for Isochronous streams
Replies: 65
Views: 7816

Re: VL805 firmware release 0137ad - fixes for Isochronous streams

No. I suggest using the flashrom mailing lists. For reference, in the near future, rpi-eeprom will no longer use flashrom or the vl805 utility. They are only there as a staging post until the bootloader can do a self update in network or USB MSD mode. Thanks for clarifying this. Will flashrom usage...
by timg236
Fri Jan 17, 2020 2:10 pm
Forum: Advanced users
Topic: VL805 firmware release 0137ad - fixes for Isochronous streams
Replies: 65
Views: 7816

Re: VL805 firmware release 0137ad - fixes for Isochronous streams

Im not by the pi to run the command but from memory this morning it was the latest in the git repository at the time - 2020-01-09 - Git df0ff18c (BETA) RC3 I know thats been updated since with one with fixed padding - but not made its way to my pi yet This should be fixed in this version if you wan...
by timg236
Fri Jan 17, 2020 11:35 am
Forum: Graphics programming
Topic: Possible to measure time of HDMI output generation based on framebuffer copy?
Replies: 8
Views: 823

Re: Possible to measure time of HDMI output generation based on framebuffer copy?

On Pi3 you can see all of this already in the KMS Kernel driver. A full KMS for Pi4 is under development and will be published in the near future.

(t2 - t1) is effectively zero because the PV starts pulling pixels from HVS during the blanking period.
by timg236
Fri Jan 17, 2020 10:58 am
Forum: Advanced users
Topic: VL805 firmware release 0137ad - fixes for Isochronous streams
Replies: 65
Views: 7816

Re: VL805 firmware release 0137ad - fixes for Isochronous streams

This thread is about feedback for the firmware release, not for reverse-engineering efforts of the programming utility. My apologies. Shall I open a new thread for that? No. I suggest using the flashrom mailing lists. For reference, in the near future, rpi-eeprom will no longer use flashrom or the ...
by timg236
Tue Jan 14, 2020 5:09 pm
Forum: Advanced users
Topic: VL805 firmware release 0137ad - fixes for Isochronous streams
Replies: 65
Views: 7816

Re: VL805 firmware release 0137ad - fixes for Isochronous streams

Thanks to everyone for testing this. The rpi-eeprom package now contains the 0137ad firmware in the beta release directory. Once we are happy with it we'll probably push this release to 'critical' i.e the default image.
by timg236
Fri Jan 10, 2020 9:22 am
Forum: Advanced users
Topic: VL805 firmware release 0137ad - fixes for Isochronous streams
Replies: 65
Views: 7816

Re: VL805 firmware release 0137ad - fixes for Isochronous streams

jdb wrote:
Thu Jan 09, 2020 9:21 pm
Can you update your rpi-eeprom package? A recent fix prevents downgrades.
That fix is only on Github, the Debian package has not been built yet.
by timg236
Mon Dec 09, 2019 3:10 pm
Forum: Troubleshooting
Topic: HDMI settings always 4k even I changed config.txt
Replies: 3
Views: 480

Re: HDMI settings always 4k even I changed config.txt

The monitor is claiming to support 4K so that will end up being the preferred mode. As a quick hack you can filter out modes by pixel-clock e.g. to limit to HD try adding the following to config.txt

hdmi_pixel_freq_limit=200000000

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