Raspberry Pi 4 Model B

Aury88

in the 64GB SDcard, after using dd and adding a 33GB partition at the end of the SD Card I have the following kernel panic:

[] No filesystem could mount root, tried:
[] esxt4
[]
[] Kernel panic - not syncing: VFS: Unable to mount root fs on unknow-block(179,2)
[] CPU: 3 PID: 1 Comm:swapped/ Not tained 4.19.73-v8+ #1267
[] Hardware name: Raspberry Pi4 Model B Rev 1.1 (DT)
[] Call trace:
[]  dump_backtrace+0x0/0x178
[]  show_stack+0x24/0x30
[]  dump_stack+0x9c/0xd4
[]  panic+0x130/0x284
[]  mount_block_root+0x228/0x28c
[]  mount_root0x148/0x17c
[]  prepare_namespace+0x178/0x1c0
[] usb 1-1.4:New USB device found, idVendor=04d9,idProduct=1702, bcdDevice= 1.01
[]  kernel_init_freeable+0x328/0x3c0
[]  kernel_init+0x10/0x110
[] usb 1-1.4 : New USB device strings:Mfr=1, Product=2, SerialNumber=0
[]  ret_from_fork+0x10/0x18
[] SMP: stopping secondary CPUs
[] Kernel Offset: disabled
[] CPU features: 0x0,21806000
[] Memory Limit: none
[] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknow-block(179,2) ]---
[] mmc0: Timeout waiting for hardware cmd interrupt.
[] mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
[] mmc0: sdhci: Sys addr:  0x00000008 | Version:  0x00001002
[] mmc0: sdhci: Blk size:  0x00007200 | Blk cnt:  0x00000000
[] mmc0: sdhci: Argument:  0x00020000 | Trn mode: 0x00000023
[] mmc0: sdhci: Present:   0x1fff0000 | Host ctl: 0x00000017
[] mmc0: sdhci: Power:     0x0000000f | Blk gap:  0x00000080
[] mmc0: sdhci: Wake-up:   0x00000000 | Clock:    0x00000107
[] mmc0: sdhci: Timeout:   0x00000005 | Int stat: 0x00000000
[] mmc0: sdhci: Int enab:  0x03ff100b | Sig enab: 0x03ff100b
[] mmc0: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000000
[] mmc0: sdhci: Caps:      0x45ee6432 | Caps_1:   0x0000a525
[] mmc0: sdhci: Cmd:       0x00000d1a | Max curr: 0x00080008
[] mmc0: sdhci: Resp[0]:   0x00000e00 | Resp[1]:  0x01f3ff7f
[] mmc0: sdhci: Resp[2]:   0x325b5900 | Resp[3]:  0x00000900
[] mmc0: sdhci: Host ctl2: 0x00000000 
[] mmc0: sdhci: ADMA Err:  0x00000000 | ADMA Ptr: 0xded3a208
[] mmc0: sdhci: ============================================

Pulsar33

@Aury88
Woooo
Sorry, no more idea to try to help you.
When I'll be home, I'll give you the sha256sum of my image file to be sure that we have the same
Have a nice day
Pulsar33

Aury88

@Pulsar33 NP.
I sacrificed my smartphone 8GB sdcards and whit the UT image it "work". I was able to login and explore the system in console mode. but was not able to see the DE (it says unity8 is running and after restart unity8 nothing change)

Pulsar33

@Aury88
Just back home ... Fine that you were able to explore the system in console mode.
This confirm that 64GB cause problems not only in the case listed in the link above ...
I'll take some time to try graphical mode. I'll report here.

People who know how to launch the graphical mode are welcome to explain here !

BR
Pulsar33

Pulsar33

Sorry but I didn't understand how to launch the graphical user interface.
And with a console mode only, I don't see what to do with it ...
I hope someone will describe the solution.
BR
Pulsar33

Pulsar33

Hello,

Nobody (knows how) is interested in running Ubports in graphical mode on a Raspberry Pi4 ?

Have a nice day
Pulsar33

A Former User

Well I, for one, am following UT on Pi with great interest, @Pulsar33.

I'm still at the "Kernel Panic" stage though, so I can't help much. Sorry.

Pulsar33

Hello,

Thanks for your answer, @3arn0wl

To be sure that we all use the same image, here are the sha256sums of the #8 latest stable build (2019 09 25) I use :
ubuntu-touch-raspberrypi.img.gz febf1ce00e639ae469bf075bce4472b82b25a6d634a147c01d666f1d4f5033c0
ubuntu-touch-raspberrypi.img 76a47458b90702a156e6f9741b448db5e4d0e5235ec177ae4dea9224e4e7e2b5

The flashing process on my Linux Mint 19.2 Desktop :

lsblk   # the SDcard appears as /dev/sdc
umount /dev/sdc1
umount /dev/sdc2
sudo dd bs=4M if=ubuntu-touch-raspberrypi.img of=/dev/sdc status=progress

BR
Pulsar33

Pulsar33

Still no clue from the GURUs ?
Please help us to progress and launch the GUI ...
Best regards
Pulsar33

Aury88

@Pulsar33
Hi!
The unity8 log is very similar to this issue in mir-kiosk. It says there is a workaround but I don't understand what it is....we need to study it and or help from @alan_g

it seems we need to

--env-hacks MIR_MESA_KMS_DISABLE_MODESET_PROBE

when run mir/unity8 but I don't undestand how...

Aury88

also we are using an old rootfs with missing firmwares (last building image is the #8 from 24 September when the firmwares integration in the common rootfs is from 3 October )

alan_g

@Aury88 said in Raspberry Pi 4 Model B:

@Pulsar33
Hi!
The unity8 log is very similar to this issue in mir-kiosk. It says there is a workaround but I don't understand what it is....we need to study it and or help from @alan_g

it seems we need to
--env-hacks MIR_MESA_KMS_DISABLE_MODESET_PROBE
when run mir/unity8 but I don't undestand how...

That's just one way to set an environment variable.

Aury88

@alan_g sorry but I'm not so skilled about bash and linux. so excuse me for the stupid question:
I knew that environment variable had to have a value so something like

ENV_NAME=value

MIR_MESA_KMS_DISABLE_MODESET_PROBE seem only the name...what is its value? is it"true"?

alan_g

@Aury88 said in Raspberry Pi 4 Model B:

@alan_g sorry but I'm not so skilled about bash and linux. so excuse me for the stupid question:
I knew that environment variable had to have a value so something like
ENV_NAME=value
MIR_MESA_KMS_DISABLE_MODESET_PROBE seem only the name...what is its value? is it"true"?

It doesn't need a value, so "true" will be fine (as will "false").

Aury88

no, setting that as an enviroment variable didn't solved the problem... ¯\(ツ)/¯

Pulsar33

Hello
Still stuck in console mode.
Please tell me the commands to try launching the graphical mode, even if this doesn't succeed at this time.
Pulsar33

Aury88

@Pulsar33 it should be in the Ctrl+Alt+F7. unity8 is by default already running in background. you can prove that by typing in the console

start unity8

Also you can restart it with

restart unity8

The problem is that it doesn't seem to work properly because of the mesa-kms missing support in the raspberrypi4 as you can see above
(EGL platform does not support EGL_KHR_platform_gbm extension, Failed to detect whether device /dev/dri/card1 and card2 supports KMS and Couldn't get DRM resources for an Invalid argument)

alan_g

@Aury88 said in Raspberry Pi 4 Model B:

@Pulsar33 it should be in the Ctrl+Alt+F7. unity8 is by default already running in background. you can prove that by typing in the console
start unity8
Also you can restart it with
restart unity8
The problem is that it doesn't seem to work properly because of the mesa-kms missing support in the raspberrypi4 as you can see above
(EGL platform does not support EGL_KHR_platform_gbm extension, Failed to detect whether device /dev/dri/card1 and card2 supports KMS and Couldn't get DRM resources for an Invalid argument)

If that's how you are starting Unity8, then setting the environment variable needs to be done in the launch scripts, not in your terminal session. (Sorry, I don't know enough about how your image is set up to know where these scripts are.)

Aury88

@alan_g i didn't set that variable throught the terminal session but by editing /etc/environment and ~/.bashrc files

alan_g

@Aury88 it might help others help you if you pastebin the Unity8 log.