Public bug reported: [ Impact ]
* This is a change for hardware enablement. * On the NVIDIA Jetson Orin platforms (Nano, NX, and AGX) installed with candidate Ubuntu for Jetson images (Jammy: https://cdimage.ubuntu.com/nvidia-tegra/ubuntu-server/jammy/daily- preinstalled/), the following warning message is displayed. ``` ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i "unexpected backend.*efi" kern :warn : [ 11.399594] pstore: ignoring unexpected backend 'efi' ``` This is printed by the persistent store kernel module indicating that the system is encountering an EFI-backed pstore, but it is choosing to ignore it, meaning that in our Ubuntu Kernel the `efi_pstore` module is loaded but is not being used. Therefore, explicitly including the following Kernel arguments: `efi_pstore.pstore_disable=1 pstore.backend=ramoops` disables the EFI back end for the `pstore` driver and selects `ramoops` as the active back end for `pstore`. * On the NVIDIA Jetson AGX Thor platforms installed with candidate Ubuntu for Jetson images (Noble: https://cdimage.ubuntu.com/nvidia- tegra/ubuntu-server/noble/daily-preinstalled/), the following warning message is displayed. ``` ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i "efi_pstore.*ramoops" kern :warn : [ 3.399717] pstore: backend 'efi_pstore' already in use: ignoring 'ramoops' ``` Contrary to Jammy, on the Noble Thor platforms, `ramoops` is ignored, meanwhile the `efi_pstore` is used instead. * Setting `efi_pstore.pstore_disable=1 pstore.backend=ramoops` as part of the Kernel command line arguments, on both Jetson Orin and Thor, standardizes the persistent storage for each hardware variant, avoiding the previously mentioned warnings to be displayed. [ Test Plan ] 1. Install the candidate Ubuntu for Jetson image on a Jetson Orin device (Jammy: https://cdimage.ubuntu.com/nvidia-tegra/ubuntu- server/jammy/daily-preinstalled/manual/) and on a Jetson AGX Thor device Noble: (https://cdimage.ubuntu.com/nvidia-tegra/ubuntu- server/noble/daily-preinstalled/manual/). 2. Run the following commands to monitor the `dmesg` on the Jetson Orin device running a Jammy image, the corresponding Kernel warnings will be shown. ``` ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i "unexpected backend.*efi" kern :warn : [ 11.399594] pstore: ignoring unexpected backend 'efi' ``` 3. Run the following commands to monitor the `dmesg` on the Jetson AGX Thor device running a Noble image, the corresponding Kernel warnings will be shown. ``` ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i "efi_pstore.*ramoops" kern :warn : [ 3.399717] pstore: backend 'efi_pstore' already in use: ignoring 'ramoops' ``` 4. Proceed installing the updated "nvidia-tegra-defaults" package on both Orin and Thor, and reboot the devices. 5. Monitor the `dmesg` on the Jetson AGX Orin, Jetson Orin Nano/NX (Jammy), the persistent storage will be standardized, no warnings will be shown, and `ramoops` will be registered as the persistent store back end. ``` ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i efi kern :info : [ 0.000000] efi: EFI v2.70 by EDK II kern :info : [ 0.000000] efi: RTPROP=0x82858e698 TPMFinalLog=0x819060000 SMBIOS=0xffff0000 SMBIOS 3.0=0x8281b0000 MEMATTR=0x82192a018 ESRT=0x8219bdc18 MOKvar=0x8280e0000 TPMEventLog=0x818887018 RNG=0x818a80018 MEMRESERVE=0x819071298 kern :notice: [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.15.0-1020-nvidia-tegra-igx root=UUID=e830c2e7-4f1b-471f-a112-825251b22500 ro fbcon=map:0 video=efifb:off console=ttyAMA0,115200 console=ttyTCU0,115200 console=tty0 quiet splash efi_pstore.pstore_disable=1 pstore.backend=ramoops vt.handoff=7 kern :info : [ 0.010758] Remapping and enabling EFI services. kern :info : [ 0.170597] Registered efivars operations kern :info : [ 2.924927] integrity: Loading X.509 certificate: UEFI:MokListRT (MOKvar table) daemon:info : [ 5.248890] systemd[1]: Starting Load Kernel Module efi_pstore... daemon:info : [ 5.260792] systemd[1]: modprobe@efi_pstore.service: Deactivated successfully. daemon:info : [ 5.261188] systemd[1]: Finished Load Kernel Module efi_pstore. ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i ramoops kern :notice: [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.15.0-1020-nvidia-tegra-igx root=UUID=e830c2e7-4f1b-471f-a112-825251b22500 ro fbcon=map:0 video=efifb:off console=ttyAMA0,115200 console=ttyTCU0,115200 console=tty0 quiet splash efi_pstore.pstore_disable=1 pstore.backend=ramoops vt.handoff=7 kern :info : [ 0.136387] printk: console [ramoops-1] enabled kern :info : [ 0.136391] pstore: Registered ramoops as persistent store backend kern :info : [ 0.136396] ramoops: using 0x200000@0x82cdf0000, ecc: 0 kern :info : [ 2.856872] printk: console [ramoops-1]: printing thread started ``` 6. Monitor the `dmesg` on the Jetson AGX Thor (Noble), the persistent storage will be standardized, no warnings will be shown, and `ramoops` will be registered as the persistent store back end. ``` ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i efi kern :info : [ 0.000000] efi: EFI v2.7 by EDK II kern :info : [ 0.000000] efi: RTPROP=0x1fbb57e218 TPMFinalLog=0x1fac140000 SMBIOS=0xffff0000 SMBIOS 3.0=0x1fbb140000 MEMATTR=0x1fb6111018 ESRT=0x1fb6221798 MOKvar=0x1fbace0000 TPMEventLog=0x1f9a178018 INITRD=0x1fabfb1798 RNG=0x1fa9d98018 MEMRESERVE=0x1fabfb1218 kern :notice: [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.8.0-1013-nvidia-tegra root=UUID=8bee1cfa-ca64-45e7-9eaf-f2e40a47df83 ro fbcon=map:0 video=efifb:off console=ttyAMA0,115200 console=ttyTCU0,115200 console=ttyUTC0,115200 console=tty0 clk_ignore_unused quiet splash vt.handoff=7 efi_pstore.pstore_disable=1 pstore.backend=ramoops kern :info : [ 0.002464] Remapping and enabling EFI services. kern :info : [ 0.043911] efivars: Registered efivars operations daemon:info : [ 3.725682] systemd[1]: Starting modprobe@efi_pstore.service - Load Kernel Module efi_pstore... daemon:info : [ 3.739012] systemd[1]: modprobe@efi_pstore.service: Deactivated successfully. daemon:info : [ 3.739212] systemd[1]: Finished modprobe@efi_pstore.service - Load Kernel Module efi_pstore. kern :info : [ 8.767494] nvidia-modeset: GPU:0: Found active displayID: 0x100 initialized by UEFI on head 0 ubuntu@ubuntu:~$ sudo dmesg --decode | grep -i ramoops kern :info : [ 0.000000] OF: reserved mem: 0x0000001fbf880000..0x0000001fbfa7ffff (2048 KiB) nomap non-reusable ramoops_carveout kern :notice: [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.8.0-1013-nvidia-tegra root=UUID=8bee1cfa-ca64-45e7-9eaf-f2e40a47df83 ro fbcon=map:0 video=efifb:off console=ttyAMA0,115200 console=ttyTCU0,115200 console=ttyUTC0,115200 console=tty0 clk_ignore_unused quiet splash vt.handoff=7 efi_pstore.pstore_disable=1 pstore.backend=ramoops kern :info : [ 4.469340] printk: legacy console [ramoops-1] enabled kern :info : [ 4.469781] pstore: Registered ramoops as persistent store backend kern :info : [ 4.469784] ramoops: using 0x200000@0x1fbf880000, ecc: 0 ``` 7. Confirm that the persisten storage backend is enabled and set by runnig the following command. ``` ubuntu@ubuntu:~$ mount | grep pstore pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) ``` [ Where problems could occur ] * Errors might occur if a user install the updated tegra-defaults package in a platform which does not have Kernel support for `PSTORE_RAM`. ``` ubuntu@ubuntu:~$ grep -i CONFIG_.*PSTORE_RAM.* /boot/config-$(uname -r) CONFIG_PSTORE_RAM=y ``` * No additional problems should happen since this fix only sets the same persistent storage for the Jetson AGX Thor and the Jetson AGX Orin, Jetson Orin Nano/NX devices. [ Other Info ] * The inclusion of these parameters in the Kernel command line was discussed in the following private bug: https://bugs.launchpad.net/riverside/+bug/2121459 ** Affects: nvidia-tegra-defaults (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2142365 Title: [SRU] [Jetson Orin Nano] [Jetson Agx Orin] [Jetson Orin Nx] [Jetson Agx Thor] Issues when selecting the persistent storage on Jetson devices. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-tegra-defaults/+bug/2142365/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
