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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2035591
Title:
[Mediatek] mt8195-demo: Fix regulator kernel setting are missing:
causes peripheral probe failure for linux (include installer)
Status in linux package in Ubuntu:
Incomplete
Bug description:
1. u-boot: [2023-04-26 14:34:28.294] run distro_bootcmd
2. disable silent mode in grub menu [2023-04-26 14:34:42.196] GNU GRUB
version 2.06
3. boot to Linux
[2023-04-26 14:35:09.115] [ 0.000000] Linux version 6.2.0-18-generic
(buildd@bos02-arm64-039) (aarch64-linux-gnu-gcc-12 (Ubuntu 12.2.0-17ubuntu1)
12.2.0, GNU ld (GNU Binutils for Ubuntu) 2.40) #18-Ubuntu SMP PREEMPT_DYNAMIC
Sun Mar 19 19:49:50 UTC 2023 (Ubuntu 6.2.0-18.18-generic 6.2.6)
[2023-04-26 14:35:09.115] [ 0.000000] Machine model: MediaTek MT8195 demo
board
4. lots of error and driver probing deffered. USB, Ethernet, MMC and
multimedia interfaces.
Ex: [2023-04-26 14:35:22.624] [ 13.808645] platform 1c014000.merge0: deferred
probe pending
5. No ethernet and U-disk could be found
[2023-04-26 14:36:15.548] Unable to find a medium containing a live file
system
[2023-04-26 14:36:15.548] Attempt interactive netboot from a URL?
[2023-04-26 14:36:15.548] yes no (default yes): no
[2023-04-26 14:36:21.432]
[2023-04-26 14:36:21.432]
[2023-04-26 14:36:21.432] BusyBox v1.35.0 (Ubuntu 1:1.35.0-4ubuntu1) built-in
shell (ash)
[2023-04-26 14:36:21.432] Enter 'help' for a list of built-in
commands.
[2023-04-26 14:36:21.432]
[2023-04-26 14:36:21.432] (initramfs) Unable to find a medium containing a
live file system
6. solution:
Compare to generic kernel config for arm64
file: arch/arm64/configs/defconfig
The following settings should be enabled "built-in" in generic kernel
settings.
CONFIG_REGULATOR_MT6357=y
CONFIG_REGULATOR_MT6358=y
CONFIG_REGULATOR_MT6359=y
CONFIG_REGULATOR_MT6360=y
CONFIG_REGULATOR_MT6397=y
7. effected kernel (5.19~latest)
ubuntu kernel for lunar, Kinetic, and Mantic.
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