This bug is awaiting verification that the linux- hwe-5.19/5.19.0-24.25~22.04.1 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy' to 'verification-done-jammy'. If the problem still exists, change the tag 'verification-needed-jammy' to 'verification-failed-jammy'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-hwe-5.19 verification-needed-jammy -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta-riscv in Ubuntu. https://bugs.launchpad.net/bugs/1988984 Title: earlyconsole prints question marks on 5.19.0-1002-generic Status in linux-meta-riscv package in Ubuntu: Fix Released Bug description: earlyconsole prints ������������������������ on 5.19.0-1002-generic [ Impact ] * When adding earlycon to the kernel command line on the SiFive Unmatched board the serial console will print garbage halfway through booting until entering userspace and other other drivers are loaded. * The problem is the UART driver doesn't claim its clocks properly so the PWM driver will turn off the parent clock until PWM is needed for the LEDs on the board. * Compiling the PWM driver as a module so it will be loaded at the same time the LED drivers are loaded is a workaround until the following patch is backported 643792048ee8 ("serial: sifive: enable clocks for UART when probed") * Only the SoCs on the SiFive Unleashed and Unmatched boards use this PWM driver, but none of them need it at boot time, so should be harmless. [ Test Plan ] * Add earlycon and watch the serial console while booting. * Test that PWM leds still work after the PWM driver module is loaded. [ Where problems could occur ] * There might be a hidden dependency on loading the PWM driver early. [ Other Info ] Original bug description: With Kernel 5.19.0-1002-generic on the SiFive Unmatched earlyconsole output looks like: EFI stub: Booting Linux Kernel... EFI stub: Using DTB from configuration table EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path EFI stub: Exiting boot services... ������������������������������������������� With a defconfig 5.19.6 kernel this does not occr. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta-riscv/+bug/1988984/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
