One of the recent proposed changes for Fedora 42 is https://fedoraproject.org/wiki/Changes/PlymouthUseSimpledrm, which switches the driver used for plymouth from the actual GPU's driver to simpledrm. One reason this is planned is because some big drivers (such as AMD's) might time out. However there's is a chance that this change causes a black screen during some part of the boot due to the switch from simpledrm to the actual GPU driver. As per the thread on https://gitlab.freedesktop.org/plymouth/plymouth/-/issues/264#note_2744540 I was suggested to get debug logs from plymouth to report. For reference the system is a Fedora Silverblue 41 VM running on libvirt/QEMU. It's a UEFI system as can be seen on the following excerpt of the XML: ``` <os firmware="efi"> <type arch="x86_64" machine="pc-q35-8.1">hvm</type> <firmware> <feature enabled="yes" name="enrolled-keys"/> <feature enabled="yes" name="secure-boot"/> </firmware> <loader readonly="yes" secure="yes" type="pflash">/usr/share/edk2/ovmf/OVMF_CODE.secboot.fd</loader> <nvram template="/usr/share/edk2/ovmf/OVMF_VARS.secboot.fd">/var/lib/libvirt/qemu/nvram/silverblue_VARS.fd</nvram> <boot dev="hd"/> </os> ``` Kernel parameters are: ``` $ rpm-ostree kargs rhgb quiet root=UUID=<snip> rootflags=subvol=root,compress-force=zstd:1 rw plymouth.use-simpledrm log_buf_len=50M plymouth.debug=stream:/dev/null ostree=<snip> ``` Reproducible: Always Steps to Reproduce: 1. Add `plymouth.use-simpledrm` to the boot arguments 2. Reboot and check the plymouth boot Actual Results: A chunk of the boot is a black screen Expected Results: Flicker free boot
Created attachment 2066824 [details] Plymouth debug logs
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