On 10/28/25 3:09 AM, Francesco Valla wrote:
Hi,
On Monday, 27 October 2025 at 18:19:12 Maxime Ripard <[email protected]> wrote:
On Mon, Oct 27, 2025 at 11:31:06AM -0500, Mario Limonciello wrote:
On 10/27/25 11:28 AM, Maxime Ripard wrote:
On Mon, Oct 27, 2025 at 11:01:55AM -0500, Mario Limonciello wrote:
On 10/27/25 7:35 AM, Thomas Zimmermann wrote:
- a very simple progress bar, which can be driven through sysfs;
Once you have options to control these settings from user space, you
should do it in user space entirely. As Maxime suggested, please improve
plymouth for anything with animation.
- a static image (optional).
Board vendors often provide an image, see /sys/firmware/acpi/bgrt/. This
is a candidate for display, or the penguin or a custom image. Please
make it configurable by Kconfig. Again, if you need policy and
heuristics for deciding what to display, you better do this in user
space.
I'd actually argue that the static image from BGRT should be the preferred
priority. This can make for a nice hand off to Plymouth.
The (UEFI) BIOS already will show this image as soon as the GOP driver is
loaded. Bootloaders like GRUB by default will avoid showing anything or
will overwrite with the exact same image in the same location. This can let
the kernel do the same, and then the moment Plymouth takes over it could do
the same.
And BGRT isn't typically found on embedded systems at all, so I'm not
sure it's a sensible default, let alone a priority. At most a possible
There are certainly embedded machines using UEFI and that have a BGRT.
Yes, indeed, hence the "typically".
How about "Sensible default the top of the priority list if it exists"
How about we don't tell contributors what their priorities must be?
Maxime
I'm not familiar at all with BGRT, I'll study a bit about it.
A build-time configuration could then let the user select:
- a plain solid color
- a custom static image
- the penguin logo (?)
- (on UEFI systems) BGRT source
Thanks!
What I had in mind (which feel free to disagree - it's an RC afterall):
User can pick one of these:
CONFIG_SPLASH_IMAGE
CONFIG_SPLASH_COLOR
If user picks CONFIG_SPLASH_IMAGE then the default behavior would be
UEFI BGRT with a fallback to a Linux penguin.
Additionally there could be a
CONFIG_SPLASH_CUSTOM_IMAGE
This would populate the path to a custom image at build time.
If user picks this then it would override both UEFI BGRT and Linux penguin.
Thank you
Regards,
Francesco
