UBUNTU: [Config] FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER=y

BugLink: https://bugs.launchpad.net/bugs/1836858
Impact:

Flickerfree boot doesn't work with Eoan and Focal kernels - the flicker
occurs seemingly during kernel startup following this pattern:

1. BIOS logo on a black background
2. Display mode resets, no image on a black background briefly
3. BIOS logo on a black background

According to upstream, the required kernel option to achieve it (coupled
with the quiet cmdline) is FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER.

Fix:

Apply the config change, recompile and reboot - a test kernel was
provided and the reporter of this bug said "it doesn't completely
solve the issue, but it's a step in the right direction, so please
enable it".

Regression potential:

Low, config change for an option that is upstream.

Proposing for Eoan and Focal.

Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/debian.master/config/config.common.ubuntu b/debian.master/config/config.common.ubuntu
index e93decdd23957215c697e271fa46389f584d909c..212beaae80a0f9c20fb732fb15d8199b40224b23 100644 (file)
--- a/debian.master/config/config.common.ubuntu
+++ b/debian.master/config/config.common.ubuntu
@@ -3310,7 +3310,7 @@ CONFIG_FPGA_MGR_XILINX_SPI=m
 CONFIG_FPGA_MGR_ZYNQMP_FPGA=m
 CONFIG_FPGA_REGION=m
 CONFIG_FRAMEBUFFER_CONSOLE=y
-# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set
+CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER=y
 CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
 CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
 CONFIG_FRAME_POINTER=y