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While running an Ubuntu kernel (not a mainline or third-party kernel)
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apport-collect 1954320
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1954320
Title:
Add privacy screen modules to the initrd
Status in linux package in Ubuntu:
Incomplete
Bug description:
Starting with kernel 5.17 the kernel supports the builtin privacy
screens built into the LCD panel of some new laptop models.
This means that the drm drivers will now return -EPROBE_DEFER from
their probe() method on models with a builtin privacy screen when the
privacy screen provider driver has not been loaded yet.
To avoid any regressions Ubuntu should modify its initrd generation
tool to include privacy screen provider drivers in the initrd (at
least on systems with a privacy screen), before 5.17 kernels start
showing up in the Ubuntu repos.
If this change is not made, then users using a graphical bootsplash
(plymouth) will get an extra boot-delay of up to 8 seconds
(DeviceTimeout in plymouthd.defaults) before plymouth will show and
when using disk-encryption where the LUKS password is requested from
the initrd, the system may fallback to text-mode after these 8
seconds.
I've written a patch with the necessary changes for dracut, which
might be useful as an example for how to deal with this, see:
https://github.com/dracutdevs/dracut/pull/1666
ATM the only kms driver using privacy screens is the i915 driver and
the only provider is the thinkpad_acpi driver. But both are likely to
change (and change soon!), so the detection really should be made
dynamic as has been done in the dracut patch.
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