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Hibernation and resume from sleep support in Kernel

andrew@eb8440p:~$ ate search linux-image
i linux-image-4.19.0-6-amd64 - Linux 4.19 for 64-bit PCs (signed) p linux-image-4.19.0-6-amd64-dbg - Debug symbols for linux-image-4.19.0-6-amd64 p linux-image-4.19.0-6-amd64-unsigned - Linux 4.19 for 64-bit PCs p linux-image-4.19.0-6-cloud-amd64 - Linux 4.19 for x86-64 cloud (signed) p linux-image-4.19.0-6-cloud-amd64-dbg - Debug symbols for linux-image-4.19.0-6-cloud-amd64 p linux-image-4.19.0-6-cloud-amd64-unsigned - Linux 4.19 for x86-64 cloud p linux-image-4.19.0-6-rt-amd64 - Linux 4.19 for 64-bit PCs, PREEMPT_RT (signed) p linux-image-4.19.0-6-rt-amd64-dbg - Debug symbols for linux-image-4.19.0-6-rt-amd64 p linux-image-4.19.0-6-rt-amd64-unsigned - Linux 4.19 for 64-bit PCs, PREEMPT_RT p linux-image-4.19.0-8-amd64 - Linux 4.19 for 64-bit PCs (signed) p linux-image-4.19.0-8-amd64-dbg - Debug symbols for linux-image-4.19.0-8-amd64 p linux-image-4.19.0-8-amd64-unsigned - Linux 4.19 for 64-bit PCs p linux-image-4.19.0-8-cloud-amd64 - Linux 4.19 for x86-64 cloud (signed) p linux-image-4.19.0-8-cloud-amd64-dbg - Debug symbols for linux-image-4.19.0-8-cloud-amd64 p linux-image-4.19.0-8-cloud-amd64-unsigned - Linux 4.19 for x86-64 cloud p linux-image-4.19.0-8-rt-amd64 - Linux 4.19 for 64-bit PCs, PREEMPT_RT (signed) p linux-image-4.19.0-8-rt-amd64-dbg - Debug symbols for linux-image-4.19.0-8-rt-amd64 p linux-image-4.19.0-8-rt-amd64-unsigned - Linux 4.19 for 64-bit PCs, PREEMPT_RT p linux-image-5.4.0-0.bpo.2-amd64 - Linux 5.4 for 64-bit PCs (signed) p linux-image-5.4.0-0.bpo.2-amd64-dbg - Debug symbols for linux-image-5.4.0-0.bpo.2-amd64 p linux-image-5.4.0-0.bpo.2-amd64-unsigned - Linux 5.4 for 64-bit PCs p linux-image-5.4.0-0.bpo.2-cloud-amd64 - Linux 5.4 for x86-64 cloud (signed) p linux-image-5.4.0-0.bpo.2-cloud-amd64-dbg - Debug symbols for linux-image-5.4.0-0.bpo.2-cloud-am p linux-image-5.4.0-0.bpo.2-cloud-amd64-uns - Linux 5.4 for x86-64 cloud p linux-image-5.4.0-0.bpo.2-rt-amd64 - Linux 5.4 for 64-bit PCs, PREEMPT_RT (signed) p linux-image-5.4.0-0.bpo.2-rt-amd64-dbg - Debug symbols for linux-image-5.4.0-0.bpo.2-rt-amd64 p linux-image-5.4.0-0.bpo.2-rt-amd64-unsign - Linux 5.4 for 64-bit PCs, PREEMPT_RT p linux-image-5.4.0-0.bpo.3-amd64 - Linux 5.4 for 64-bit PCs (signed) p linux-image-5.4.0-0.bpo.3-amd64-dbg - Debug symbols for linux-image-5.4.0-0.bpo.3-amd64 p linux-image-5.4.0-0.bpo.3-amd64-unsigned - Linux 5.4 for 64-bit PCs p linux-image-5.4.0-0.bpo.3-cloud-amd64 - Linux 5.4 for x86-64 cloud (signed) p linux-image-5.4.0-0.bpo.3-cloud-amd64-dbg - Debug symbols for linux-image-5.4.0-0.bpo.3-cloud-am p linux-image-5.4.0-0.bpo.3-cloud-amd64-uns - Linux 5.4 for x86-64 cloud p linux-image-5.4.0-0.bpo.3-rt-amd64 - Linux 5.4 for 64-bit PCs, PREEMPT_RT (signed) p linux-image-5.4.0-0.bpo.3-rt-amd64-dbg - Debug symbols for linux-image-5.4.0-0.bpo.3-rt-amd64 p linux-image-5.4.0-0.bpo.3-rt-amd64-unsign - Linux 5.4 for 64-bit PCs, PREEMPT_RT p linux-image-amd64 - Linux for 64-bit PCs (meta-package) p linux-image-amd64-dbg - Debugging symbols for Linux amd64 configuration (met p linux-image-amd64-signed-template - Template for signed linux-image packages for amd64 p linux-image-cloud-amd64 - Linux for x86-64 cloud (meta-package) p linux-image-cloud-amd64-dbg - Debugging symbols for Linux cloud-amd64 configuratio p linux-image-rt-amd64 - Linux for 64-bit PCs (meta-package), PREEMPT_RT p linux-image-rt-amd64-dbg - Debugging symbols for Linux rt-amd64 configuration ( 
andrew@eb8440p:~$ ate show linux-image-4.19.0-6-amd64
Package: linux-image-4.19.0-6-amd64 Version: 4.19.67-2+deb10u2 
New: yes
State: installed
Automatically installed: no
Priority: optional
Section: kernel
Maintainer: Debian Kernel Team <debian-kernel@lists.debian.org>
Architecture: amd64
Uncompressed Size: 269 M
Depends: kmod, linux-base (>= 4.3~), initramfs-tools (>= 0.120+deb8u2) | linux-initramfs-tool
Recommends: firmware-linux-free, apparmor
Suggests: linux-doc-4.19, debian-kernel-handbook, grub-pc | grub-efi-amd64 | extlinux
Conflicts: linux-image-4.19.0-6-amd64-unsigned
Breaks: initramfs-tools (< 0.120+deb8u2), xserver-xorg-input-vmmouse (< 1:13.0.99)
Replaces: linux-image-4.19.0-6-amd64-unsigned
Description: Linux 4.19 for 64-bit PCs (signed)
The Linux kernel 4.19 and modules for use on PCs with AMD64, Intel 64 or VIA Nano processors. The kernel image and modules are signed for use with Secure Boot. 
Homepage: https://www.kernel.org/


andrew@eb8440p:~$ uname -a
Linux eb8440p 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux
andrew@eb8440p:~$
Resume from sleep/hibernation did not work for me with 5.4 kernels, it used to work with 5.3, which is no longer available, additionally, now the problem seemingly even was backported to linux-image-4.19.0-8-amd64:
On my notebook HP elitebook 8440p with intel-graphics I get a black screen when trying to resume and open the lid of the notebook and press the power button, so there is nothing I can do then, but turn power off the hard way (press for 4 secs.) and reboot. I have no idea whether you did this deliberately, but probably you should not port back problems from testing-kernel to the stable branch.
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