Contact
darrick.w...@oracle.com
The problem is properly fixed upstream for later 5.4.X and 5.6.X
versions. Copy that.
https://lkml.org/lkml/2020/4/22/938
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What's the output of `cat /sys/power/mem_sleep`?
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https://bugs.launchpad.net/bugs/1864930
Title:
brightness setting and sleep/suspend (echo mem > /sys/power/state) ,
s2ram and
** Package changed: linux-5.4 (Ubuntu) => linux (Ubuntu)
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Title:
brightness setting and sleep/suspend (echo mem > /sys/power/state) ,
s2ram
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-5.4 (Ubuntu)
Status: New => Confirmed
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Title:
The hibernation bug is likely linked to #1866984
(also no solution there...)
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Title:
brightness setting and sleep/suspend (echo mem >
patch exist, please apply for ubuntu 20.04:
marian@kubuntu2004:~/kernelubuntu/linux$ git diff
diff --git a/include/linux/swap.h b/include/linux/swap.h
index de2c67a33b7e..da1dc5a338cc 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -456,6 +456,7 @@ extern void
Problem identified and reported upstream
https://bugzilla.kernel.org/show_bug.cgi?id=206713
** Bug watch added: Linux Kernel Bug Tracker #206713
https://bugzilla.kernel.org/show_bug.cgi?id=206713
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The same goes for 5.4.22-050422-generic:
sudo /usr/lib/systemd/systemd-sleep hibernate
for kernel 5.4.22-050422-generic switches off laptop, but does not resume/thaw
to original state (it boots normally)
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sudo /usr/lib/systemd/systemd-sleep hibernate
for kernel 5.3.0-40-generic switches off laptop, but does not resume/thaw to
original state (it boots normally)
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I also installed
apt install linux-image-5.3.0-1008-oracle.
This kernel works for s2ram, s2disk , brightness , but the special keys
(setting brightness,switch for external monitor, speaker volume, media playback
keys, plane mode key) on my laptop keyboard do not work.
kernels
Ops, mistake:
linux-image-5.3.0-1010-aws and linux-image-5.3.0-1011-gcp work for s2disk, but
s2ram does not work (by design?). linux-image-5.3.0-1008-oracle is working for
both s2disk and s2ram.
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I booted into minimal non-GUI ubuntu20.04 1.4G with 5.4.22-050422 kernel
I removed all possible kernel modules by repeating few times next two commands:
lsmod | grep 0$ | sed 's/^\([^ ]*\).*/rmmod \1/g' > rmmods.sh
source rmmods.sh
root@kubuntu2004:/home/marian# cat
I am looking into
https://wiki.ubuntu.com/DebuggingKernelHibernate
and I will provide more info.
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Title:
brightness setting and sleep/suspend
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