Arch Linux

Mand'alor

Member

Registered: 2020-01-10

Posts: 3

T495 Suspend and Hibernate Not Working - Black Screen

So since installing Arch, I have completely been unable to get either suspend to RAM or Hibernate to work. Suspending seems to work fine, but upon trying to wake the laptop up either by pressing the power button, or opening the lid, the computer wakes up and the keyboard turns on. The screen's backlight turns on, but nothing is displayed. Trying to switch ttyl does nothing either.

$ cat /etc/mkinitcpio.conf

# MODULES
# The following modules are loaded before any boot hooks are
# run.  Advanced users may wish to specify all system modules
# in this array.  For instance:
#     MODULES=(piix ide_disk reiserfs)
MODULES=()

# BINARIES
# This setting includes any additional binaries a given user may
# wish into the CPIO image.  This is run last, so it may be used to
# override the actual binaries included by a given hook
# BINARIES are dependency parsed, so you may safely ignore libraries
BINARIES=()

# FILES
# This setting is similar to BINARIES above, however, files are added
# as-is and are not parsed in any way.  This is useful for config files.
FILES=()

# HOOKS
# This is the most important setting in this file.  The HOOKS control the
# modules and scripts added to the image, and what happens at boot time.
# Order is important, and it is recommended that you do not change the
# order in which HOOKS are added.  Run 'mkinitcpio -H <hook name>' for
# help on a given hook.
# 'base' is _required_ unless you know precisely what you are doing.
# 'udev' is _required_ in order to automatically load modules
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
# Examples:
##   This setup specifies all modules in the MODULES setting above.
##   No raid, lvm2, or encrypted root is needed.
#    HOOKS=(base)
#
##   This setup will autodetect all modules for your system and should
##   work as a sane default
#    HOOKS=(base udev autodetect block filesystems)
#
##   This setup will generate a 'full' image which supports most systems.
##   No autodetection is done.
#    HOOKS=(base udev block filesystems)
#
##   This setup assembles a pata mdadm array with an encrypted root FS.
##   Note: See 'mkinitcpio -H mdadm' for more information on raid devices.
#    HOOKS=(base udev block mdadm encrypt filesystems)
#
##   This setup loads an lvm2 volume group on a usb device.
#    HOOKS=(base udev block lvm2 filesystems)
#
##   NOTE: If you have /usr on a separate partition, you MUST include the
#    usr, fsck and shutdown hooks.
HOOKS=(base udev autodetect modconf block resume filesystems keyboard fsck)

# COMPRESSION
# Use this to compress the initramfs image. By default, gzip compression
# is used. Use 'cat' to create an uncompressed image.
#COMPRESSION="gzip"
#COMPRESSION="bzip2"
#COMPRESSION="lzma"
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"

# COMPRESSION_OPTIONS
# Additional options for the compressor
#COMPRESSION_OPTIONS=()

The kernel I'm running is 5.4.10-arch1-1

Last edited by Mand'alor (2020-01-10 01:18:41)

romstor

Member

Registered: 2018-08-18

Posts: 54

Re: T495 Suspend and Hibernate Not Working - Black Screen

Did you check your machine's wiki page:
Lenovo ThinkPad T495

Check other Lenovo pages as well - they may have workarounds that will work for you as hardware is similar.

Also check out this thread - recent kernel udpate botched suspend for a few (older) architectures - there are a few kernel parameters you can try:
Kernel upgrade has broken suspend

More from Arch Wiki:
Power management/Suspend and hibernate

Bottom of the Laptop page has a few tips.

If nothing helped - check this:
Best practice to debug Linux* suspend/hibernate issues

This is The Way.

Last edited by romstor (2020-01-10 02:35:35)