Reinstate ACPI S5 for reboot

[Kai-Heng Feng]

[Impact]
On some systems, Intel WiFi device may stop working after reboot.

[Fix]
Use ACPI S5 for reboot.

[Test]
2000 times of reboot stress, and Intel WiFi continues work on affected
system.

[Where problems could occur]
There was a bug introduced by this patch, but the user didn't want to
find the root cause. Since we have more control on Ubuntu kernel, we'll
fix the root cause properly this time.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-oem-5.14/5.14.0-1025.27 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.14 - 5.14.0-1027.30

---------------
linux-oem-5.14 (5.14.0-1027.30) focal; urgency=medium

  * CVE-2022-0001
    - x86,bugs: Unconditionally allow spectre_v2=retpoline,amd
    - SAUCE: x86/speculation: Rename RETPOLINE_AMD to RETPOLINE_LFENCE
    - SAUCE: x86/speculation: Add eIBRS + Retpoline options
    - SAUCE: Documentation/hw-vuln: Update spectre doc

linux-oem-5.14 (5.14.0-1025.27) focal; urgency=medium

  * focal/linux-oem-5.14: 5.14.0-1025.27 -proposed tracker (LP: #1961265)

  * Packaging resync (LP: #1786013)
    - debian/dkms-versions -- update from kernel-versions (main/2022.02.21)
    - [Config] Update config to match upstream stable release

  * Disable iwlwifi UHB (ultra high band) channels if we don't support wifi 6e
    currently (LP: #1961971)
    - SAUCE: iwlwifi: disable 6-7 GHz channels

  * Fix With 20.04d kernel and WX3200, unit freezes on resume (LP: #1961855)
    - SAUCE: drm/amd: Check if ASPM is enabled from PCIe subsystem

  * CVE-2022-25636
    - netfilter: nf_tables_offload: incorrect flow offload action array size

  * Focal update: upstream stable patchset 2022-02-22 (LP: #1961793)
    - PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
    - selftests: mptcp: fix ipv6 routing setup
    - net: ipa: use a bitmap for endpoint replenish_enabled
    - net: ipa: prevent concurrent replenish
    - drm/vc4: hdmi: Make sure the device is powered with CEC
    - net/mlx5e: IPsec: Fix tunnel mode crypto offload for non TCP/UDP traffic
    - net/mlx5: Bridge, take rtnl lock in init error handler
    - net/mlx5: Bridge, ensure dev_name is null-terminated
    - net/mlx5e: Fix handling of wrong devices during bond netevent
    - net/mlx5: Use del_timer_sync in fw reset flow of halting poll
    - net/mlx5e: Fix module EEPROM query
    - net/mlx5: Fix offloading with ESWITCH_IPV4_TTL_MODIFY_ENABLE
    - net/mlx5e: Don't treat small ceil values as unlimited in HTB offload
    - net/mlx5: Bridge, Fix devlink deadlock on net namespace deletion
    - net/mlx5: E-Switch, Fix uninitialized variable modact
    - ipheth: fix EOVERFLOW in ipheth_rcvbulk_callback
    - i40e: Fix reset bw limit when DCB enabled with 1 TC
    - i40e: Fix reset path while removing the driver
    - net: amd-xgbe: ensure to reset the tx_timer_active flag
    - net: amd-xgbe: Fix skb data length underflow
    - fanotify: Fix stale file descriptor in copy_event_to_user()
    - net: sched: fix use-after-free in tc_new_tfilter()
    - rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
    - cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask()
    - af_packet: fix data-race in packet_setsockopt / packet_setsockopt
    - tcp: add missing tcp_skb_can_collapse() test in tcp_shift_skb_data()
    - Revert "drm/vc4: hdmi: Make sure the device is powered with CEC"
    - Revert "drm/vc4: hdmi: Make sure the device is powered with CEC" again
    - drm/i915: Disable DSB usage for now
    - selinux: fix double free of cond_list on error paths
    - audit: improve audit queue handling when "audit=1" on cmdline
    - ipc/sem: do not sleep with a spin lock held
    - spi: stm32-qs...

[Timo Aaltonen (tjaalton)]

this was apparently fixed by iwlwifi