====== LENOVO Legion 5 17ACH6 ======

disable_aspm
82K0 (LENOVO_MT_82K0_BU_idea_FM_Legion 5 17ACH6)

AMD Ryzen 5 5600H

AMD Renoir Chipset

===== enter BIOS =====
  - Fn + F12 - boot menu
  - Fn + F2 - setup
  - F9 (no Fn key) - Novo Menu

===== change to GRUB bootloader =====


''grub-install'' complains that system doesn't support EFI variables, but it installs correctly into EFI partition.
Solution is to use another tool, and add GRUB UEFI entry grub manually. From Windows:

<code shell>bcdedit /set "{bootmgr}" path \EFI\debian\shimx64.efi</code>


===== reboot to BIOS =====

Boot to Windows.
  - ''Settings --> Update & Security -> Recovery -> Advanced Startup -> Restart Now''
  - ''Troubleshoot -> Advanced Options -> UEFI Firmware Settings''


===== nvidia =====

To use 2 external monitors:
  - BIOS
    - select "Discrete graphics"
    - disable Secure Boot (to use nvidia modules)
  - Linux
    - ''sudo apt install nvidia-tesla-470-driver''

===== mt7921e =====
  * [[https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1849780.html|Bug#1008973: linux-image-amd64: Very slow wireless with MEDIATEK 7961]]
  * [[https://bbs.archlinux.org/viewtopic.php?id=273641|[Solved] Kernel 5.16.3 broke wifi mt7921e, can I do sth about it?]]
  * [[https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git/commit/drivers/net/wireless/mediatek /mt76/mt7921?id=01f7da40917923bf9d8fd8d5c9a6ed646004e47c|mt76: mt7921: reset wfsys during hw probe]]

==== WiFI disconnects ====

Sometimes network connectivity is blocked. WiFi is connected but no connection to outside. Reconnects helps. Nothing in kernel log.

<code>
04:00.0 Network controller: MEDIATEK Corp. MT7921 802.11ax PCI Express Wireless Network Adapter
	Subsystem: Lenovo MT7921 802.11ax PCI Express Wireless Network Adapter
	Flags: bus master, fast devsel, latency 0, IRQ 75, IOMMU group 12
	Memory at fcf2000000 (64-bit, prefetchable) [size=1M]
	Memory at fcf2100000 (64-bit, prefetchable) [size=16K]
	Memory at fcf2104000 (64-bit, prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: mt7921e
	Kernel modules: mt7921e
</code>

===== sensors =====

k10temp

===== watchdog =====

<code bash>
# dmesg
[    0.197577] NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
[    3.834143] sp5100-tco sp5100-tco: Using 0xfed80b00 for watchdog MMIO address

# ls -l /dev/watchdog*
crw------- 1 root root  10, 130 wrz  8 10:35 /dev/watchdog
crw------- 1 root root 245,   0 wrz  8 10:35 /dev/watchdog0
crw------- 1 root root 245,   1 wrz  8 10:35 /dev/watchdog1

# ls -l /sys/dev/char/10\:130/
lrwxrwxrwx 1 root root    0 wrz  9 10:37 device -> ../../../sp5100-tco

</code>