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hw:lenovo_legion5 [2022/04/11 09:25] – niziakhw:lenovo_legion5 [2023/10/11 09:14] (current) – niziak
Line 8: Line 8:
 AMD Renoir Chipset AMD Renoir Chipset
  
-===== mt7921e =====+===== 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://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]]   * [[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 ===== ===== sensors =====
  
 k10temp 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>