Lenovo Yoga 7i

From ArchWiki
Hardware PCI/USB ID Working?
Wifi 8086:a0f0 Yes
Bluetooth 8087:0026 Yes
Speakers 8086:a0c8 Yes
Microphone Yes
Webcam 5986:212a Yes
Keyboard Yes
Touchpad Yes
Touchscreen Yes
Active pen Yes
Fingerprint reader 27c6:55b4 No

Installation

After completing the installation process, the boot partition is not found because NVMe support for Intel's Volume Management Device is not present by default. It is therefore necessary to add vmd to the MODULES section section in /etc/mkinitcpio.conf before regenerating the initramfs, see also [1].

Accessibility

The speakers do not work out of the box (see below), so in particular speech-aided installation is not possible.

Power management

In order to support "Windows Modern Standby", the BIOS does not advertise S3 sleep (suspend to RAM), as discussed in detail in this forum post.

Activating S3 sleep

Follow Lenovo ThinkPad X1 Yoga (Gen 3)#Manual method to patch the DSDT table, but use the following patch instead: 

--- dsdt.dsl
+++ dsdt.dsl
@@ -18,7 +18,7 @@
  *     Compiler ID      "INTL"
  *     Compiler Version 0x20210105 (539033861)
  */
-DefinitionBlock ("", "DSDT", 2, "LENOVO", "CB-01   ", 0x00000002)
+DefinitionBlock ("", "DSDT", 2, "LENOVO", "CB-01   ", 0x00000003)
 {
     External (_GPE.AL6F, MethodObj)    // 0 Arguments
     External (_GPE.P0L6, MethodObj)    // 0 Arguments
@@ -516,7 +516,7 @@

     Name (SS1, Zero)
     Name (SS2, Zero)
-    Name (SS3, Zero)
+    Name (SS3, One)
     Name (SS4, One)
     OperationRegion (GNVS, SystemMemory, 0x45AB8018, 0x0A9B)
     Field (GNVS, AnyAcc, Lock, Preserve)

Battery conservation mode

See Lenovo#Battery Conservation Mode on IdeaPad laptops.

Function keys

Key Visible?1 Marked?2 Effect
Fn+Esc No Yes Enables Fn lock
F1 Yes Yes XF86AudioMute
F2 Yes Yes XF86AudioLowerVolume
F3 Yes Yes XF86AudioRaiseVolume
F4 Yes Yes XF86AudioMicMute
F5 Yes Yes XF86MonBrightnessDown, see below
F6 Yes Yes XF86MonBrightnessUp, see below
F7 Yes Yes Super+p
F8 Yes3 Yes XF86RFKill, toggles soft-block wifi and bluetooth
F9 Yes Yes Super+i
F10 Yes Yes Super+l
F11 Yes Yes Ctrl+Alt+Tab
F12 Yes Yes XF86Calculator
Ins No Yes Opens Lenovo Vantage on Windows, not usable on Linux
Print Yes Yes Mod+Shift+s
Fn+Space No Yes Change keyboard backlight level
  1. The key is visible to xev and similar tools
  2. The physical key has a symbol on it, which describes its function
  3. systemd-logind handles this by default

Brightness keys

The brightness hotkeys only emit signals after resuming from suspend-to-RAM or hibernation, but not after (re)booting. This is because they depend on initialization by an ACPI method which is called when resuming from a sleep state but not on boot.

Speaker audio

Note: This section is outdated with linux 5.14.14, because the patch is now included in the mainline kernel and sound should work out of the box. Only if you cannot update yet, these information may still be relevant to you.

Due to this bug, the speakers do not work without modification, but there is already a patch available. To apply the patch a tool called hda-verb is required. This laptop also requires additional firmware in order for the sound card to work.

Install the alsa-firmware, sof-firmware, alsa-ucm-conf and alsa-tools packages and reboot to activate the firmware.

Save the following script and execute it with root privileges (e.g. sudo activate_audio.bsh) to activate the speakers: 

fix_audio.bsh
#!/usr/bin/bash
while read l ; do hda-verb /dev/snd/hwC0D0 $l ; done <<END
0x20 0x500 0x24
0x20 0x400 0x41
0x20 0x500 0x26
0x20 0x400 0x2
0x20 0x400 0x0
0x20 0x400 0x0
0x20 0x4b0 0x20
0x20 0x500 0x24
0x20 0x400 0x46
0x20 0x500 0x26
0x20 0x400 0xc
0x20 0x400 0x0
0x20 0x400 0x2a
0x20 0x4b0 0x20
0x20 0x500 0x26
0x20 0x400 0x2
0x20 0x400 0x0
0x20 0x400 0x0
0x20 0x4b0 0x20
END

Fingerprint reader

The currently available fingerprint reader drivers for Linux do not support this model and because this is not one of Lenovo's Linux-certified machines, Lenovo will not provide Linux support for this device, either.