[Bug 218901] LG Gram Laptop Extra Features not working on 2024 models (16Z90S)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218901

--- Comment #104 from Evgeny Ch (chgenn.x@gmail.com) ---
I've checked new driver version on LG gram 16 2022. I've tried all Fn+F
combinations. They mostly work. "Reader mode" combo Fn+F9 doesn't have any
effect for me, Ubuntu 26.04 Gnome shell. "Fn+F7" External display toggle
doesn't make any difference to me too.
Also, I've checked `fan_mode` default value & changing it:
$ sudo cat /sys/devices/platform/lg-laptop/fan_mode
0
$ echo 1 | sudo tee /sys/devices/platform/lg-laptop/fan_mode # should disable
LG fan silent mode? Is it correct, by the way?
1
$ sudo cat /sys/devices/platform/lg-laptop/fan_mode
1


Loading driver + keys testing dmesg logs:
```
[ 7437.824922] ACPI Error: No handler for Region [XIN1] (000000006c907335)
[UserDefinedRegion] (20251212/evregion-131)
[ 7437.824931] ACPI Error: Region UserDefinedRegion (ID=143) has no handler
(20251212/exfldio-261)

[ 7437.824935] 
               Initialized Local Variables for Method [_TMP]:
[ 7437.824936]   Local0: 0000000056306aad <Obj>           Integer
0000000000000024

[ 7437.824940] No Arguments are initialized for method [_TMP]

[ 7437.824942] ACPI Error: Aborting method \_SB.PC00.LPCB.LGEC.SEN2._TMP due to
previous error (AE_NOT_EXIST) (20251212/psparse-529)
[ 7441.231104] lg_laptop: loading out-of-tree module taints kernel.
[ 7441.231110] lg_laptop: module verification failed: signature and/or required
key missing - tainting kernel
[ 7441.232304] lg_laptop: product: 16Z90Q-R.APB9U1  year: 2022
[ 7441.247021] input: LG WMI hotkeys as
/devices/platform/LGEX0820:00/input/input19
[ 7441.247202] ACPI: battery: new hook: LG Battery Extension
[ 7552.050047] audit: type=1400 audit(1781536857.026:390): apparmor="AUDIT"
operation="userns_create" class="namespace" info="Userns create - transitioning
profile" profile="unconfined" pid=11371 comm="(ubuntu-insigh)"
requested="userns_create" target="unprivileged_userns"
execpath="/usr/lib/systemd/systemd-executor"
[ 7552.050484] audit: type=1400 audit(1781536857.026:391): apparmor="DENIED"
operation="capable" class="cap" profile="unprivileged_userns" pid=11371
comm="(ubuntu-insigh)" capability=21  capname="sys_admin"
[ 7552.077511] audit: type=1400 audit(1781536857.053:392): apparmor="DENIED"
operation="getattr" class="file" info="Failed name lookup - disconnected path"
error=-13 profile="unprivileged_userns" name="" pid=11379
comm="systemd-detect-" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[ 7615.499008] LG Gram Laptop Support LGEX0820:00: Received event 130
(252116994)
[ 7625.038464] LG Gram Laptop Support LGEX0820:00: Received event 130
(271581201)
[ 7625.160481] usb 3-2: USB disconnect, device number 2
[ 7625.996620] LG Gram Laptop Support LGEX0820:00: Received event 130
(271581218)
[ 7626.256223] usb 3-2: new high-speed USB device number 4 using xhci_hcd
[ 7626.410086] usb 3-2: New USB device found, idVendor=04f2, idProduct=b772,
bcdDevice=52.02
[ 7626.410115] usb 3-2: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 7626.410116] usb 3-2: Product: LGE FHD Camera
[ 7626.410117] usb 3-2: Manufacturer: SunplusIT Inc
[ 7626.410119] usb 3-2: SerialNumber: 01.00.00
[ 7626.422862] uvcvideo 3-2:1.0: Found UVC 1.50 device LGE FHD Camera
(04f2:b772)
[ 7626.469259] uvcvideo 3-2:1.2: Found UVC 1.50 device LGE FHD Camera
(04f2:b772)
[ 7628.254894] LG Gram Laptop Support LGEX0820:00: Received event 128 (116)
[ 7629.540205] LG Gram Laptop Support LGEX0820:00: Received event 128 (116)
[ 7634.692770] wlp0s20f3: deauthenticating from 9c:56:36:1b:71:08 by local
choice (Reason: 3=DEAUTH_LEAVING)
[ 7639.416293] iwlwifi 0000:00:14.3: WFPM_UMAC_PD_NOTIFICATION: 0x20
[ 7639.416354] iwlwifi 0000:00:14.3: WFPM_LMAC2_PD_NOTIFICATION: 0x1f
[ 7639.416362] iwlwifi 0000:00:14.3: WFPM_AUTH_KEY_0: 0x90
[ 7639.416371] iwlwifi 0000:00:14.3: CNVI_SCU_SEQ_DATA_DW9: 0x0
[ 7639.417925] iwlwifi 0000:00:14.3: RFIm is deactivated, reason = 5
[ 7642.781646] wlp0s20f3: authenticate with 9c:56:36:1b:71:08 (local
address=7c:b5:66:d8:c2:af)
[ 7642.782479] wlp0s20f3: send auth to 9c:56:36:1b:71:08 (try 1/3)
[ 7642.827880] wlp0s20f3: authenticated
[ 7642.829123] wlp0s20f3: associate with 9c:56:36:1b:71:08 (try 1/3)
[ 7642.832173] wlp0s20f3: RX AssocResp from 9c:56:36:1b:71:08 (capab=0x1531
status=0 aid=7)
[ 7642.843398] wlp0s20f3: associated
[ 7650.896203] LG Gram Laptop Support LGEX0820:00: Received event 130
(268435456)
[ 7651.875882] LG Gram Laptop Support LGEX0820:00: Received event 130
(268435456)
[ 7652.724018] LG Gram Laptop Support LGEX0820:00: Received event 130
(268435456)
[ 7655.360898] LG Gram Laptop Support LGEX0820:00: Received event 130
(251789312)
[ 7658.047661] LG Gram Laptop Support LGEX0820:00: Received event 130
(251789312)
[ 7660.768967] LG Gram Laptop Support LGEX0820:00: Received event 130
(251789312)
[ 7663.182967] LG Gram Laptop Support LGEX0820:00: Received event 130
(251789312)
[ 7696.705618] audit: type=1400 audit(1781537001.681:393): apparmor="AUDIT"
operation="userns_create" class="namespace" info="Userns create - transitioning
profile" profile="unconfined" pid=12474 comm="(ubuntu-insigh)"
requested="userns_create" target="unprivileged_userns"
execpath="/usr/lib/systemd/systemd-executor"
[ 7696.706172] audit: type=1400 audit(1781537001.682:394): apparmor="DENIED"
operation="capable" class="cap" profile="unprivileged_userns" pid=12474
comm="(ubuntu-insigh)" capability=21  capname="sys_admin"
```

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