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linux/drivers/acpi
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Shivam Kalra 8d79505d1b ACPI: video: force native backlight on HP OMEN 16 (8A44) 
commit 4b506ea535 upstream.

The HP OMEN 16 Gaming Laptop (board name 8A44) has a mux-less hybrid
GPU configuration with AMD Rembrandt (Radeon 680M) and NVIDIA GA104
(RTX 3070 Ti). The internal eDP panel is wired to the AMD iGPU.

When Nouveau loads without GSP firmware, the ACPI video backlight
device (acpi_video0) gets registered alongside the native AMD
backlight (amdgpu_bl2). In this state, writes to amdgpu_bl2 update
the software brightness value but fail to change the physical panel
brightness.

Force native backlight to prevent acpi_video0 from registering.
Confirmed that booting with acpi_backlight=native resolves the
issue.

Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Shivam Kalra <shivamkalra98@zohomail.in>
Link: https://patch.msgid.link/20260426-omen-16-backlight-fix-v1-1-62364f268ea6@zohomail.in
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-06-01 17:35:19 +02:00
..
acpica ACPICA: Allow address_space_handler Install and _REG execution as 2 separate steps 2026-04-18 10:33:26 +02:00
apei APEI/GHES: ensure that won't go past CPER allocated record 2026-03-04 07:19:58 -05:00
arm64 acpi/arm64: Adjust error handling procedure in gtdt_parse_timer_block() 2024-12-14 19:50:43 +01:00
dptf ACPI: DPTF: Add new PCH FIVR methods 2021-08-04 18:08:50 +02:00
nfit ACPI: NFIT: Fix incorrect ndr_desc being reportedin dev_err message 2025-10-19 16:21:34 +02:00
numa acpi,srat: Fix incorrect device handle check for Generic Initiator 2025-12-07 06:09:28 +09:00
pmic ACPI: PMIC: Remove unneeded check in tps68470_pmic_opregion_probe() 2024-10-17 15:10:43 +02:00
x86 ACPI: x86: Force StorageD3Enable on more products 2024-07-05 09:14:39 +02:00
ac.c ACPI: AC: Quirk GK45 to skip reading _PSR 2021-11-18 19:16:19 +01:00
acpi_adxl.c ACPI/ADXL: Add address translation interface using an ACPI DSM 2018-10-16 10:03:00 +02:00
acpi_amba.c ACPI: AMBA: Fix resource name in /proc/iomem 2021-06-30 20:01:10 +02:00
acpi_apd.c serial: 8250_dw: Add device HID for new AMD UART controller 2021-05-13 17:08:42 +02:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Using pr_fmt() and remove PREFIX 2021-06-07 15:36:45 +02:00
acpi_configfs.c ACPI: configfs: Make get_header() to return error pointer 2021-07-16 19:20:28 +02:00
acpi_dbg.c ACPI: debug: fix signedness issues in read/write helpers 2025-10-19 16:21:43 +02:00
acpi_extlog.c ACPI: extlog: fix NULL pointer dereference check 2024-02-23 08:54:38 +01:00
acpi_fpdt.c ACPI: FPDT: properly handle invalid FPDT subtables 2023-11-28 16:56:29 +00:00
acpi_ipmi.c ACPI: ipmi: Remove address space handler in error path 2021-05-24 16:27:34 +02:00
acpi_lpat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_lpit.c ACPI: LPIT: Avoid u32 multiplication overflow 2024-01-25 14:52:33 -08:00
acpi_lpss.c ACPI: LPSS: Fix the fractional clock divider flags 2024-01-25 14:52:34 -08:00
acpi_memhotplug.c ACPI: memhotplug: use a single static memory group for a single memory device 2021-09-08 11:50:23 -07:00
acpi_pad.c ACPI: PAD: fix crash in exit_round_robin() 2024-10-17 15:11:24 +02:00
acpi_platform.c ACPI: platform: Remove ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_pnp.c ACPI: PNP: compare the string length in the matching_id() 2020-12-15 19:30:49 +01:00
acpi_processor.c ACPI: processor: Fix previous acpi_processor_errata_piix4() fix 2026-04-18 10:33:21 +02:00
acpi_tad.c ACPI: TAD: Add missing sysfs_remove_group() for ACPI_TAD_RT 2025-10-19 16:21:43 +02:00
acpi_video.c ACPI: video: Fix use-after-free in acpi_video_switch_brightness() 2025-12-07 06:09:13 +09:00
acpi_watchdog.c ACPI: watchdog: Replace open coded variant of resource_union() 2020-11-17 18:06:29 +01:00
battery.c Revert "ACPI: battery: negate current when discharging" 2025-07-17 18:30:50 +02:00
bgrt.c ACPI: bgrt: Use sysfs_emit 2021-06-23 19:27:50 +02:00
blacklist.c ACPI: blacklist: Unify the message printing 2021-06-07 15:36:45 +02:00
bus.c ACPI: bus: Bail out if acpi_kobj registration fails 2025-06-27 11:05:28 +01:00
button.c ACPI: button: Add DMI quirk for Samsung Galaxy Book2 to fix initial lid detection issue 2024-11-01 01:52:37 +01:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c ACPI: CPPC: Fix related_cpus inconsistency during CPU hotplug 2026-06-01 17:35:19 +02:00
custom_method.c ACPI: custom_method: fix a possible memory leak 2021-04-28 19:17:54 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c for-5.14/drivers-2021-06-29 2021-06-30 12:21:16 -07:00
device_sysfs.c ACPI: sysfs: validate return type of _STR method 2024-10-17 15:11:13 +02:00
dock.c ACPI: dock: fix some coding style issues 2021-04-08 16:27:03 +02:00
ec.c ACPI: EC: Fix ECDT probe ordering issues 2026-04-18 10:33:26 +02:00
ec_sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
event.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
evged.c ACPI: GED: fix -Wformat 2020-11-09 19:25:20 +01:00
fan.c ACPI: fan: cleanup resources in the error path of .probe() 2025-03-13 12:49:56 +01:00
fan.h ACPI: PM / fan: Put fan device IDs into separate header file 2021-05-21 19:02:35 +02:00
glue.c Revert "ACPI: scan: Release PM resources blocked by unused objects" 2021-11-21 13:44:14 +01:00
hed.c ACPI: HED: Always initialize before evged 2025-06-04 14:38:01 +02:00
internal.h ACPI: EC: Fix EC address space handler unregistration 2026-04-18 10:33:26 +02:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c ACPI: irq: Fix incorrect return value in acpi_register_gsi() 2023-10-25 11:59:02 +02:00
Kconfig ACPI: HED: Always initialize before evged 2025-06-04 14:38:01 +02:00
Makefile IOMMU Updates for Linux v5.14 2021-07-02 13:22:47 -07:00
nvs.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
osi.c ACPI: OSI: Add DMI quirk for Acer Aspire One D255 2026-04-18 10:33:11 +02:00
osl.c ACPI: OSL: fix __iomem type on return from acpi_os_map_generic_address() 2026-04-18 10:33:13 +02:00
pci_irq.c ACPI: PCI: IRQ: Consolidate printing diagnostic messages 2021-03-08 16:51:08 +01:00
pci_link.c ACPI: utils: Introduce acpi_evaluation_failure_warn() 2021-03-08 19:10:30 +01:00
pci_mcfg.c PCI/ACPI: Guard ARM64-specific mcfg_quirks 2022-08-25 11:40:36 +02:00
pci_root.c ACPI: APEI: explicit init of HEST and GHES in apci_init() 2022-08-17 14:23:11 +02:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
platform_profile.c ACPI: platform-profile: Fix CFI violation when accessing sysfs files 2025-05-02 07:44:06 +02:00
power.c ACPI: scan: Use acpi_dev_put() in object add error paths 2026-06-01 17:35:19 +02:00
pptt.c ACPI: PPTT: Fix processor subtable walk 2025-05-22 14:08:25 +02:00
prmt.c ACPI: PRM: Skip handlers with NULL handler_address or NULL VA 2025-12-07 06:09:16 +09:00
proc.c ACPI: proc: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_core.c ACPI: processor_core: fix map_x2apic_id for amd-pstate on am4 2026-01-19 13:09:34 +01:00
processor_driver.c ACPI: processor: Get rid of ACPICA message printing 2021-03-08 16:51:19 +01:00
processor_idle.c ACPI: processor: idle: Fix memory leak when register cpuidle device failed 2025-10-19 16:21:29 +02:00
processor_pdc.c ACPI: processor: Fix evaluating _PDC method when running as Xen dom0 2023-05-11 23:00:22 +09:00
processor_perflib.c ACPI: processor: perflib: Move problematic pr->performance check 2025-08-28 16:24:15 +02:00
processor_thermal.c ACPI: processor: Remove freq Qos request for all CPUs 2022-08-31 17:16:48 +02:00
processor_throttling.c Merge branches 'acpi-dptf' and 'acpi-messages' 2021-06-29 15:50:37 +02:00
property.c ACPI: property: Use ACPI functions in acpi_graph_get_next_endpoint() only 2026-01-19 13:09:41 +01:00
reboot.c ACPI: reboot: Unify the message printing 2021-06-07 15:36:46 +02:00
resource.c ACPI: resource: Skip IRQ override on ASUS Vivobook 14 X1404VAP 2025-04-10 14:32:06 +02:00
sbs.c ACPI: SBS: manage alarm sysfs attribute through psy core 2024-08-19 05:45:37 +02:00
sbshc.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: scan: Use acpi_dev_put() in object add error paths 2026-06-01 17:35:19 +02:00
sleep.c ACPI: PM: Save NVS memory on Lenovo G70-35 2026-04-18 10:33:11 +02:00
sleep.h Revert "Revert "ACPI: scan: Turn off unused power resources during initialization"" 2021-05-10 14:02:17 +02:00
spcr.c ACPI: SPCR: Add support for the new 16550-compatible Serial Port Subtype 2021-08-16 18:38:08 +02:00
sysfs.c ACPI: sysfs: Fix BERT error region memory mapping 2022-05-30 09:28:58 +02:00
tables.c memblock: exclude MEMBLOCK_NOMAP regions from kmemleak 2021-10-21 18:30:49 -10:00
thermal.c ACPI: thermal: Drop nocrt parameter 2023-09-02 09:17:07 +02:00
tiny-power-button.c ACPI: tiny-power-button: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
utils.c ACPI: utils: Fix reference counting in for_each_acpi_dev_match() 2021-07-19 16:22:01 +02:00
video_detect.c ACPI: video: force native backlight on HP OMEN 16 (8A44) 2026-06-01 17:35:19 +02:00
viot.c ACPI: VIOT: Initialize the correct IOMMU fwspec 2023-05-11 23:00:23 +09:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00