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This causes a problem where brightness control no longer works after waking up from suspend. This is the output of "journalctl -f" when the issue is triggered: > ... > Dec 25 01:37:00 x395 kernel: usb 4-1: reset full-speed USB device number 2 using xhci_hcd > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring gfx uses VM inv eng 0 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng 1 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng 4 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng 5 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng 6 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng 7 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng 8 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng 9 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng 10 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring kiq_0.2.1.0 uses VM inv eng 11 on hub 0 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring sdma0 uses VM inv eng 0 on hub 8 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring vcn_dec uses VM inv eng 1 on hub 8 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring vcn_enc0 uses VM inv eng 4 on hub 8 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring vcn_enc1 uses VM inv eng 5 on hub 8 > Dec 25 01:37:00 x395 kernel: amdgpu 0000:05:00.0: amdgpu: ring jpeg_dec uses VM inv eng 6 on hub 8 > Dec 25 01:37:00 x395 kernel: irq 7: nobody cared (try booting with the "irqpoll" option) > Dec 25 01:37:00 x395 kernel: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.7-rc1-gc157915828d8 #7 14cb019df871d9dae96d82113f6abf187f110b68 > Dec 25 01:37:00 x395 kernel: Hardware name: LENOVO 20NLCTO1WW/20NLCTO1WW, BIOS R13ET50W(1.24 ) 06/11/2021 > Dec 25 01:37:00 x395 kernel: Call Trace: > Dec 25 01:37:00 x395 kernel: > Dec 25 01:37:00 x395 kernel: dump_stack_lvl+0x5d/0x80 > Dec 25 01:37:00 x395 kernel: __report_bad_irq+0x35/0xa7 > Dec 25 01:37:00 x395 kernel: note_interrupt.cold+0xa/0x62 > Dec 25 01:37:00 x395 kernel: handle_irq_event+0x6f/0x80 > Dec 25 01:37:00 x395 kernel: handle_fasteoi_irq+0x78/0x200 > Dec 25 01:37:00 x395 kernel: __common_interrupt+0x3e/0x90 > Dec 25 01:37:00 x395 kernel: common_interrupt+0x42/0xa0 > Dec 25 01:37:00 x395 kernel: asm_common_interrupt+0x26/0x40 > Dec 25 01:37:00 x395 kernel: RIP: 0010:tmigr_handle_remote+0x87/0x470 > Dec 25 01:37:00 x395 kernel: Code: 24 04 00 0f 84 ac 00 00 00 48 b9 ff ff ff ff ff ff ff 7f 41 0f b6 54 24 10 48 89 4c 24 38 88 54 24 48 49 8b 44 24 08 8b 40 50 <0f> b6 c4 38 c2 74 0e 3c ff 74 0a 49 8b 44 24 18 48 39 c8 74 76 48 > Dec 25 01:37:00 x395 kernel: RSP: 0018:ffffafe000003ea8 EFLAGS: 00000202 > Dec 25 01:37:00 x395 kernel: RAX: 000000003de00141 RBX: 0000000000000002 RCX: 7fffffffffffffff > Dec 25 01:37:00 x395 kernel: RDX: 0000000000000001 RSI: ffffafe000003ed8 RDI: ffffafe000003f10 > Dec 25 01:37:00 x395 kernel: RBP: 0000000000000101 R08: f1c92dc141c95fb9 R09: 263db225b099c5f2 > Dec 25 01:37:00 x395 kernel: R10: f1c92dc141c95fb9 R11: 263db225b099c5f2 R12: ffff989030a26300 > Dec 25 01:37:00 x395 kernel: R13: 0000000000000001 R14: 0000000000000282 R15: 0000000000000001 > Dec 25 01:37:00 x395 kernel: ? srso_return_thunk+0x5/0x5f > Dec 25 01:37:00 x395 kernel: ? __run_timers+0x1fc/0x280 > Dec 25 01:37:00 x395 kernel: handle_softirqs+0xe4/0x2a0 > Dec 25 01:37:00 x395 kernel: __irq_exit_rcu+0x97/0xb0 > Dec 25 01:37:00 x395 kernel: sysvec_apic_timer_interrupt+0x71/0x90 > Dec 25 01:37:00 x395 kernel: > Dec 25 01:37:00 x395 kernel: > Dec 25 01:37:00 x395 kernel: asm_sysvec_apic_timer_interrupt+0x1a/0x20 > Dec 25 01:37:00 x395 kernel: RIP: 0010:tick_nohz_idle_enter+0x59/0x70 > Dec 25 01:37:00 x395 kernel: Code: 02 00 01 83 45 7c 01 e8 05 c9 fe ff 48 89 85 80 00 00 00 48 83 8b 00 62 02 00 04 83 45 7c 01 e8 3d 93 f8 ff fb 0f 1f 44 00 00 <5b> 5d e9 10 d1 c8 00 0f 0b eb c6 66 66 2e 0f 1f 84 00 00 00 00 00 > Dec 25 01:37:00 x395 kernel: RSP: 0018:ffffffffa1c03e68 EFLAGS: 00000282 > Dec 25 01:37:00 x395 kernel: RAX: 0000000874467ae1 RBX: ffff989030a00000 RCX: 0000000874467ae1 > Dec 25 01:37:00 x395 kernel: RDX: 0000000874467ae1 RSI: 0000000000001d53 RDI: 0000000874467ae1 > Dec 25 01:37:00 x395 kernel: RBP: ffff989030a26200 R08: 0000000000000002 R09: 0000000000000000 > Dec 25 01:37:00 x395 kernel: R10: 0000000000000001 R11: 0000000000000000 R12: ffff98903efc9ff4 > Dec 25 01:37:00 x395 kernel: R13: 0000000000000000 R14: ffffffffa1c10038 R15: 00000000aafaf000 > Dec 25 01:37:00 x395 kernel: ? tick_nohz_idle_enter+0x53/0x70 > Dec 25 01:37:00 x395 kernel: do_idle+0x3f/0x210 > Dec 25 01:37:00 x395 kernel: cpu_startup_entry+0x29/0x30 > Dec 25 01:37:00 x395 kernel: rest_init+0xcc/0xd0 > Dec 25 01:37:00 x395 kernel: start_kernel+0x9be/0x9c0 > Dec 25 01:37:00 x395 kernel: x86_64_start_reservations+0x24/0x30 > Dec 25 01:37:00 x395 kernel: x86_64_start_kernel+0x95/0xa0 > Dec 25 01:37:00 x395 kernel: common_startup_64+0x13e/0x141 > Dec 25 01:37:00 x395 kernel: > Dec 25 01:37:00 x395 kernel: handlers: > Dec 25 01:37:00 x395 kernel: [<00000000d69cbeca>] amd_gpio_irq_handler > Dec 25 01:37:00 x395 kernel: Disabling IRQ #7 > Dec 25 01:37:00 x395 kernel: usb 4-2: reset high-speed USB device number 3 using xhci_hcd > Dec 25 01:37:01 x395 kernel: usb 4-2.1: reset high-speed USB device number 4 using xhci_hcd > Dec 25 01:37:01 x395 kernel: OOM killer enabled. > Dec 25 01:37:01 x395 kernel: Restarting tasks ... > Dec 25 01:37:01 x395 kernel: usb 4-2.2: USB disconnect, device number 5 > Dec 25 01:37:01 x395 kernel: done. > ... The problem only happens in the stable branch (v6.12.y) and not in the main branch. More specifically: Version Problem present ================================================================= v6.12.5 Yes !! v6.12.5 + revert 99a02eab No v6.12.7-rc1 (c157915828d) Yes !! v6.12.7-rc1 (c157915828d) + revert 99a02eab No v6.13-rc4 No