Comment 18 for bug 2031352

A few of my colleagues are also affected with 6.2.

This is really a bad situation.

As workaround we stepped back to linux-oem-22.04c (6.1) which works without problems.

[1.545289] VGA switcheroo: detected Optimus DSM method \_SB_.PC00.PEG1.PEGP handle
[ 1.545290] nouveau: detected PR support, will not use DSM
[ 1.545320] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[ 1.545649] nouveau 0000:01:00.0: NVIDIA GA107 (b77000a1)
[ 1.567694] ACPI Error: Cannot release Mutex [ECMX], not acquired (20221020/exmutex-357)
[ 1.567699] fbcon: Taking over console
[ 1.567703] No Local Variables are initialized for Method [_Q66]
[ 1.567704] No Arguments are initialized for method [_Q66]
[ 1.567705] ACPI Error: Aborting method \_SB.PC00.LPCB.ECDV._Q66 due to previous error (AE_AML_MUTEX_NOT_ACQUIRED) (20221020/psparse-529)
[ 1.629655] usb 3-3: New USB device found, idVendor=0c45, idProduct=6720, bcdDevice=82.68
[ 1.629660] usb 3-3: New USB device strings: Mfr=2, Product=1, SerialNumber=0
[ 1.629661] usb 3-3: Product: Integrated_Webcam_HD
[ 1.629662] usb 3-3: Manufacturer: CN0V976R8LG001C1A5ANA01
[ 1.655115] nouveau 0000:01:00.0: bios: version 94.07.3b.00.e4
[ 1.655549] nouveau 0000:01:00.0: acr: firmware unavailable
[ 1.655693] nouveau 0000:01:00.0: gr: firmware unavailable
[ 1.655706] nouveau 0000:01:00.0: sec2: firmware unavailable
[ 1.655798] nouveau 0000:01:00.0: fb: 4096 MiB GDDR6
[ 1.659174] nouveau 0000:01:00.0: fb: VPR locked, but no scrubber binary!
[ 1.661968] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1.661970] #PF: supervisor instruction fetch in kernel mode
[ 1.661972] #PF: error_code(0x0010) - not-present page
[ 1.661973] PGD 0 P4D 0
[ 1.661975] Oops: 0010 [#1] PREEMPT SMP NOPTI
[ 1.661977] CPU: 14 PID: 233 Comm: systemd-udevd Not tainted 6.2.0-26-generic #26~22.04.1-Ubuntu
[ 1.661980] Hardware name: Dell Inc. Precision 7560/0186RY, BIOS 1.20.0 02/10/2023
[ 1.661981] RIP: 0010:0x0
[ 1.661984] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
[ 1.661985] RSP: 0018:ffffaaf340e0b628 EFLAGS: 00010246
[ 1.661986] RAX: 0000000000000000 RBX: ffff906ce208dcb0 RCX: 0000000000000000
[ 1.661988] RDX: ffff906ce208dcd8 RSI: ffff906ce208dcc8 RDI: ffff906ce208dc00
[ 1.661989] RBP: ffffaaf340e0b688 R08: ffff906ce208dcb0 R09: 0000000000000000
[ 1.661990] R10: 0000000000000000 R11: 0000000000000000 R12: ffff906ce208dcc8
[ 1.661991] R13: 0000000000000000 R14: ffff906ce208dcb0 R15: ffff906ce208dc08
[ 1.661992] FS: 00007f2e66a658c0(0000) GS:ffff90742ff80000(0000) knlGS:0000000000000000
[ 1.661994] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.661995] CR2: ffffffffffffffd6 CR3: 00000001015d4006 CR4: 0000000000770ee0
[ 1.661997] PKRU: 55555554
[ 1.661999] Call Trace:
[ 1.662000] <TASK>
[ 1.662001] nvkm_acr_oneinit+0x502/0x710 [nouveau]
[ 1.662057] nvkm_subdev_oneinit_+0x4d/0x120 [nouveau]
[ 1.662103] nvkm_subdev_init_+0x3e/0x150 [nouveau]
[ 1.662145] nvkm_subdev_init+0x55/0x80 [nouveau]
[ 1.662186] nvkm_device_init+0x17b/0x300 [nouveau]
[ 1.662259] nvkm_udevice_init+0x50/0x60 [nouveau]
[ 1.662322] nvkm_object_init+0x40/0x210 [nouveau]
[ 1.662363] nvkm_ioctl_new+0x196/0x2c0 [nouveau]
[ 1.662403] ? __pfx_nvkm_client_child_new+0x10/0x10 [nouveau]
[ 1.662442] ? __pfx_nvkm_udevice_new+0x10/0x10 [nouveau]
[ 1.662504] nvkm_ioctl+0x12e/0x290 [nouveau]
[ 1.662543] nvkm_client_ioctl+0xe/0x20 [nouveau]
[ 1.662614] nvif_object_ctor+0x136/0x1a0 [nouveau]
[ 1.662652] nvif_device_ctor+0x24/0x90 [nouveau]
[ 1.662690] nouveau_cli_init+0x161/0x5e0 [nouveau]
[ 1.662757] nouveau_drm_device_init+0x67/0x310 [nouveau]
[ 1.662821] nouveau_drm_probe+0x131/0x280 [nouveau]
[ 1.662882] local_pci_probe+0x48/0xb0
[ 1.662886] pci_call_probe+0x55/0x190
[ 1.662888] pci_device_probe+0x84/0x120
[ 1.662890] really_probe+0x1ea/0x450
[ 1.662893] __driver_probe_device+0x8a/0x1a0
[ 1.662895] driver_probe_device+0x23/0xd0
[ 1.662897] __driver_attach+0x10f/0x220
[ 1.662899] ? __pfx___driver_attach+0x10/0x10
[ 1.662901] bus_for_each_dev+0x80/0xe0
[ 1.662903] driver_attach+0x1e/0x30
[ 1.662905] bus_add_driver+0x152/0x250
[ 1.662907] driver_register+0x83/0x160
[ 1.662909] ? __pfx_init_module+0x10/0x10 [nouveau]
[ 1.662949] __pci_register_driver+0x68/0x80
[ 1.662950] nouveau_drm_init+0x177/0xff0 [nouveau]
[ 1.662988] do_one_initcall+0x46/0x240
[ 1.662991] ? kmalloc_trace+0x2a/0xb0
[ 1.662994] do_init_module+0x52/0x240
[ 1.662997] load_module+0xb96/0xd60
[ 1.662999] ? kernel_read_file+0x25c/0x2b0
[ 1.663002] __do_sys_finit_module+0xcc/0x150
[ 1.663004] ? __do_sys_finit_module+0xcc/0x150
[ 1.663006] __x64_sys_finit_module+0x18/0x30
[ 1.663008] do_syscall_64+0x59/0x90
[ 1.663012] ? ksys_mmap_pgoff+0x123/0x270
[ 1.663014] ? exit_to_user_mode_prepare+0x3b/0xd0
[ 1.663018] ? syscall_exit_to_user_mode+0x2a/0x50
[ 1.663020] ? do_syscall_64+0x69/0x90
[ 1.663022] ? do_syscall_64+0x69/0x90
[ 1.663023] ? sysvec_call_function+0x4e/0xb0
[ 1.663025] entry_SYSCALL_64_after_hwframe+0x72/0xdc
[ 1.663029] RIP: 0033:0x7f2e6715ba3d
[ 1.663030] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 a3 0f 00 f7 d8 64 89 01 48
[ 1.663033] RSP: 002b:00007ffe3bf87838 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 1.663035] RAX: ffffffffffffffda RBX: 000056358da85d80 RCX: 00007f2e6715ba3d
[ 1.663036] RDX: 0000000000000000 RSI: 00007f2e672f4441 RDI: 0000000000000017
[ 1.663037] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000002
[ 1.663038] R10: 0000000000000017 R11: 0000000000000246 R12: 00007f2e672f4441
[ 1.663039] R13: 000056358da8f540 R14: 000056358da74b00 R15: 000056358da788e0
[ 1.663041] </TASK>
[ 1.663042] Modules linked in: i915(+) nouveau(+) drm_buddy mxm_wmi i2c_algo_bit drm_ttm_helper ttm drm_display_helper cec rc_core crct10dif_pclmul crc32_pclmul drm_kms_helper polyval_clmulni hid_generic polyval_generic ghash_clmulni_intel sha512_ssse3 rtsx_pci_sdmmc aesni_intel syscopyarea sysfillrect sysimgblt nvme crypto_simd cryptd psmouse drm e1000e thunderbolt nvme_core spi_intel_pci i2c_i801 intel_ish_ipc(+) intel_lpss_pci rtsx_pci spi_intel i2c_smbus intel_lpss xhci_pci intel_ishtp idma64 xhci_pci_renesas nvme_common i2c_hid_acpi video i2c_hid hid wmi pinctrl_tigerlake
[ 1.663064] CR2: 0000000000000000
[ 1.663065] ---[ end trace 0000000000000000 ]---
[ 1.663066] RIP: 0010:0x0
[ 1.663068] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
[ 1.663069] RSP: 0018:ffffaaf340e0b628 EFLAGS: 00010246
[ 1.663070] RAX: 0000000000000000 RBX: ffff906ce208dcb0 RCX: 0000000000000000
[ 1.663072] RDX: ffff906ce208dcd8 RSI: ffff906ce208dcc8 RDI: ffff906ce208dc00
[ 1.663073] RBP: ffffaaf340e0b688 R08: ffff906ce208dcb0 R09: 0000000000000000
[ 1.663074] R10: 0000000000000000 R11: 0000000000000000 R12: ffff906ce208dcc8
[ 1.663075] R13: 0000000000000000 R14: ffff906ce208dcb0 R15: ffff906ce208dc08
[ 1.663076] FS: 00007f2e66a658c0(0000) GS:ffff90742ff80000(0000) knlGS:0000000000000000
[ 1.663078] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.663079] CR2: ffffffffffffffd6 CR3: 00000001015d4006 CR4: 0000000000770ee0
[ 1.663080] PKRU: 55555554