Hi there, I got the exact same error in a different laptop. Using kernel 5.4.19-1 (5.4.0-4)
See attached file for the kernel log.
Apr 29 17:48:47 ranger kernel: [ 3252.715611] BUG: kernel NULL pointer dereference, address: 0000000000000040 Apr 29 17:48:47 ranger kernel: [ 3252.715616] #PF: supervisor read access in kernel mode Apr 29 17:48:47 ranger kernel: [ 3252.715618] #PF: error_code(0x0000) - not-present page Apr 29 17:48:47 ranger kernel: [ 3252.715619] PGD 0 P4D 0 Apr 29 17:48:47 ranger kernel: [ 3252.715623] Oops: 0000 [#1] SMP PTI Apr 29 17:48:47 ranger kernel: [ 3252.715627] CPU: 1 PID: 1129 Comm: xfwm4 Tainted: P OE 5.4.0-4-amd64 #1 Debian 5.4.19-1 Apr 29 17:48:47 ranger kernel: [ 3252.715629] Hardware name: LENOVO 81BF/LNVNB161216, BIOS 6JCN23WW 01/23/2018 Apr 29 17:48:47 ranger kernel: [ 3252.715680] RIP: 0010:i915_active_acquire+0x9/0x70 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715682] Code: 00 00 00 48 c7 46 58 00 00 00 00 c7 46 38 00 00 00 00 48 c7 c6 0a 70 62 c0 e9 33 c0 b9 e6 0f 1f 00 0f 1f 44 00 00 41 54 55 53 <8b> 47 38 48 89 fb 85 c0 74 15 8d 50 01 f0 0f b1 53 38 75 f2 45 31 Apr 29 17:48:47 ranger kernel: [ 3252.715684] RSP: 0018:ffffa33681ea7a40 EFLAGS: 00010286 Apr 29 17:48:47 ranger kernel: [ 3252.715686] RAX: 0000000000000000 RBX: ffff8f0a246cdf00 RCX: 0000000000000000 Apr 29 17:48:47 ranger kernel: [ 3252.715687] RDX: ffff8f0a1ab9df80 RSI: ffff8f0a246cdf00 RDI: 0000000000000008 Apr 29 17:48:47 ranger kernel: [ 3252.715688] RBP: ffff8f0a1ab9df80 R08: ffff8f09bcb9e708 R09: ffff8f09bcb9e708 Apr 29 17:48:47 ranger kernel: [ 3252.715689] R10: 000000000000a000 R11: 0000000000000000 R12: 0000000000000008 Apr 29 17:48:47 ranger kernel: [ 3252.715690] R13: 0000000000000004 R14: ffff8f0a1ab9df80 R15: 000000004000001c Apr 29 17:48:47 ranger kernel: [ 3252.715692] FS: 00007f2eeeedbf00(0000) GS:ffff8f0a33c40000(0000) knlGS:0000000000000000 Apr 29 17:48:47 ranger kernel: [ 3252.715693] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Apr 29 17:48:47 ranger kernel: [ 3252.715695] CR2: 0000000000000040 CR3: 00000004681e2002 CR4: 00000000003606e0 Apr 29 17:48:47 ranger kernel: [ 3252.715696] Call Trace: Apr 29 17:48:47 ranger kernel: [ 3252.715730] i915_active_ref+0x21/0x210 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715734] ? _cond_resched+0x15/0x30 Apr 29 17:48:47 ranger kernel: [ 3252.715766] i915_vma_move_to_active+0x6e/0xf0 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715795] i915_gem_do_execbuffer+0xc62/0x1520 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715800] ? _cond_resched+0x15/0x30 Apr 29 17:48:47 ranger kernel: [ 3252.715802] ? mutex_lock+0xe/0x30 Apr 29 17:48:47 ranger kernel: [ 3252.715805] ? unix_stream_read_generic+0x1f7/0x8f0 Apr 29 17:48:47 ranger kernel: [ 3252.715809] ? __kmalloc_node+0x1f5/0x300 Apr 29 17:48:47 ranger kernel: [ 3252.715835] i915_gem_execbuffer2_ioctl+0x1df/0x3d0 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715865] ? i915_gem_madvise_ioctl+0x13a/0x290 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715891] ? i915_gem_execbuffer_ioctl+0x2e0/0x2e0 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715906] drm_ioctl_kernel+0xaa/0xf0 [drm] Apr 29 17:48:47 ranger kernel: [ 3252.715918] drm_ioctl+0x208/0x390 [drm] Apr 29 17:48:47 ranger kernel: [ 3252.715945] ? i915_gem_execbuffer_ioctl+0x2e0/0x2e0 [i915] Apr 29 17:48:47 ranger kernel: [ 3252.715948] do_vfs_ioctl+0x40e/0x670 Apr 29 17:48:47 ranger kernel: [ 3252.715950] ksys_ioctl+0x5e/0x90 Apr 29 17:48:47 ranger kernel: [ 3252.715952] __x64_sys_ioctl+0x16/0x20 Apr 29 17:48:47 ranger kernel: [ 3252.715956] do_syscall_64+0x52/0x160 Apr 29 17:48:47 ranger kernel: [ 3252.715959] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Apr 29 17:48:47 ranger kernel: [ 3252.715961] RIP: 0033:0x7f2ef03bd427 Apr 29 17:48:47 ranger kernel: [ 3252.715964] Code: 00 00 90 48 8b 05 69 7a 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 39 7a 0c 00 f7 d8 64 89 01 48 Apr 29 17:48:47 ranger kernel: [ 3252.715965] RSP: 002b:00007fffd63b65c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 Apr 29 17:48:47 ranger kernel: [ 3252.715967] RAX: ffffffffffffffda RBX: 00007fffd63b6610 RCX: 00007f2ef03bd427 Apr 29 17:48:47 ranger kernel: [ 3252.715968] RDX: 00007fffd63b6610 RSI: 0000000040406469 RDI: 000000000000000a Apr 29 17:48:47 ranger kernel: [ 3252.715969] RBP: 0000000040406469 R08: 000055d72e5a8000 R09: 0000000000000000 Apr 29 17:48:47 ranger kernel: [ 3252.715970] R10: 0000000000000000 R11: 0000000000000246 R12: 000055d72e8d1ba0 Apr 29 17:48:47 ranger kernel: [ 3252.715971] R13: 000000000000000a R14: ffffffffffffffff R15: 00007f2eed182e08 Apr 29 17:48:47 ranger kernel: [ 3252.715973] Modules linked in: ctr ccm nvidia_modeset(POE) bnep bbswitch(OE) intel_rapl_msr intel_rapl_common snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi snd_hda_codec_hdmi snd_soc_core btusb btrtl btbcm btintel snd_hda_codec_generic ath10k_pci snd_compress bluetooth ledtrig_audio ath10k_core snd_hda_intel x86_pkg_temp_thermal nls_ascii intel_powerclamp ath snd_intel_nhlt nls_cp437 coretemp kvm_intel joydev vfat snd_hda_codec efi_pstore nft_counter fat mac80211 kvm snd_hda_core uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 drbg irqbypass videobuf2_common snd_hwdep intel_cstate ansi_cprng videodev ecdh_generic nft_ct intel_uncore cfg80211 mc ecc snd_pcm intel_rapl_perf nf_conntrack sg serio_raw snd_timer intel_wmi_thunderbolt tpm_crb iTCO_wdt nf_defrag_ipv6 iTCO_vendor_support snd wmi_bmof efivars libarc4 tpm_tis soundcore intel_pch_thermal elan_i2c nf_defrag_ipv4 mei_me watchdog libcrc32c tpm_tis_core Apr 29 17:48:47 ranger kernel: [ 3252.716004] ideapad_laptop mei sparse_keymap rfkill tpm evdev ac acpi_pad rng_core nvidia(POE) nf_tables_set nf_tables ipmi_devintf ipmi_msghandler nfnetlink efivarfs ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_crypt dm_mod sd_mod i915 crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i2c_algo_bit drm_kms_helper i2c_designware_platform i2c_designware_core ahci xhci_pci libahci xhci_hcd aesni_intel drm libata crypto_simd usbcore r8169 scsi_mod cryptd glue_helper realtek i2c_hid libphy hid intel_lpss_pci i2c_i801 intel_lpss idma64 mfd_core usb_common button battery video wmi [last unloaded: nvidia_modeset] Apr 29 17:48:47 ranger kernel: [ 3252.716028] CR2: 0000000000000040 Apr 29 17:48:47 ranger kernel: [ 3252.716030] ---[ end trace 0c1d0da72d0f3058 ]---
