Thanks. It looks most likely the freeze is a kernel bug in the 'nouveau' driver:
Jun 30 09:41:31 My-System kernel: [TTM] Buffer eviction failed Jun 30 09:44:35 My-System kernel: ------------[ cut here ]------------ Jun 30 09:44:35 My-System kernel: Trying to vfree() bad address (00000000ba0a4082) Jun 30 09:44:35 My-System kernel: WARNING: CPU: 0 PID: 1933 at mm/vmalloc.c:2237 __vunmap+0x1ec/0x210 Jun 30 09:44:35 My-System kernel: Modules linked in: vmw_vsock_vmci_transport vsock vmw_vmci binfmt_misc edac_mce_amd kvm_amd kvm snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio nls_iso8859_1 snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm crct10dif_pclmul ghash_clmulni_intel snd_seq_midi snd_seq_midi_event snd_rawmidi nouveau snd_seq snd_seq_device snd_timer eeepc_wmi aesni_intel asus_wmi mxm_wmi sparse_keymap ttm crypto_simd joydev input_leds cryptd glue_helper video wmi_bmof snd drm_kms_helper fb_sys_fops syscopyarea sysfillrect sysimgblt soundcore k10temp ccp mac_hid sch_fq_codel parport_pc ppdev lp parport drm dm_crypt ip_tables x_tables autofs4 hid_microsoft ff_memless hid_generic usbhid hid crc32_pclmul igb i2c_piix4 i2c_algo_bit ahci dca libahci wmi gpio_amdpt gpio_generic Jun 30 09:44:35 My-System kernel: CPU: 0 PID: 1933 Comm: gnome-shell Not tainted 5.4.0-39-generic #43-Ubuntu Jun 30 09:44:35 My-System kernel: Hardware name: System manufacturer System Product Name/ROG STRIX B350-F GAMING, BIOS 3401 12/04/2017 Jun 30 09:44:35 My-System kernel: RIP: 0010:__vunmap+0x1ec/0x210 Jun 30 09:44:35 My-System kernel: Code: 20 e8 28 cc fc ff eb d2 c3 31 d2 31 f6 48 c7 c7 ff ff ff ff e8 d5 fc ff ff eb bf 48 89 fe 48 c7 c7 d8 f6 37 9d e8 ef 97 e2 ff <0f> 0b eb b4 4c 89 ee 48 c7 c7 00 f7 37 9d e8 dc 97 e2 ff 0f 0b eb Jun 30 09:44:35 My-System kernel: RSP: 0018:ffffc41903d639b8 EFLAGS: 00010286 Jun 30 09:44:35 My-System kernel: RAX: 0000000000000000 RBX: ffffa0d8fb2b0f00 RCX: 0000000000000006 Jun 30 09:44:35 My-System kernel: RDX: 0000000000000007 RSI: 0000000000000082 RDI: ffffa0d93ec178c0 Jun 30 09:44:35 My-System kernel: RBP: ffffc41903d639e0 R08: 000000000000047a R09: 0000000000000004 Jun 30 09:44:35 My-System kernel: R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000f60 Jun 30 09:44:35 My-System kernel: R13: ffffa0d9055d4f60 R14: 00000126c1557d86 R15: ffffc41903d63b08 Jun 30 09:44:35 My-System kernel: FS: 00007f89abd83cc0(0000) GS:ffffa0d93ec00000(0000) knlGS:0000000000000000 Jun 30 09:44:35 My-System kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jun 30 09:44:35 My-System kernel: CR2: 000055a5ddc1aff8 CR3: 00000007a9666000 CR4: 00000000003406f0 Jun 30 09:44:35 My-System kernel: Call Trace: Jun 30 09:44:35 My-System kernel: vunmap+0x30/0x40 Jun 30 09:44:35 My-System kernel: nvkm_umem_unmap+0x4e/0x70 [nouveau] Jun 30 09:44:35 My-System kernel: nvkm_object_dtor+0xa1/0x110 [nouveau] Jun 30 09:44:35 My-System kernel: nvkm_object_del+0x25/0x90 [nouveau] Jun 30 09:44:35 My-System kernel: nvkm_ioctl_del+0x3c/0x60 [nouveau] Jun 30 09:44:35 My-System kernel: nvkm_ioctl+0xf0/0x190 [nouveau] Jun 30 09:44:35 My-System kernel: nvkm_client_ioctl+0x12/0x20 [nouveau] Jun 30 09:44:35 My-System kernel: nvif_object_ioctl+0x4e/0x60 [nouveau] Jun 30 09:44:35 My-System kernel: nvif_object_fini+0x5a/0x80 [nouveau] Jun 30 09:44:35 My-System kernel: nvif_mem_fini+0xe/0x10 [nouveau] Jun 30 09:44:35 My-System kernel: nouveau_mem_fini+0x57/0x70 [nouveau] -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1885330 Title: [nouveau] System unresponsive to keyboard and mouse clicks when changing screen background To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1885330/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
