Originally reported here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914495 elektron@x200:~$ ls -la /vmlinuz* lrwxrwxrwx 1 root root 27 Dec 4 23:23 /vmlinuz -> boot/vmlinuz-4.18.0-3-amd64 lrwxrwxrwx 1 root root 27 Dec 4 23:23 /vmlinuz.old -> boot/vmlinuz-4.18.0-2-amd64 elektron@x200:~$ dpkg -l | grep linux-image | grep 4\.18 ii linux-image-4.18.0-1-amd64 4.18.6-1 amd64 Linux 4.18 for 64-bit PCs ii linux-image-4.18.0-2-amd64 4.18.10-2+b1 amd64 Linux 4.18 for 64-bit PCs ii linux-image-4.18.0-3-amd64 4.18.20-2 amd64 Linux 4.18 for 64-bit PCs ii linux-image-amd64 4.18+100 amd64 Linux for 64-bit PCs (meta-package) elektron@x200:~$ lspci | grep -i vga 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) elektron@x200:~$ sudo journalctl --boot -1 | less <SNIP> Dec 05 08:00:10 x200 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 Dec 05 08:00:10 x200 kernel: PGD 0 P4D 0 Dec 05 08:00:10 x200 kernel: Oops: 0000 [#1] SMP PTI Dec 05 08:00:10 x200 kernel: CPU: 1 PID: 385 Comm: systemd-udevd Tainted: G I 4.18.0-3-amd64 #1 Debian 4.18.20-2 Dec 05 08:00:10 x200 kernel: Hardware name: LENOVO 7459PB1/7459PB1, BIOS CBET4000 3774c98 09/07/2016 Dec 05 08:00:10 x200 kernel: RIP: 0010:gen4_render_ring_flush+0x55/0xf0 [i915] Dec 05 08:00:10 x200 kernel: Code: 00 be 16 00 00 00 48 89 ef e8 87 fe ff ff 48 3d 00 f0 ff ff 77 69 89 18 c7 40 04 02 40 00 7a 48 8b 55 78 48 8b 92 10 02 00 00 <48> 8b 52 08 48 c7 40 0c 00 00 00 00 83 ca 04 89 50 08 48 8d 50 14 Dec 05 08:00:10 x200 kernel: RSP: 0018:ffffa814811b7a88 EFLAGS: 00010287 Dec 05 08:00:10 x200 kernel: RAX: ffffa814903ed000 RBX: 0000000002000022 RCX: 000000000001ff68 Dec 05 08:00:10 x200 kernel: RDX: 0000000000000000 RSI: 00000000000001a8 RDI: 0000000000000150 Dec 05 08:00:10 x200 kernel: RBP: ffff9b9ce3b57d40 R08: 0000000000000001 R09: 0000000000000002 Dec 05 08:00:10 x200 kernel: R10: ffffa814811b7a58 R11: 0000000000000000 R12: ffff9b9ce2340000 Dec 05 08:00:10 x200 kernel: R13: ffff9b9ce44ea600 R14: 0000000000000000 R15: ffff9b9ce3b57d40 Dec 05 08:00:10 x200 kernel: FS: 00007fa115f0a8c0(0000) GS:ffff9b9cefd00000(0000) knlGS:0000000000000000 Dec 05 08:00:10 x200 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Dec 05 08:00:10 x200 kernel: CR2: 0000000000000008 CR3: 0000000220f7c000 CR4: 00000000000406e0 Dec 05 08:00:10 x200 kernel: Call Trace: Dec 05 08:00:10 x200 kernel: i915_request_alloc+0x243/0x360 [i915] Dec 05 08:00:10 x200 kernel: i915_gem_init+0x284/0x480 [i915] Dec 05 08:00:10 x200 kernel: i915_driver_load+0xb22/0xef0 [i915] Dec 05 08:00:10 x200 kernel: ? mutex_lock+0xe/0x30 Dec 05 08:00:10 x200 kernel: ? acpi_dev_found+0x5f/0x70 Dec 05 08:00:10 x200 kernel: local_pci_probe+0x42/0xa0 Dec 05 08:00:10 x200 kernel: ? pci_assign_irq+0x27/0x130 Dec 05 08:00:10 x200 kernel: pci_device_probe+0x146/0x1b0 Dec 05 08:00:10 x200 kernel: driver_probe_device+0x2fa/0x470 Dec 05 08:00:10 x200 kernel: __driver_attach+0xdc/0x100 Dec 05 08:00:10 x200 kernel: ? driver_probe_device+0x470/0x470 Dec 05 08:00:10 x200 kernel: bus_for_each_dev+0x76/0xc0 Dec 05 08:00:10 x200 kernel: ? klist_add_tail+0x3b/0x70 Dec 05 08:00:10 x200 kernel: bus_add_driver+0x161/0x260 Dec 05 08:00:10 x200 kernel: ? 0xffffffffc0b83000 Dec 05 08:00:10 x200 kernel: driver_register+0x5b/0xe0 Dec 05 08:00:10 x200 kernel: ? 0xffffffffc0b83000 Dec 05 08:00:10 x200 kernel: do_one_initcall+0x46/0x1c8 Dec 05 08:00:10 x200 kernel: ? _cond_resched+0x15/0x40 Dec 05 08:00:10 x200 kernel: ? kmem_cache_alloc_trace+0x15d/0x1c0 Dec 05 08:00:10 x200 kernel: ? do_init_module+0x22/0x201 Dec 05 08:00:10 x200 kernel: do_init_module+0x5b/0x201 Dec 05 08:00:10 x200 kernel: load_module.constprop.56+0x1649/0x1d80 Dec 05 08:00:10 x200 kernel: ? vfs_read+0x113/0x130 Dec 05 08:00:10 x200 kernel: ? vfs_read+0x113/0x130 Dec 05 08:00:10 x200 kernel: ? __do_sys_finit_module+0xe9/0x110 Dec 05 08:00:10 x200 kernel: __do_sys_finit_module+0xe9/0x110 Dec 05 08:00:10 x200 kernel: do_syscall_64+0x55/0x110 Dec 05 08:00:10 x200 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 Dec 05 08:00:10 x200 kernel: RIP: 0033:0x7fa11696ea79 Dec 05 08:00:10 x200 kernel: Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 df 43 0c 00 f7 d8 64 89 01 48 Dec 05 08:00:10 x200 kernel: RSP: 002b:00007ffc86db6728 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 Dec 05 08:00:10 x200 kernel: RAX: ffffffffffffffda RBX: 0000559ef1eefd00 RCX: 00007fa11696ea79 Dec 05 08:00:10 x200 kernel: RDX: 0000000000000000 RSI: 00007fa116874cad RDI: 0000000000000011 Dec 05 08:00:10 x200 kernel: RBP: 00007fa116874cad R08: 0000000000000000 R09: 0000000000000000 Dec 05 08:00:10 x200 kernel: R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000 Dec 05 08:00:10 x200 kernel: R13: 0000559ef1ed6430 R14: 0000000000020000 R15: 0000559ef1eefd00 Dec 05 08:00:10 x200 kernel: Modules linked in: arc4 ath9k ath9k_common ath9k_hw coretemp ath kvm_intel snd_hda_codec_conexant snd_hda_codec_generic kvm irqbypass i915(+) mac80211 evdev snd_hda_intel sg drm_kms_helper snd_hda_codec iTCO_wdt serio_raw iTCO_vendor_support thinkpad_acpi snd_hda_core drm cfg80211 snd_hwdep snd_pcm i2c_algo_bit snd_timer nvram snd soundcore rfkill ac battery video pcc_cpufreq acpi_cpufreq button parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_decompress zstd_compress xxhash raid6_pq libcrc32c crc32c_generic ecb crypto_simd cryptd glue_helper aes_x86_64 xts algif_skcipher af_alg dm_crypt dm_mod sd_mod ahci psmouse libahci libata i2c_i801 scsi_mod lpc_ich ehci_pci uhci_hcd ehci_hcd thermal e1000e usbcore usb_common Dec 05 08:00:10 x200 kernel: CR2: 0000000000000008 Dec 05 08:00:10 x200 kernel: ---[ end trace 12fb00c23be607b4 ]--- Dec 05 08:00:10 x200 kernel: RIP: 0010:gen4_render_ring_flush+0x55/0xf0 [i915] Dec 05 08:00:10 x200 kernel: Code: 00 be 16 00 00 00 48 89 ef e8 87 fe ff ff 48 3d 00 f0 ff ff 77 69 89 18 c7 40 04 02 40 00 7a 48 8b 55 78 48 8b 92 10 02 00 00 <48> 8b 52 08 48 c7 40 0c 00 00 00 00 83 ca 04 89 50 08 48 8d 50 14 Dec 05 08:00:10 x200 kernel: RSP: 0018:ffffa814811b7a88 EFLAGS: 00010287 Dec 05 08:00:10 x200 kernel: RAX: ffffa814903ed000 RBX: 0000000002000022 RCX: 000000000001ff68 Dec 05 08:00:10 x200 kernel: RDX: 0000000000000000 RSI: 00000000000001a8 RDI: 0000000000000150 Dec 05 08:00:10 x200 kernel: RBP: ffff9b9ce3b57d40 R08: 0000000000000001 R09: 0000000000000002 Dec 05 08:00:10 x200 kernel: R10: ffffa814811b7a58 R11: 0000000000000000 R12: ffff9b9ce2340000 Dec 05 08:00:10 x200 kernel: R13: ffff9b9ce44ea600 R14: 0000000000000000 R15: ffff9b9ce3b57d40 Dec 05 08:00:10 x200 kernel: FS: 00007fa115f0a8c0(0000) GS:ffff9b9cefd00000(0000) knlGS:0000000000000000 Dec 05 08:00:10 x200 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Dec 05 08:00:10 x200 kernel: CR2: 0000000000000008 CR3: 0000000220f7c000 CR4: 00000000000406e0 <SNIP> I'm running Debian Buster on a Taurinus X200 (Lenovo x200, with libreboot.) Let me know if there's any more info I can provide. I tested some upstream stable kernels and can report that the bug is not present in v4.18.19 and is present in v4.18.20. * a9da8725b7a7 (tag: v4.18.20) Linux 4.18.20 * 6559b2338d96 (tag: v4.18.19) Linux 4.18.19 Specifically This seems to fix v4.18.20 for me: > commit e0790ccfd489d46c0eeed32a8c4443b9b2119766 (HEAD -> test) > Author: Philip J Freeman <elektron@halo.nu> > Date: Fri Dec 7 16:02:46 2018 -0800 > > Revert "drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5" > > This reverts commit 06e562e7f515292ea7721475950f23554214adde. >
*** This bug has been marked as a duplicate of bug 108850 ***
Closing. Reporter, please follow the bug this is a duplicate of (and which is now fixed, hopefully this resolves your issue)
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