I was about to give up trying to recreate this. Everything was updated as a hour or so earlier today. Meaning in the last 5 days, whatever updates were prompted had been applied as and when they showed up and I got around to doing the updates. System had not been restarted since the time below. It had been up for over 5 days now since the last time it froze.
00:28:01 up 5 days, 5:53, 1 user, load average: 2.58, 0.96, 0.62 $ uname -a Linux roke 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:23:35 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Bionic Beaver (development branch) Release: 18.04 Codename: bionic But then this happened. This is the first time I have seen any logs that could be useful ... Mar 10 00:32:01 roke kernel: [453428.641614] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:43:crtc-0] flip_done timed out Mar 10 00:33:51 roke kernel: [453478.603354] INFO: rcu_sched detected stalls on CPUs/tasks: Mar 10 00:33:51 roke kernel: [453478.603364] 8-...!: (1 GPs behind) idle=b6c/0/0 softirq=4280452/4280453 fqs=0 Mar 10 00:33:51 roke kernel: [453478.603368] 9-...!: (11 GPs behind) idle=3bc/0/0 softirq=962607/962607 fqs=0 Mar 10 00:33:51 roke kernel: [453478.603371] 10-...!: (0 ticks this GP) idle=a2c/0/0 softirq=3620248/3620248 fqs=0 Mar 10 00:33:51 roke kernel: [453478.603375] 11-...!: (40 GPs behind) idle=cd8/0/0 softirq=3434620/3434620 fqs=0 Mar 10 00:33:51 roke kernel: [453478.603378] 12-...!: (1 GPs behind) idle=ac8/0/0 softirq=5369219/5369220 fqs=0 Mar 10 00:33:51 roke kernel: [453478.603381] 13-...!: (39 GPs behind) idle=528/0/0 softirq=10045630/10045630 fqs=0 Mar 10 00:33:51 roke kernel: [453478.603383] (detected by 4, t=15002 jiffies, g=8374930, c=8374929, q=535) Mar 10 00:33:51 roke kernel: [453478.603388] Sending NMI from CPU 4 to CPUs 8: Mar 10 00:33:51 roke kernel: [453488.529115] Sending NMI from CPU 4 to CPUs 9: Mar 10 00:33:51 roke kernel: [453498.453348] Sending NMI from CPU 4 to CPUs 10: Mar 10 00:33:51 roke kernel: [453508.377571] Sending NMI from CPU 4 to CPUs 11: Mar 10 00:33:51 roke kernel: [453518.301796] Sending NMI from CPU 4 to CPUs 12: Mar 10 00:33:51 roke kernel: [453528.226048] Sending NMI from CPU 4 to CPUs 13: Mar 10 00:33:51 roke kernel: [453538.150337] rcu_sched kthread starved for 26177 jiffies! g8374930 c8374929 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=10 Mar 10 00:33:51 roke kernel: [453538.150340] rcu_sched I 0 8 2 0x80000000 Mar 10 00:33:51 roke kernel: [453538.150344] Call Trace: Mar 10 00:33:51 roke kernel: [453538.150351] __schedule+0x297/0x8a0 Mar 10 00:33:51 roke kernel: [453538.150354] schedule+0x2c/0x80 Mar 10 00:33:51 roke kernel: [453538.150356] schedule_timeout+0x15d/0x350 Mar 10 00:33:51 roke kernel: [453538.150360] ? __next_timer_interrupt+0xe0/0xe0 Mar 10 00:33:51 roke kernel: [453538.150364] rcu_gp_kthread+0x53a/0x960 Mar 10 00:33:51 roke kernel: [453538.150367] kthread+0x121/0x140 Mar 10 00:33:51 roke kernel: [453538.150370] ? rcu_note_context_switch+0x150/0x150 Mar 10 00:33:51 roke kernel: [453538.150371] ? kthread_create_worker_on_cpu+0x70/0x70 Mar 10 00:33:51 roke kernel: [453538.150373] ret_from_fork+0x22/0x40 Mar 10 00:34:06 roke kernel: [453553.171401] sysrq: SysRq : Emergency Remount R/O -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1753346 Title: AMD 7 1800X system (Dell Inspiron 5675) randomly freezes Status in linux package in Ubuntu: Incomplete Bug description: This is happening every day or so. I cannot see anything in the kern.log or syslog that give me a clue on where/what the issue might. I was using Ubuntu 17.10 earlier and upgraded to Ubuntu 18.04 on 3/3/2018, since I thought kernel 4.15 might have better support for the ryzen 7 and also maybe amdgpu for the radeon 580 might be newer. I have removed most external devices except for networking and HDMI and audio out. Attached a tarball of info, although I believe that since I used 'ubuntu-bug linux' command, the information might be duplicated, apologize for any extra attachments. $ ls -l dell-5675-sysinfo/ total 168 -rw-r--r-- 1 pss pss 83139 Mar 4 19:47 dmesg -rw-r--r-- 1 pss pss 26154 Mar 4 19:44 dmidecode -rw-r--r-- 1 pss pss 1507 Mar 4 19:45 gpu-manager.log -rw-r--r-- 1 pss pss 110 Mar 4 19:44 lsb-release-a -rw-r--r-- 1 pss pss 1464 Mar 4 19:44 lscpu -rw-r--r-- 1 pss pss 4353 Mar 4 19:46 lspci -rw-r--r-- 1 pss pss 4105 Mar 4 20:05 lspci-vvv-radeon-580.txt -rw-r--r-- 1 pss pss 19318 Mar 4 19:48 mprime-p95v294b8.linux64-results-2018-03-04.txt -rw-r--r-- 1 pss pss 104 Mar 4 19:44 uname-a -rw-r--r-- 1 pss pss 35 Mar 4 20:27 version.log ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-10-generic 4.15.0-10.11 ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3 Uname: Linux 4.15.0-10-generic x86_64 ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: pss 1801 F.... pulseaudio /dev/snd/controlC0: pss 1801 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sun Mar 4 20:21:55 2018 InstallationDate: Installed on 2018-02-16 (16 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1) MachineType: Dell Inc. Inspiron 5675 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.utf8 SHELL=/bin/bash ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-10-generic.efi.signed root=UUID=d6a2ae1e-5421-435f-8e4c-e377133cebc9 ro quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-10-generic N/A linux-backports-modules-4.15.0-10-generic N/A linux-firmware 1.172 SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2018-03-04 (1 days ago) dmi.bios.date: 12/04/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.3.6 dmi.board.name: 07PR60 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 1.3.6 dmi.modalias: dmi:bvnDellInc.:bvr1.3.6:bd12/04/2017:svnDellInc.:pnInspiron5675:pvr1.3.6:rvnDellInc.:rn07PR60:rvrA00:cvnDellInc.:ct3:cvr1.3.6: dmi.product.family: Inspiron dmi.product.name: Inspiron 5675 dmi.product.version: 1.3.6 dmi.sys.vendor: Dell Inc. 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