which magic sysreq keys to gather info on a total system freeze [Solved]

[Charlie Brown]

... why it occurred?..

In fact I was going to write the same thing: The main goal should be to prevent that. If that happens randomly the best is to take the rams out then re-seat. That solved random / unknown freezing issues many times.

[Danathar]

Your very welcome and hope that resolves it :-)

I had one more freeze yesterday, but I had forgotten to restart firefox after disabling hardware accleration, which I've read you need to do. We'll see today if we crash again now that I've restarted FF.

Wow, if it is the Intel driver again it really takes it down HARD. None of the sysreq keys worked yesterday when it froze again :(

Hmm..I wonder if I can get around this by running Firefox with hardware accleration on the nvidia chipset? I've got one of those dell laptops that have both, I could set the prime variables and launch firefox with the nvidia p1000 onboard instead of the intel chip. Could be interesting if that fixed it.

[Danathar]

... why it occurred?..

In fact I was going to write the same thing: The main goal should be to prevent that. If that happens randomly the best is to take the rams out then re-seat. That solved random / unknown freezing issues many times.

I really do think it's the intel video driver with firefox hardware acceleration turned on, but I'll probably do a full memtest to test the ram out just in case. It's new crucial sticks, so I'd be miffed if it was bad memory. Re-seating had not occurred to me though, I'll definitely do that if the freeze happens again.

[Charlie Brown]

Ok, but ( I just felt lazy to add that when typing) re-seating worked all times when mem-test showed everything was fine. Therefore I began skipping suggesting mem-test :)

[Danathar]

Your very welcome and hope that resolves it :-)

Well, sadly I'm still getting crashes about one every other day. Just this morning I went to alt-tilde in KDE and the whole system froze. The only thing in the syslog (nothing in kern or X11) are a bunch of reverse white background colored ^@ symbols. I turned on kdump but the file system looks like it's getting the rug pulled out from underneath it and never has any time to log anything.

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2023-11-21T09:07:44.258875-05:00 dell-mx polkit-kde-authentication-agent-1[2761]: Another client is already authenticating, please try again later.
2023-11-21T09:07:44.259205-05:00 dell-mx plasmashell[23372]: Error executing command as another user: Not authorized
2023-11-21T09:07:44.259223-05:00 dell-mx plasmashell[23372]: This incident has been reported.
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@2023-11-21T09:09:45.496622-05:00 dell-mx kernel: [    0.000000] Linux version 6.1.0-10-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.38-2 (2023-07-27)
2023-11-21T09:09:45.496665-05:00 dell-mx kernel: [    0.000000] Command line: BOOT_IMAGE=/vmlinuz-6.1.0-10-amd64 root=UUID=8bfb9e66-c226-4b5d-bf82-fe277e36040b ro quiet splash crashkernel=1G resume=UUID=8bfb9e66-c226-4b5d-bf82-fe277e36040b resume_offset=59836416 crashkernel=384M-:128M init=/lib/systemd/systemd

Do you have any other suggestions? Memtext86 ran for 6 hours and did multiple passes without issues, so I think my memory is ok.

Maybe I should drop back to the 4 series nvidia driver. Are there some docs on how to do that?

thanks

[CharlesV]

Please post your QSI and lets see what this system consists of.

[Danathar]

Please post your QSI and lets see what this system consists of.

Apologies, I forgot about that. Note that I've uninstalled the nvidia 525 drivers with:

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sudo ddm-mx -p nvidia

to see if the freezing stops, but I'm not hopeful as the P1000 GPU only kicks in when I tell it to with prime, otherwise the intel graphics are used. Also I have kdump turned on just in case I could catch a crash, but alas...

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[CODE]System:
  Kernel: 6.1.0-10-amd64 [6.1.38-2] arch: x86_64 bits: 64 compiler: gcc v: 12.2.0
    parameters: BOOT_IMAGE=/vmlinuz-6.1.0-10-amd64 root=UUID=<filter> ro quiet splash crashkernel=1G
    resume=UUID=<filter> resume_offset=59836416 crashkernel=384M-:128M init=/lib/systemd/systemd
  Desktop: KDE Plasma v: 5.27.5 wm: kwin_x11 vt: 7 dm: SDDM Distro: MX-23.1_KDE_x64 Libretto
    July 31 2023 base: Debian GNU/Linux 12 (bookworm)
Machine:
  Type: Laptop System: Dell product: Precision 5530 v: N/A serial: <superuser required> Chassis:
    type: 10 serial: <superuser required>
  Mobo: Dell model: 0NFGCT v: A00 serial: <superuser required> UEFI: Dell v: 1.32.0
    date: 07/05/2023
Battery:
  ID-1: BAT0 charge: 73.2 Wh (100.0%) condition: 73.2/97.0 Wh (75.4%) volts: 12.5 min: 11.4
    model: LGC-LGC8.33 DELL 5XJ288A type: Li-ion serial: <filter> status: full
CPU:
  Info: model: Intel Core i7-8850H bits: 64 type: MT MCP arch: Coffee Lake gen: core 8 level: v3
    note: check built: 2018 process: Intel 14nm family: 6 model-id: 0x9E (158) stepping: 0xA (10)
    microcode: 0xF4
  Topology: cpus: 1x cores: 6 tpc: 2 threads: 12 smt: enabled cache: L1: 384 KiB
    desc: d-6x32 KiB; i-6x32 KiB L2: 1.5 MiB desc: 6x256 KiB L3: 9 MiB desc: 1x9 MiB
  Speed (MHz): avg: 1466 high: 2600 min/max: 800/4300 scaling: driver: intel_pstate
    governor: powersave cores: 1: 900 2: 900 3: 2600 4: 900 5: 900 6: 900 7: 900 8: 900 9: 2600
    10: 2600 11: 900 12: 2600 bogomips: 62399
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  Vulnerabilities:
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data mitigation: Clear CPU buffers; SMT vulnerable
  Type: retbleed mitigation: IBRS
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: IBRS, IBPB: conditional, STIBP: conditional, RSB filling,
    PBRSB-eIBRS: Not affected
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort mitigation: TSX disabled
Graphics:
  Device-1: Intel CoffeeLake-H GT2 [UHD Graphics 630] vendor: Dell driver: i915 v: kernel
    arch: Gen-9.5 process: Intel 14nm built: 2016-20 ports: active: eDP-1 empty: DP-1,DP-2,DP-3
    bus-ID: 00:02.0 chip-ID: 8086:3e9b class-ID: 0300
  Device-2: NVIDIA GP107GLM [Quadro P1000 Mobile] vendor: Dell driver: N/A alternate: nouveau
    non-free: 530.xx+ status: current (as of 2023-03) arch: Pascal code: GP10x process: TSMC 16nm
    built: 2016-21 pcie: gen: 3 speed: 8 GT/s lanes: 16 bus-ID: 01:00.0 chip-ID: 10de:1cbb
    class-ID: 0302
  Device-3: Microdia Integrated_Webcam_HD type: USB driver: uvcvideo bus-ID: 1-12:5
    chip-ID: 0c45:671d class-ID: 0e02
  Display: x11 server: X.Org v: 1.21.1.7 with: Xwayland v: 22.1.9 compositor: kwin_x11 driver: X:
    loaded: modesetting unloaded: fbdev,vesa dri: iris gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.00x11.22") s-diag: 582mm (22.93")
  Monitor-1: eDP-1 model: Sharp 0x149a built: 2018 res: 1920x1080 hz: 60 dpi: 142 gamma: 1.2
    size: 344x194mm (13.54x7.64") diag: 395mm (15.5") ratio: 16:9 modes: 1920x1080
  API: OpenGL v: 4.6 Mesa 23.1.2-1~mx23ahs renderer: Mesa Intel UHD Graphics 630 (CFL GT2)
    direct-render: Yes
Audio:
  Device-1: Intel Cannon Lake PCH cAVS vendor: Dell driver: snd_hda_intel v: kernel
    alternate: snd_soc_skl,snd_sof_pci_intel_cnl bus-ID: 00:1f.3 chip-ID: 8086:a348 class-ID: 0403
  API: ALSA v: k6.1.0-10-amd64 status: kernel-api tools: alsamixer,amixer
  Server-1: PipeWire v: 0.3.65 status: active with: 1: pipewire-pulse status: active
    2: wireplumber status: active 3: pipewire-alsa type: plugin 4: pw-jack type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Intel Wireless-AC 9260 driver: iwlwifi v: kernel modules: wl pcie: gen: 2 speed: 5 GT/s
    lanes: 1 bus-ID: 3b:00.0 chip-ID: 8086:2526 class-ID: 0280
  IF: wlan0 state: up mac: <filter>
  IF-ID-1: tailscale0 state: unknown speed: -1 duplex: full mac: N/A
  IF-ID-2: virbr0 state: down mac: <filter>
  IF-ID-3: ztnfahjkne state: unknown speed: 10 Mbps duplex: full mac: <filter>
Bluetooth:
  Device-1: Intel Wireless-AC 9260 Bluetooth Adapter type: USB driver: btusb v: 0.8 bus-ID: 1-4:3
    chip-ID: 8087:0025 class-ID: e001
  Report: hciconfig ID: hci0 rfk-id: 3 state: up address: <filter> bt-v: 3.0 lmp-v: 5.1
    sub-v: 100 hci-v: 5.1 rev: 100
  Info: acl-mtu: 1021:4 sco-mtu: 96:6 link-policy: rswitch sniff link-mode: peripheral accept
    service-classes: rendering, capturing, object transfer, audio, telephony
Drives:
  Local Storage: total: 931.51 GiB used: 137.89 GiB (14.8%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung model: SSD 980 1TB size: 931.51 GiB
    block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 3B4QFXO7 temp: 30.9 C scheme: GPT
Partition:
  ID-1: / raw-size: 930.25 GiB size: 914.57 GiB (98.31%) used: 136.98 GiB (15.0%) fs: ext4
    dev: /dev/dm-0 maj-min: 253:0 mapped: luks-<filter>
  ID-2: /boot raw-size: 1024 MiB size: 973.4 MiB (95.06%) used: 927 MiB (95.2%) fs: ext4
    dev: /dev/nvme0n1p2 maj-min: 259:2
  ID-3: /boot/efi raw-size: 256 MiB size: 252 MiB (98.46%) used: 274 KiB (0.1%) fs: vfat
    dev: /dev/nvme0n1p1 maj-min: 259:1
Swap:
  Kernel: swappiness: 15 (default 60) cache-pressure: 100 (default)
  ID-1: swap-1 type: file size: 36.97 GiB used: 0 KiB (0.0%) priority: -2 file: /swap/swap
  ID-2: swap-2 type: zram size: 23.13 GiB used: 1024 KiB (0.0%) priority: 100 dev: /dev/zram0
Sensors:
  System Temperatures: cpu: 50.0 C pch: 44.0 C mobo: 49.0 C
  Fan Speeds (RPM): cpu: 2520 fan-1: 2493
Repos:
  Packages: 2714 pm: dpkg pkgs: 2699 libs: 1488 tools: apt,apt-get,aptitude,nala pm: rpm pkgs: 0
    pm: flatpak pkgs: 15
  No active apt repos in: /etc/apt/sources.list
  Active apt repos in: /etc/apt/sources.list.d/1password.list
    1: deb [arch=amd64 signed-by=/usr/share/keyrings/1password-archive-keyring.gpg] https://downloads.1password.com/linux/debian/amd64 stable main
  Active apt repos in: /etc/apt/sources.list.d/debian-stable-updates.list
    1: deb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
  Active apt repos in: /etc/apt/sources.list.d/debian.list
    1: deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware
    2: deb http://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
  Active apt repos in: /etc/apt/sources.list.d/microsoft-edge.list
    1: deb [arch=amd64] https://packages.microsoft.com/repos/edge/ stable main
  Active apt repos in: /etc/apt/sources.list.d/mx.list
    1: deb http://mirrors.rit.edu/mxlinux/mx-packages/mx/repo/ bookworm main non-free
    2: deb http://mirrors.rit.edu/mxlinux/mx-packages/mx/repo/ bookworm ahs
  Active apt repos in: /etc/apt/sources.list.d/signal-xenial-added-by-mxpi.list
    1: deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main
  Active apt repos in: /etc/apt/sources.list.d/tailscale.list
    1: deb [signed-by=/usr/share/keyrings/tailscale-archive-keyring.gpg] https://pkgs.tailscale.com/stable/debian bookworm main
  Active apt repos in: /etc/apt/sources.list.d/zerotier.list
    1: deb http://download.zerotier.com/debian/bookworm bookworm main
Info:
  Processes: 298 Uptime: 1h 15m wakeups: 5659 Memory: 30.85 GiB used: 5.14 GiB (16.7%)
  Init: systemd v: 252 target: graphical (5) default: graphical tool: systemctl Compilers:
  gcc: 12.2.0 alt: 12 Client: shell wrapper v: 5.2.15-release inxi: 3.3.26
Boot Mode: UEFI

[CharlesV]

Interested in that zram swap :-)

have you tried running without that and if so are you still seeing crashes / lockups ?

Your machine has enough ram, and a simple, small swap file probably wont even be used... so why the zram swap?

And I dont recall if you tried it... but have you tried a liquroix kernel?

[l0dr3]

@Danathar

Kernel: 6.1.0-10-amd64 [6.1.38-2]

Just from my experience from the last months: i found the whole 6.1.xx kernel releases very unstable in conjunction with intel integrated GPUs of all ages, so i upgraded all my intel-gpu-driven devices to at least kernels >=6.4.xx (AHS ones and liquorix ones, both work like a charm )

greetz l0dr3

[Danathar]

@Danathar

Kernel: 6.1.0-10-amd64 [6.1.38-2]

Just from my experience from the last months: i found the whole 6.1.xx kernel releases very unstable in conjunction with intel integrated GPUs of all ages, so i upgraded all my intel-gpu-driven devices to at least kernels >=6.4.xx (AHS ones and liquorix ones, both work like a charm )

greetz l0dr3

I ran with both those kernels and still got crashes :( Thanks for the suggestion though.