Public bug reported: I'm running 24.04 LTS with the TPM-FDE option, so the kernel is installed as a snap.
I switched from 6.8.0-100 to 6.8.0-106 yesterday by running "snap refresh pc-kernel --channel=24/candidate" and now the i915 drivers throws weird stacktraces on wakeup from standby and when I connect the laptop to my docking station, the screen goes black for quite some time and then comes back, but I get no output on the external monitor. It works, though, when I boot the laptop while it is plugged in to the dock. > snap info pc-kernel name: pc-kernel summary: The Canonical amd64 and arm64 kernel publisher: Canonical✓ store-url: https://snapcraft.io/pc-kernel contact: [email protected] license: unset description: | The `pc-kernel` snap delivers various Ubuntu kernel variants as snaps across tracks and risk channels. The `pc-kernel` snaps in each risk channel serve a specific purpose: * **edge** - Snaps are unsigned and intended for simple boot testing. * **beta** - Snaps are signed and intended for automation testing. * **candidate** - Snaps are signed and intended for further acceptance testing in QA. * **stable** - Release channel; only promoted to **stable** once all testing, sign-off and cycle boundaries are satisfied. You can differentiate between series-specific `pc-kernel` snaps by the store track. * Ubuntu LTS releases - These snaps align with Ubuntu Core releases and are marked by the Ubuntu Core release years (e.g. **22**/<channel>, **24**/<channel>). * Ubuntu interim releases - The tracks contain the full release version number (e.g. **23.10**/<channel>, **25.04**/<channel>). * HWE kernels - Ubuntu LTS series that have a HWE kernel will be placed on HWE-specific tracks (e.g. **22-hwe**/<channel>, **24-rt-hwe**/<channel>). * OEM kernels - Ubuntu LTS series that have an OEM kernel will be placed on HWE-specific tracks (e.g. **22-oem**/<channel>). * Edge kernels - Edge kernel snaps are unsupported “preview” or “early access” versions and will be rolled into the next LTS HWE kernel (e.g. **24-hwe-edge**/<channel>). For example, the "24-hwe-edge/<channel>” snap will get rolled to the "24-hwe/<channel>” snap. * Real-time kernels - These tracks are public versions of the real-time kernel (e.g. **25.04-rt**/<channel>). See also: * https://ubuntu.com/kernel * https://canonical-kernel-docs.readthedocs-hosted.com/latest/reference/snap-lifecycle/ * https://canonical-kernel-docs.readthedocs-hosted.com/latest/reference/oem-kernels/ * https://canonical-kernel-docs.readthedocs-hosted.com/latest/reference/hwe-kernels/ * https://ubuntu.com/core type: kernel snap-id: pYVQrBcKmBa0mZ4CCN7ExT6jH8rY1hza tracking: 24/candidate refresh-date: gestern um 11:10 CEST channels: latest/stable: 4.4.0-278.312 2026-03-03 (3189) 188MB - latest/candidate: 4.4.0-279.313 2026-03-18 (3306) 191MB - latest/beta: 4.4.0-279.313 2026-03-18 (3306) 191MB - latest/edge: 4.4.0-279.313 2026-03-13 (3287) 191MB - 26.04/stable: 7.0.0-10.10 2026-03-25 (3317) 381MB - 26.04/candidate: 6.19.0-6.6 2026-03-03 (3246) 369MB - 26.04/beta: 7.0.0-6.6 2026-03-11 (3256) 377MB - 26.04/edge: 7.0.0-6.6 2026-03-11 (3254) 377MB - 26-rt/stable: 7.0.0-10.10.3 2026-03-30 (3320) 381MB - 26-rt/candidate: 7.0.0-10.10.3 2026-03-25 (3320) 381MB - 26-rt/beta: 7.0.0-10.10.3 2026-03-25 (3320) 381MB - 26-rt/edge: 7.0.0-10.10.3 2026-03-25 (3318) 381MB - 26/stable: 7.0.0-10.10 2026-03-25 (3317) 381MB - 26/candidate: 6.19.0-6.6 2026-03-03 (3246) 369MB - 26/beta: 7.0.0-6.6 2026-03-11 (3256) 377MB - 26/edge: 7.0.0-6.6 2026-03-11 (3254) 377MB - 25.10-rt/stable: 6.17.0-1008.9 2026-03-19 (3284) 218MB - 25.10-rt/candidate: 6.17.0-1010.11 2026-03-30 (3326) 218MB - 25.10-rt/beta: 6.17.0-1010.11 2026-03-26 (3326) 218MB - 25.10-rt/edge: 6.17.0-1010.11 2026-03-24 (3315) 218MB - 25.10/stable: 6.17.0-19.19 2026-03-18 (3282) 221MB - 25.10/candidate: 6.17.0-22.22 2026-03-30 (3327) 220MB - 25.10/beta: 6.17.0-22.22 2026-03-26 (3327) 220MB - 25.10/edge: 6.17.0-22.22 2026-03-18 (3307) 220MB - 25.04-rt/stable: 6.14.0-1016.16 2025-11-20 (2944) 375MB - 25.04-rt/candidate: 6.14.0-1016.16 2025-10-22 (2944) 375MB - 25.04-rt/beta: 6.14.0-1016.16 2025-10-22 (2944) 375MB - 25.04-rt/edge: 6.14.0-1016.16 2025-10-21 (2942) 375MB - 25.04/stable: 6.14.0-36.36 2025-11-20 (2940) 377MB - 25.04/candidate: 6.14.0-36.36 2025-10-21 (2940) 377MB - 25.04/beta: 6.14.0-36.36 2025-10-20 (2940) 377MB - 25.04/edge: 6.14.0-36.36 2025-10-20 (2936) 377MB - 24.10-rt/stable: 6.11.0-1011.11 2025-06-26 (2503) 359MB - 24.10-rt/candidate: 6.11.0-1011.11 2025-05-26 (2503) 359MB - 24.10-rt/beta: 6.11.0-1011.11 2025-05-24 (2503) 359MB - 24.10-rt/edge: 6.11.0-1011.11 2025-05-23 (2499) 359MB - 24.10/stable: 6.11.0-28.28 2025-06-26 (2490) 361MB - 24.10/candidate: 6.11.0-28.28 2025-05-21 (2490) 361MB - 24.10/beta: 6.11.0-28.28 2025-05-21 (2490) 361MB - 24.10/edge: 6.11.0-28.28 2025-05-20 (2483) 361MB - 24-rt-hwe-edge/stable: 6.17.0-1008.9~24.04.1 2026-03-19 (3289) 394MB - 24-rt-hwe-edge/candidate: 6.17.0-1010.11~24.04.1 2026-03-30 (3330) 394MB - 24-rt-hwe-edge/beta: 6.17.0-1010.11~24.04.1 2026-03-26 (3330) 394MB - 24-rt-hwe-edge/edge: 6.17.0-1010.11~24.04.1 2026-03-26 (3322) 388MB - 24-rt-hwe/stable: 6.17.0-1008.9~24.04.1 2026-03-19 (3289) 394MB - 24-rt-hwe/candidate: 6.17.0-1010.11~24.04.1 2026-03-30 (3330) 394MB - 24-rt-hwe/beta: 6.17.0-1010.11~24.04.1 2026-03-26 (3330) 394MB - 24-rt-hwe/edge: 6.17.0-1010.11~24.04.1 2026-03-26 (3322) 388MB - 24-rt/stable: 6.8.1-1045.46 2026-03-19 (3288) 367MB - 24-rt/candidate: 6.8.1-1045.46 2026-03-13 (3288) 367MB - 24-rt/beta: 6.8.1-1045.46 2026-03-13 (3288) 367MB - 24-rt/edge: 6.8.1-1044.45 2026-02-24 (3218) 362MB - 24-hwe-edge/stable: 6.17.0-14.14~24.04.1 2026-02-10 (3159) 394MB - 24-hwe-edge/candidate: 6.17.0-19.19~24.04.2 2026-03-31 (3301) 396MB - 24-hwe-edge/beta: 6.17.0-19.19~24.04.2 2026-03-17 (3301) 396MB - 24-hwe-edge/edge: 6.17.0-16.16~24.04.1 2026-02-13 (3186) 394MB - 24-hwe/stable: 6.17.0-14.14~24.04.1 2026-02-10 (3159) 394MB - 24-hwe/candidate: 6.17.0-19.19~24.04.2 2026-03-31 (3301) 396MB - 24-hwe/beta: 6.17.0-19.19~24.04.2 2026-03-18 (3301) 396MB - 24-hwe/edge: 6.17.0-16.16~24.04.1 2026-03-18 (3186) 394MB - 24/stable: 6.8.0-106.106 2026-03-30 (3272) 327MB - 24/candidate: 6.8.0-106.106 2026-03-13 (3272) 327MB - 24/beta: 6.8.0-106.106 2026-03-13 (3272) 327MB - 24/edge: 6.8.0-104.104 2026-03-12 (3270) 325MB - 23.10/stable: 6.5.0.44.44 2024-07-10 (1881) 296MB - 23.10/candidate: 6.5.0.44.44 2024-06-11 (1881) 296MB - 23.10/beta: 6.5.0.44.44 2024-06-10 (1881) 296MB - 23.10/edge: 6.5.0.44.44 2024-06-08 (1877) 296MB - 22-rt-hwe/stable: 6.8.1-1045.46~22.04.1 2026-03-19 (3291) 347MB - 22-rt-hwe/candidate: 6.8.1-1045.46~22.04.1 2026-03-13 (3291) 347MB - 22-rt-hwe/beta: 6.8.1-1045.46~22.04.1 2026-03-13 (3291) 347MB - 22-rt-hwe/edge: 6.8.1-1044.45~22.04.1 2026-03-13 (3276) 346MB - 22-rt/stable: 5.15.0-1102.111.1 2026-03-17 (3296) 250MB - 22-rt/candidate: 5.15.0-1102.111.1 2026-03-16 (3296) 250MB - 22-rt/beta: 5.15.0-1102.111.1 2026-03-16 (3296) 250MB - 22-rt/edge: 5.15.0-1102.111.1 2026-03-14 (3294) 250MB - 22-oem/stable: 6.5.0.1027.29 2024-08-08 (1954) 287MB - 22-oem/candidate: 6.5.0.1027.29 2024-07-31 (1954) 287MB - 22-oem/beta: 6.5.0.1026.28 2024-07-03 (1923) 288MB - 22-oem/edge: 6.5.0.1024.26 2024-05-20 (1843) 288MB - 22-hwe/stable: 6.8.0-106.106~22.04.1 2026-03-30 (3278) 349MB - 22-hwe/candidate: 6.8.0-106.106~22.04.1 2026-03-30 (3278) 349MB - 22-hwe/beta: 6.8.0-106.106~22.04.1 2026-03-13 (3278) 349MB - 22-hwe/edge: 6.8.0-110.110~22.04.1 2026-03-30 (3333) 348MB - 22/stable: 5.15.0-170.180.1+535.274.02 2026-02-09 (3121) 358MB - 22/candidate: 5.15.0-170.180.1+535.274.02 2026-02-03 (3121) 358MB - 22/beta: 5.15.0-173.183.1+535.288.01 2026-03-18 (3305) 358MB - 22/edge: 5.15.0-172.182.1+535.288.01 2026-02-18 (3196) 358MB - 20/stable: 5.4.0-226.246.1 2026-03-19 (3190) 404MB - 20/candidate: 5.4.0-226.246.1 2026-03-18 (3190) 404MB - 20/beta: 5.4.0-228.248.1 2026-03-26 (3324) 404MB - 20/edge: 5.4.0-228.248.1 2026-03-20 (3310) 404MB - 18/stable: 4.15.0-247.259 2026-03-18 (3188) 245MB - 18/candidate: 4.15.0-248.260 2026-03-23 (3309) 248MB - 18/beta: 4.15.0-248.260 2026-03-19 (3309) 248MB - 18/edge: 4.15.0-248.260 2026-03-19 (3308) 248MB - installed: 6.8.0-106.106 (3272) 327MB kernel I attached what I think is the relevant part of the dmesg, though ubuntu-bug should have added more. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-generic (not installed) ProcVersionSignature: Ubuntu 6.8.0-106.106-generic 6.8.12 Uname: Linux 6.8.0-106-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: niklas 5131 F.... pipewire CRDA: N/A CasperMD5CheckResult: pass CurrentDesktop: KDE Date: Tue Mar 31 12:24:56 2026 MachineType: LENOVO 21LWCTO1WW ProcFB: 0 i915drmfb ProcKernelCmdLine: snapd_recovery_mode=run console=ttyS0,115200n8 console=tty1 panic=-1 quiet splash RelatedPackageVersions: linux-restricted-modules-6.8.0-106-generic N/A linux-backports-modules-6.8.0-106-generic N/A linux-firmware N/A SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/08/2025 dmi.bios.release: 1.17 dmi.bios.vendor: LENOVO dmi.bios.version: N45ET27W (1.17 ) dmi.board.asset.tag: Not Available dmi.board.name: 21LWCTO1WW dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 31 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.12 dmi.modalias: dmi:bvnLENOVO:bvrN45ET27W(1.17):bd12/08/2025:br1.17:efr1.12:svnLENOVO:pn21LWCTO1WW:pvrThinkPadX132-in-1Gen5:rvnLENOVO:rn21LWCTO1WW:rvrNotDefined:cvnLENOVO:ct31:cvrNone:skuLENOVO_MT_21LW_BU_Think_FM_ThinkPadX132-in-1Gen5: dmi.product.family: ThinkPad X13 2-in-1 Gen 5 dmi.product.name: 21LWCTO1WW dmi.product.sku: LENOVO_MT_21LW_BU_Think_FM_ThinkPad X13 2-in-1 Gen 5 dmi.product.version: ThinkPad X13 2-in-1 Gen 5 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble ** Attachment added: "i915-dock.hang" https://bugs.launchpad.net/bugs/2146887/+attachment/5957235/+files/i915-dock.hang -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2146887 Title: laptop unable to dock since 6.8.0-106 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2146887/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
