I can confirm what appears to be the same issue on a Lenovo ThinkPad P50, still present with Ubuntu 26.04 LTS and kernel 7.0.
Hardware Lenovo ThinkPad P50 Machine type/model: 20EQS00700 BIOS: N1EETA2W (1.75) BIOS release date: 03/18/2024 Intel HD Graphics 530 NVIDIA Quadro M1000M Software Linux pluto 7.0.0-30-generic #30-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 31 18:22:54 UTC 2026 x86_64 GNU/Linux PRETTY_NAME="Ubuntu 26.04 LTS" NAME="Ubuntu" VERSION_ID="26.04" VERSION="26.04 LTS (Resolute Raccoon)" VERSION_CODENAME=resolute The machine is actually running Kubuntu 26.04 LTS. The NVIDIA Quadro M1000M is currently using the proprietary Ubuntu NVIDIA 580 driver. PRIME is configured as: prime-select query on-demand Previously the machine was using nouveau. Installing the proprietary NVIDIA 580 driver fixed unrelated graphical problems, but it did not change the suspend/resume problem. Suspend behaviour The system uses: cat /sys/power/mem_sleep s2idle [deep] Running systemctl suspend starts the suspend process and the machine appears to shut down most of the way. However, the machine does not enter a state from which it can resume normally. One of the status LEDs remains lit and pressing the power button does not resume the system. The only way to recover is to hold the power button for several seconds until the machine is completely powered off. Afterwards, pressing the power button once starts the machine normally again. The same behaviour also occurs when suspending by closing the lid. TPM messages The kernel log contains the following TPM-related messages during boot: [ 0.000000] efi: SMBIOS=0x56fd4000 ACPI=0x57ffd000 ACPI 2.0=0x57ffd014 ESRT=0x56e64000 MOKvar=0x56e4b000 INITRD=0x4bf22598 RNG=0x57fc8f98 TPMEventLog=0x41fdc018 [ 0.000000] TPM Final Events table not present [ 0.016021] ACPI: SSDT 0x0000000057FFA000 0004B7 (v02 LENOVO Tpm2Tabl 00001000 INTL 20141107) [ 0.016029] ACPI: TPM2 0x0000000057FF8000 000034 (v03 LENOVO TP-N1E 00001750 PTEC 00000002) [ 0.016118] ACPI: Reserving TPM2 table memory at [mem 0x57ff8000-0x57ff8033] [ 3.759728] tpm tpm0: Operation Timed out [ 7.222051] tpm tpm0: Operation Timed out [ 7.222060] tpm_crb MSFT0101:00: probe with driver tpm_crb failed with error -62 [ 7.274379] ima: No TPM chip found, activating TPM-bypass! The particularly suspicious lines are: tpm tpm0: Operation Timed out tpm tpm0: Operation Timed out tpm_crb MSFT0101:00: probe with driver tpm_crb failed with error -62 ima: No TPM chip found, activating TPM-bypass! I have tested disabling the Security Chip in the BIOS. This will solve the problem. It is notable that this problem is still reproducible on the ThinkPad P50 with the latest Lenovo BIOS 1.75 and Ubuntu 26.04 LTS. Karsten Schmidt [email protected] Linux pluto 7.0.0-30-generic #30-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 31 18:22:54 UTC 2026 x86_64 GNU/Linux cat /etc/os-release PRETTY_NAME="Ubuntu 26.04 LTS" NAME="Ubuntu" VERSION_ID="26.04" VERSION="26.04 LTS (Resolute Raccoon)" VERSION_CODENAME=resolute ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=resolute LOGO=ubuntu-logo sudo dmidecode -s system-product-name --> 20EQS00700 sudo dmidecode -s bios-version --> N1EETA2W (1.75 ) sudo dmidecode -s bios-release-date --> 03/18/2024 cat /sys/power/mem_sleep --> s2idle [deep] sudo dmesg | grep - tpm [ 0.000000] efi: SMBIOS=0x56fd4000 ACPI=0x57ffd000 ACPI 2.0=0x57ffd014 ESRT=0x56e64000 MOKvar=0x56e4b000 INITRD=0x4bf22598 RNG=0x57fc8f98 TPMEventLog=0x41fdc018 [ 0.000000] TPM Final Events table not present [ 0.016021] ACPI: SSDT 0x0000000057FFA000 0004B7 (v02 LENOVO Tpm2Tabl 00001000 INTL 20141107) [ 0.016029] ACPI: TPM2 0x0000000057FF8000 000034 (v03 LENOVO TP-N1E 00001750 PTEC 00000002) [ 0.016118] ACPI: Reserving TPM2 table memory at [mem 0x57ff8000-0x57ff8033] [ 3.759728] tpm tpm0: Operation Timed out [ 7.222051] tpm tpm0: Operation Timed out [ 7.222060] tpm_crb MSFT0101:00: probe with driver tpm_crb failed with error -62 [ 7.274379] ima: No TPM chip found, activating TPM-bypass! [ 18.547359] systemd[1]: systemd 259.5-0ubuntu3.4 running in system mode (+PAM +AUDIT +SELINUX +APPARMOR +IMA +IPE +SMACK +SECCOMP +GCRYPT -GNUTLS +OPENSSL +ACL +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +KMOD +LIBCRYPTSETUP +LIBCRYPTSETUP_PLUGINS +LIBFDISK +PCRE2 +PWQUALITY +P11KIT +QRENCODE +TPM2 +BZIP2 +LZ4 +XZ +ZLIB +ZSTD +BPF_FRAMEWORK +BTF -XKBCOMMON -UTMP +SYSVINIT +LIBARCHIVE) [ 18.882863] systemd[1]: systemd-pcrextend.socket - TPM PCR Measurements skipped, unmet condition check ConditionSecurity=measured-uki [ 18.882880] systemd[1]: systemd-pcrlock.socket - Make TPM PCR Policy skipped, unmet condition check ConditionSecurity=measured-uki [ 18.917140] systemd[1]: systemd-pcrmachine.service - TPM PCR Machine ID Measurement skipped, unmet condition check ConditionSecurity=measured-uki [ 18.917208] systemd[1]: systemd-pcrproduct.service - TPM NvPCR Product ID Measurement skipped, unmet condition check ConditionSecurity=measured-uki [ 18.919903] systemd[1]: systemd-tpm2-setup-early.service - Early TPM SRK Setup skipped, unmet condition check ConditionSecurity=measured-uki [ 18.984618] systemd[1]: systemd-tpm2-setup.service - TPM SRK Setup skipped, unmet condition check ConditionSecurity=measured-uki [ 18.984660] systemd[1]: systemd-pcrnvdone.service - TPM PCR NvPCR Initialization Separator skipped, unmet condition check ConditionSecurity=measured-uki -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1971567 Title: TPM breaks resume from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1971567/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
