Dell has stated that this has been tested on systems with both AMD and Intel CPU's
mproved boot up time in Performance Per Watt (DAPC) before/after boot times results, With PATCH ==================== # systemd-analyze Startup finished in 13.569s (kernel) + 9.136s (userspace) = 22.705s graphical.target reached after 8.460s in userspace # systemd-analyze Startup finished in 13.188s (kernel) + 8.504s (userspace) = 21.692s graphical.target reached after 8.123s in userspace # systemd-analyze Startup finished in 13.720s (kernel) + 9.235s (userspace) = 22.956s graphical.target reached after 8.807s in userspace # systemd-analyze Startup finished in 13.967s (kernel) + 8.896s (userspace) = 22.863s graphical.target reached after 8.489s in userspace WithOut PATCH ==================== # systemd-analyze Startup finished in 14.137s (kernel) + 14.879s (userspace) = 29.016s graphical.target reached after 14.460s in userspace # systemd-analyze Startup finished in 14.149s (kernel) + 12.344s (userspace) = 26.494s graphical.target reached after 11.900s in userspace # systemd-analyze Startup finished in 14.434s (kernel) + 13.047s (userspace) = 27.481s graphical.target reached after 12.602s in userspace # systemd-analyze Startup finished in 14.462s (kernel) + 12.908s (userspace) = 27.371s graphical.target reached after 12.481s in userspace -- 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/2008527 Title: [SRU]With "Performance per Watt (DAPC)" enabled in the BIOS, Bootup time is taking longer than expected Status in linux package in Ubuntu: In Progress Status in linux source package in Jammy: In Progress Bug description: SRU Justification: [Impact] A Dell system that has a profile setting of "Performance Per Watt (DAPC)" enabled in the BIOS and running Ubuntu-22.04 does not boot into OS as quickly as expected. How reproducible: Steps to Reproduce: 1. On the Dell system enable "Performance Per Watt (DAPC)" from BIOS. 2. Install Ubuntu-22.04 3. Boot into OS 4. Check the bootup time Expected results: OS should boot normally and need to consume less bootup time [Fix] 13fdbc8b8da6 cpufreq: ACPI: Defer setting boost MSRs [Test Plan] 1. Set system profile as "Performance Per Watt (DAPC)" from BIOS setting 2. Install Ubuntu-22.04 3. Boot into OS 4. Check the bootup time [Where problems could occur] Regression risk: low to medium. [Other Info] https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/lp_2008527_dapc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2008527/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
