** Description changed: - Ubuntu 18.04 startup slowdowns for 30-60 seconds when zram-config installed or swap is encrypted. + [Impact] + + Ubuntu 18.04 startup slowdowns for 30-120 seconds when zram swap is enabled (for example zram-config installed) or swap is encrypted. + Today lots of users have SSD instead of HDD disk drives and use zram swap instead of swap partition or swap file, but if initrd is generated when zram swap is enabled then system can become "unbootable" from the user's perspective (Users with SSD storage doesn't wait 2 or more minutes...) + + This bug is already fixed in Debian initramfs-tools ver 0.132, please accept this simple 3 lines patch from Debian into Ubuntu 18.04 LTS + https://salsa.debian.org/kernel-team/initramfs-tools/commit/312393b0cf1231125eeff3d1a2b6b778a935c21d + + [Test Case] + Install zram-config package and regenerate and initrd, for example with + sudo update-initramfs -u + When generating initrd I get this message in terminal: I: The initramfs will attempt to resume from /dev/zram0 I: (UUID=e380356c-767e-4265-98da-8be62ad28569) - I: Set the RESUME variable to override this.###########################################.................] + I: Set the RESUME variable to override this.###########################################.................] So the local-premount script in initramfs was waiting for a swap device that was not available, until it timed out. The relevant message was gave up waiting for suspend/resume device. - To disable this (as resuming from swap is not possible with an encrypted - swap, and I don't use hibernation anyway), I modified this file: /etc - /initramfs-tools/conf.d/resume. In this file, a line with RESUME=none - (instead of the UUID that was here) will disable waiting for a resume - device. + [Regression Potential] - Run sudo update-initramfs -u to apply the changes. + None, patch simply adds case for /dev/zram*: - Please, fix it already. Duplicate of Bug #1768230 on Ubuntu 18.10 + 60 case "$resume_auto" in + 61 /dev/zram*) + 62 ephemeral=true + 63 ;; + 64 esac + + + [Other Info] + Manual method to disable this (as resuming from swap is not possible with an encrypted or zram swap): modify file /etc/initramfs-tools/conf.d/resume - add (or change) line + RESUME=none + (instead of the UUID that was here) will disable waiting for a resume device. + and run sudo update-initramfs -u to apply the changes.
** Summary changed: - Slow startup with zram-config installed (/dev/zram0) or encrypted swap + [SRU] Slow startup with zram-config installed (/dev/zram0) or encrypted swap -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1781746 Title: [SRU] Slow startup with zram-config installed (/dev/zram0) or encrypted swap To manage notifications about this bug go to: https://bugs.launchpad.net/baltix-default-settings/+bug/1781746/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
