Thanks Joseph, thanks Christopher. Firstlly I updated the firmware, now it is 2.16. The bug was still there.
Then I installed .deb kernel whith dpkg -i from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-trusty/. Exactly I installed : linux-headers-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb linux-headers-3.13.0-031300_3.13.0-031300.201401192235_all.deb linux-image-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb Then rebooted and checked with uname -a : 3.13.0-031300-generic Nothing changed. Anyway one thing I noticed in dmesg is [ 23.595259] [drm:radeon_acpi_init] *ERROR* Cannot find a backlight controller [ 23.595411] [drm] Initialized radeon 2.36.0 20080528 for 0000:01:00.0 on minor 1 Please let me know if I tested the latest mainline kernel correctly. ** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1273369 Title: [Acer Aspire V5-551G] late resume failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1273369/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
