I forgot to say that the problem was there from the first boot. Only kernel versions higher than 4.6 can suspend, but flickering and intel display driver bug is present in all versions.
** Description changed: Lenovo B51 with Ubuntu Mate 16.04, fresh and up to date installed. The system fails to suspend from any known method (dm menu, session menu, pm-suspend). Hard reset required after every attempt. This bug also affects Lenovo G50 series - Kubuntu 16.04 This bug is easily replicable all the time. just type pm-suspend - ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-15-generic 4.4.0-15.31 ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6 Uname: Linux 4.4.0-15-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: sergio 1920 F...m pulseaudio /dev/snd/controlC0: sergio 1920 F.... pulseaudio CurrentDesktop: MATE Date: Mon Mar 21 21:12:47 2016 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=b2e611bd-bf9b-4a08-a32f-f2691d75c3c9 InstallationDate: Installed on 2016-03-21 (0 days ago) InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 8087:0a2a Intel Corp. Bus 001 Device 002: ID 174f:14f2 Syntek Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 80LM ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-15-generic root=UUID=15117e0b-6e2f-4471-83be-5d0c22689f0f ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-15-generic N/A linux-backports-modules-4.4.0-15-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/12/2015 dmi.bios.vendor: LENOVO dmi.bios.version: D7CN15WW(V1.01) dmi.board.asset.tag: NO Asset Tag dmi.board.name: Lenovo B51-80 dmi.board.vendor: LENOVO dmi.board.version: No DPK dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo B51-80 dmi.modalias: dmi:bvnLENOVO:bvrD7CN15WW(V1.01):bd08/12/2015:svnLENOVO:pn80LM:pvrLenovoB51-80:rvnLENOVO:rnLenovoB51-80:rvrNoDPK:cvnLENOVO:ct10:cvrLenovoB51-80: dmi.product.name: 80LM dmi.product.version: Lenovo B51-80 dmi.sys.vendor: LENOVO ** Tags added: kernel-fixed-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1560202 Title: [LENOVO 80LM] suspend/resume failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1560202/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs