It is now clear that this fault applies to Ubuntu 16.04, not to any specific Linux kernel version. I have found that Ubuntu 17.10 with the same current Linux (4.13 35/40) does not have the fault, but 16.04.3 running on the same hardware and with the same Linux does show the fault: boot-up only progresses to a frozen log-in screen, and the build will only run in recovery mode. The previously reported screen handling problems are almost certainly due to the known reduced display support in this recovery mode, and are not the real fault, which is that these 16.04 builds won't boot-up.
** Summary changed: - Desktop system won't run with latest kernel 4.13 36/40 + Desktop system won't run with latest 16.04 build -- 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/1754571 Title: Desktop system won't run with latest 16.04 build Status in linux package in Ubuntu: Confirmed Bug description: My Intel-based desktop system was working fine with Ubuntu 16.04.3 and Linux 4.13 32/35 up to 12 Feb 18. Since then it has been unable to complete a boot-up, and will only run in recovery-mode. I have found similar symptoms as were previously raised in bug 1568211. These are the boot messages: :~$ sudo dmesg | egrep 'drm|radeon' [ 1.803359] [drm] VGACON disable radeon kernel modesetting. [ 1.803429] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! [ 8.597977] [drm] VGACON disable radeon kernel modesetting. [ 8.598047] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! [ 29.552451] [drm] VGACON disable radeon kernel modesetting. [ 29.552497] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! --- ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: richard 1817 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=4b36ebcc-b1ad-499c-96c6-a1706f5c11a7 InstallationDate: Installed on 2018-02-21 (16 days ago) InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) Package: linux (not installed) ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-36-generic root=UUID=d5aa5d6c-b0b8-4b3c-8016-25e0c3efb9ef ro recovery nomodeset ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13 RelatedPackageVersions: linux-restricted-modules-4.13.0-36-generic N/A linux-backports-modules-4.13.0-36-generic N/A linux-firmware 1.157.17 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: xenial Uname: Linux 4.13.0-36-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/19/2010 dmi.bios.vendor: Intel Corp. dmi.bios.version: WBIBX10J.86A.0293.2010.0419.1819 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: DP55WB dmi.board.vendor: Intel Corporation dmi.board.version: AAE64798-205 dmi.chassis.type: 2 dmi.modalias: dmi:bvnIntelCorp.:bvrWBIBX10J.86A.0293.2010.0419.1819:bd04/19/2010:svn:pn:pvr:rvnIntelCorporation:rnDP55WB:rvrAAE64798-205:cvn:ct2:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1754571/+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
