This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.
Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. Once this bug is reported upstream, please add the tag: 'kernel-bug- reported-upstream'. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged ** Also affects: linux (Ubuntu Cosmic) Importance: High Status: Triaged ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => High ** Changed in: linux (Ubuntu Bionic) Status: New => Triaged -- 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/1783957 Title: Nouveau crashes at login with Kernel 4.15.0-29 on MacBook Air, so no login screen in a normal sequence Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Status in linux source package in Cosmic: Triaged Bug description: I have a MacBook Air laptop which is running Linux (Kubuntu 16.04.5 LTS) with NVidia Graphics Card, KDE, Xorg, SDDM, and so on... Clean and natural install, no funky custom kernel or drivers or anything... Everything worked fine (with the 4.13.* kernel) until I've upgraded all my packages (which included the "wonderful" 4.15.0-29 kernel, which broke my system). Now, everytime I try to boot normally, it asks me for my disk password (I have an encrypted LVM) and after that, guess what ?: blank screen. The login screen does not appear. I can switch the Terminals with Ctrl+Alt+Fx, however. However, the same kernel, if I boot it in recovery mode and then I select "Resume", the login screen appears, but it lags a little bit... Needless to say, if I boot the older kernel (4.13), everything works perfectly. I dug up some logs and found something like "sddm-greeter" segmentation fault in nouveau_dri.so or something like this. So, it looks like the new kernel doesn't quite seem to look eye-to-eye with nouveau drivers... And no, I don't want the NVidia proprietary drivers because I get along just perfectly with Nouveau on other machines, and I don't want to reinstall nvidia drivers everytime I'm upgrading the kernel. And yes, I already have "haveged" installed, to provide sufficient entropy (I saw that the possible lack of entropy might be a problem in some cases)... If I boot in recovery mode and then select "resume", everything works. So, what is going on ? Any help would be appreciated... ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.15.0-29.31~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-29-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CurrentDesktop: KDE Date: Fri Jul 27 10:40:31 2018 InstallationDate: Installed on 2018-07-04 (22 days ago) InstallationMedia: Kubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228) SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783957/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
