After having played around with "prime-select" instead of using the graphical Nvidia tool my system now also boots in "on-demand" mode.
(You have to reboot after changing the settings with "prime-select".) -- 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/1911352 Title: Black screen on boot after 20.04 upgraded to kernel 5.8 Status in linux package in Ubuntu: Confirmed Bug description: Yesterday Ubuntu asked me to reboot after automatic updates, and when I rebooted it doesn't start up. Sometimes it stays on the Dell logo, sometimes it goes to a black screen and doesn't get past that (not sure what causes each variation -- perhaps for reboot it does the Dell logo, cold start up it does the black screen?). After the updates it's trying to boot the 5.8.0 kernel. In the boot menu, if I manually select the 5.4.0 kernel everything works fine. So presumably it's something about the 5.8 kernel on this hardware. When this occurred I was running the Nouveau open source graphics driver. I switched to the NVIDIA driver (460) to see if that would help, but it didn't change anything. So it may or may not be graphics related. I'm attaching my /var/log/kern.log and /var/log/syslog for yesterday -- Jan 12, I think it would be around 13:30 that I first rebooted after the upgrade (and a bunch of times after that). I ran the logs through grep -v 'var-snap-lxd-common-lxd' as a huge percentage of the lines were this (presumably irrelevant): Jan 12 19:09:55 BenXPS15 kernel: [14515.297170] audit: type=1400 audit(1610431795.003:29126): apparmor="DENIED" operation="open" namespace="root//lxd-juju-804318-0_<var-snap-lxd-common-lxd>" profile="snap.juju-db.daemon" name="/proc/631/net/netstat" pid=3906 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=1000000 ouid=1000000 For reference: * This is a Dell XPS 15 (9550) laptop with an NVIDIA GeForce GTX 960M (I think it's hybrid graphics). i7-6700HQ 2.6GHz with 8 cores, 256 GB SSD, 16 MB RAM. * I installed Ubuntu 20.04 Focal in August 2020, and now it says it's on "Ubuntu 20.04.1 LTS". * /proc/version_signature: Ubuntu 5.4.0-59.65-generic 5.4.78 * "sudo lspci -vnvn" output is included in the attached logs.zip --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.14 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ben 4518 F.... pulseaudio /dev/snd/pcmC0D0p: ben 4518 F...m pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-08-27 (138 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) MachineType: Dell Inc. XPS 15 9550 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-59-generic root=/dev/mapper/vgubuntu-root ro quiet splash ProcVersionSignature: Ubuntu 5.4.0-59.65-generic 5.4.78 RelatedPackageVersions: linux-restricted-modules-5.4.0-59-generic N/A linux-backports-modules-5.4.0-59-generic N/A linux-firmware 1.187.7 Tags: focal Uname: Linux 5.4.0-59-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip kvm libvirt lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/12/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.13.1 dmi.board.name: 0N7TVV dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.13.1:bd12/12/2019:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.family: XPS dmi.product.name: XPS 15 9550 dmi.product.sku: 06E4 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1911352/+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
