Seems like proprietary Nvidia driver is not there for your graphics card:
Kernel modules: nvidiafb, nouveau
** Also affects: nvidia-graphics-drivers (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1806852
Title:
the 4.15.0.42 kernel causes a slower PC
Status in linux package in Ubuntu:
Confirmed
Status in nvidia-graphics-drivers package in Ubuntu:
New
Bug description:
kernel(64bits) 4.15.0.42 causes a slowdown of the PC, reduces the size of the
display, and a blocking if I try to run "NVIDIA X Server Settings". If I chose
the kernel 4.15.0.39 at startup the operation of ubuntu is normal.
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ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jojo 1715 F.... pulseaudio
/dev/snd/controlC0: jojo 1715 F.... pulseaudio
CurrentDesktop: KDE
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=5bc4301e-f8ce-487d-a740-e39dfd66f73a
InstallationDate: Installed on 2017-04-15 (598 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
IwConfig:
lo no wireless extensions.
enp1s7 no wireless extensions.
enp0s10 no wireless extensions.
Lsusb:
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Package: linux (not installed)
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-42-generic
root=UUID=6bef0add-9945-4094-b0b2-c7c5ebc3d17a ro
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-42-generic N/A
linux-backports-modules-4.15.0-42-generic N/A
linux-firmware 1.173.2
RfKill:
Tags: bionic
Uname: Linux 4.15.0-42-generic x86_64
UpgradeStatus: Upgraded to bionic on 2018-05-07 (211 days ago)
UserGroups: adm audio cdrom dialout disk plugdev scanner sudo tty wireshark
_MarkForUpload: True
dmi.bios.date: 01/13/2006
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F6
dmi.board.name: GA-K8NF-9
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF6:bd01/13/2006:svn:pn:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-K8NF-9:rvrx.x:cvn:ct3:cvr:
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