I have run the command and deleted the PPA.But oibaf wasn't completely removed.Here is output of the command *dpkg -l | grep oibaf*
ii debhelper 13ubuntu1~oibaf~f all helper programs for debian/rules ii libdebhelper-perl 13ubuntu1~oibaf~f all debhelper perl modules ii libdrm-amdgpu1:amd64 2.4.102+git2007100630.669e10~oibaf~f amd64 Userspace interface to amdgpu-specific kernel DRM services -- runtime ii libdrm-amdgpu1:i386 2.4.102+git2007100630.669e10~oibaf~f i386 Userspace interface to amdgpu-specific kernel DRM services -- runtime ii libdrm-common 2.4.102+git2007100630.669e10~oibaf~f all Userspace interface to kernel DRM services -- common files ii libdrm-dev:amd64 2.4.102+git2007100630.669e10~oibaf~f amd64 Userspace interface to kernel DRM services -- development files ii libdrm-intel1:amd64 2.4.102+git2007100630.669e10~oibaf~f amd64 Userspace interface to intel-specific kernel DRM services -- runtime ii libdrm-intel1:i386 2.4.102+git2007100630.669e10~oibaf~f i386 Userspace interface to intel-specific kernel DRM services -- runtime ii libdrm-nouveau2:amd64 2.4.102+git2007100630.669e10~oibaf~f amd64 Userspace interface to nouveau-specific kernel DRM services -- runtime ii libdrm-nouveau2:i386 2.4.102+git2007100630.669e10~oibaf~f i386 Userspace interface to nouveau-specific kernel DRM services -- runtime ii libdrm-radeon1:amd64 2.4.102+git2007100630.669e10~oibaf~f amd64 Userspace interface to radeon-specific kernel DRM services -- runtime ii libdrm-radeon1:i386 2.4.102+git2007100630.669e10~oibaf~f i386 Userspace interface to radeon-specific kernel DRM services -- runtime ii libdrm2:amd64 2.4.102+git2007100630.669e10~oibaf~f amd64 Userspace interface to kernel DRM services -- runtime ii libdrm2:i386 2.4.102+git2007100630.669e10~oibaf~f i386 Userspace interface to kernel DRM services -- runtime ii libegl-dev:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- EGL development files ii libegl-mesa0:amd64 20.3~git2008141930.acf756~oibaf~f amd64 free implementation of the EGL API -- Mesa vendor library ii libegl1:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- EGL support ii libegl1-mesa-dev:amd64 20.3~git2008141930.acf756~oibaf~f amd64 free implementation of the EGL API -- development files ii libgbm1:amd64 20.3~git2008141930.acf756~oibaf~f amd64 generic buffer management API -- runtime ii libgl-dev:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- GL development files ii libgl1:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- legacy GL support ii libgl1:i386 1.3.2-1~oibaf~f i386 Vendor neutral GL dispatch library -- legacy GL support ii libgl1-mesa-dev:amd64 20.3~git2008141930.acf756~oibaf~f amd64 transitional dummy package ii libgl1-mesa-dri:amd64 20.3~git2008141930.acf756~oibaf~f amd64 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-dri:i386 20.3~git2008141930.acf756~oibaf~f i386 free implementation of the OpenGL API -- DRI modules ii libglapi-mesa:amd64 20.3~git2008141930.acf756~oibaf~f amd64 free implementation of the GL API -- shared library ii libglapi-mesa:i386 20.3~git2008141930.acf756~oibaf~f i386 free implementation of the GL API -- shared library ii libgles-dev:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- GLES development files ii libgles1:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- GLESv1 support ii libgles2:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- GLESv2 support ii libgles2-mesa-dev:amd64 20.3~git2008141930.acf756~oibaf~f amd64 transitional dummy package ii libglvnd-dev:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- development files ii libglvnd0:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library ii libglvnd0:i386 1.3.2-1~oibaf~f i386 Vendor neutral GL dispatch library ii libglx-dev:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- GLX development files ii libglx-mesa0:amd64 20.3~git2008141930.acf756~oibaf~f amd64 free implementation of the OpenGL API -- GLX vendor library ii libglx-mesa0:i386 20.3~git2008141930.acf756~oibaf~f i386 free implementation of the OpenGL API -- GLX vendor library ii libglx0:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- GLX support ii libglx0:i386 1.3.2-1~oibaf~f i386 Vendor neutral GL dispatch library -- GLX support ii libllvm10:amd64 1:10.0.1-1~oibaf~f amd64 Modular compiler and toolchain technologies, runtime library ii libllvm10:i386 1:10.0.1-1~oibaf~f i386 Modular compiler and toolchain technologies, runtime library ii libopengl-dev:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- OpenGL development files ii libopengl0:amd64 1.3.2-1~oibaf~f amd64 Vendor neutral GL dispatch library -- OpenGL support ii libosmesa6:amd64 20.3~git2008141930.acf756~oibaf~f amd64 Mesa Off-screen rendering extension ii libosmesa6:i386 20.3~git2008141930.acf756~oibaf~f i386 Mesa Off-screen rendering extension ii libxatracker2:amd64 20.3~git2008141930.acf756~oibaf~f amd64 X acceleration library -- runtime ii mesa-common-dev:amd64 20.3~git2008141930.acf756~oibaf~f amd64 Developer documentation for Mesa ii mesa-va-drivers:amd64 20.3~git2008141930.acf756~oibaf~f amd64 Mesa VA-API video acceleration drivers ii mesa-va-drivers:i386 20.3~git2008141930.acf756~oibaf~f i386 Mesa VA-API video acceleration drivers ii mesa-vdpau-drivers:amd64 20.3~git2008141930.acf756~oibaf~f amd64 Mesa VDPAU video acceleration drivers ii mesa-vdpau-drivers:i386 20.3~git2008141930.acf756~oibaf~f i386 Mesa VDPAU video acceleration drivers ii mesa-vulkan-drivers:amd64 20.3~git2008141930.acf756~oibaf~f amd64 Mesa Vulkan graphics drivers ii mesa-vulkan-drivers:i386 20.3~git2008141930.acf756~oibaf~f i386 Mesa Vulkan graphics drivers On Aug 18, 2020 7:05 AM, "Daniel van Vugt" <1891...@bugs.launchpad.net> wrote: > You need to install the 'ppa-purge' tool and then use that, so something > like: > > sudo apt install ppa-purge > sudo ppa-purge ppa:oibaf/graphics-drivers > > or > > sudo apt install ppa-purge > sudo ppa-purge <Hit Tab to autocomplete the command>... > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1891470 > > Title: > [amdgpu] White screen on resume from suspend > > Status in linux package in Ubuntu: > Won't Fix > Status in mutter package in Ubuntu: > Won't Fix > > Bug description: > The PC usually shows a Butter milk like screen when it wakes up from > suspension.my laptop is set to lid close to undergo suspension.when I open > the lid a paper white or Butter milk screen is shown.the only solution is > to force power of by long pressing power button. this issue is also > observed when the Ubuntu 20.04 OS starts.My PC is in dual boot. I play > videos from Windows then shutdown Windows.On the next boot I select Ubuntu > from boot options.At that time some texts are shown and after a couple of > seconds this Butter milk like screen could be observed.It maybe graphics > issue. > --- > ProblemType: Bug > ApportVersion: 2.20.11-0ubuntu27.6 > Architecture: amd64 > CasperMD5CheckResult: skip > CurrentDesktop: ubuntu:GNOME > DistroRelease: Ubuntu 20.04 > InstallationDate: Installed on 2020-06-20 (54 days ago) > InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 > (20200423) > Package: mutter 3.36.3-0ubuntu0.20.04.1 > PackageArchitecture: amd64 > ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44 > Tags: third-party-packages focal wayland-session > Uname: Linux 5.4.0-42-generic x86_64 > UpgradeStatus: No upgrade log present (probably fresh install) > UserGroups: adm cdrom dip input lpadmin lxd plugdev sambashare sudo video > _MarkForUpload: True > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/ > 1891470/+subscriptions > -- 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/1891470 Title: [amdgpu] White screen on resume from suspend Status in linux package in Ubuntu: Won't Fix Status in mutter package in Ubuntu: Won't Fix Bug description: The PC usually shows a Butter milk like screen when it wakes up from suspension.my laptop is set to lid close to undergo suspension.when I open the lid a paper white or Butter milk screen is shown.the only solution is to force power of by long pressing power button. this issue is also observed when the Ubuntu 20.04 OS starts.My PC is in dual boot. I play videos from Windows then shutdown Windows.On the next boot I select Ubuntu from boot options.At that time some texts are shown and after a couple of seconds this Butter milk like screen could be observed.It maybe graphics issue. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.6 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-06-20 (54 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) Package: mutter 3.36.3-0ubuntu0.20.04.1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44 Tags: third-party-packages focal wayland-session Uname: Linux 5.4.0-42-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip input lpadmin lxd plugdev sambashare sudo video _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891470/+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