Public bug reported: the kernels after 4.15.0-55-generic give this error in sys.log:
Sep 20 18:56:09 curt-desktop kernel: [ 1.783787] amdgpu 0000:01:00.0: Direct firmware load for amdgpu/polaris11_k_mc.bin failed with error -2 Sep 20 18:56:09 curt-desktop kernel: [ 1.783788] mc: Failed to load firmware "amdgpu/polaris11_k_mc.bin" Sep 20 18:56:09 curt-desktop kernel: [ 1.783843] [drm:gmc_v8_0_sw_init [amdgpu]] *ERROR* Failed to load mc firmware! Sep 20 18:56:09 curt-desktop kernel: [ 1.783883] [drm:amdgpu_device_init [amdgpu]] *ERROR* sw_init of IP block <gmc_v8_0> failed -2 Sep 20 18:56:09 curt-desktop kernel: [ 1.783885] amdgpu 0000:01:00.0: amdgpu_init failed Sep 20 18:56:09 curt-desktop kernel: [ 1.783887] amdgpu 0000:01:00.0: Fatal error during GPU init Sep 20 18:56:09 curt-desktop kernel: [ 1.783888] [drm] amdgpu: finishing device. Sep 20 18:56:09 curt-desktop kernel: [ 1.783889] [TTM] Memory type 2 has not been initialized Sep 20 18:56:09 curt-desktop kernel: [ 1.784033] amdgpu: probe of 0000:01:00.0 failed with error -2 so amdgpu isn't working after that kernel, thus it uses VESA for video. So I have no dual monitors any more. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.15.0-64-generic 4.15.0-64.73~16.04.1 ProcVersionSignature: Ubuntu 4.15.0-64.73~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-64-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.19 Architecture: amd64 CurrentDesktop: Unity Date: Fri Sep 20 20:47:30 2019 InstallationDate: Installed on 2018-09-01 (385 days ago) InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 (20180731) SourcePackage: linux-signed-hwe UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-signed-hwe (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1844847 Title: System isn't using amdgpu so its defaulting to vesa driver. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1844847/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs