5.13.0-6006 (lp1920674-debug-3) with "blacklist=amdgpu modprobe.blacklist=amdgpu" then modprobe amdgpu from ssh
a) black screen but system keeps running b) "Segmentation fault" in the ssh console c) dmesg attached Thank you! ** Attachment added: "dmesg_5.13.0-6006_ModprobeAmdgpu.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1920674/+attachment/5509954/+files/dmesg_5.13.0-6006_ModprobeAmdgpu.txt -- 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/1920674 Title: AMD A8-7680 (amdgpu): broken Xorg acceleration and hibernation Status in linux package in Ubuntu: Incomplete Bug description: Dear developers, please let me thank you for all your hard work first of all, I'm a big fan of yours! On my desktop PC with AMD A8-7680 APU, I'm facing 2 problems which seem to be connected to the amdgpu kernel module: 1. Amdgpu kernel module loads correctly during boot, but VESA Xorg module is loaded instead of AMDGPU Xorg module during X startup. This results in non-accelerated X and high CPU load. - This situation is always reproducible. - I'm experiencing it with all kernel versions in between 5.4.0-47-generic and 5.4.0-67-generic inclusive. - The situation escalates more with newer kernel version. For 5.8.0-45-generic and 5.11.8-051108-generic, X even does not start and I just get black screen. - I have found a workaround after many days of googling and testing. AMDGPU Xorg module is loaded correctly if and only if I disable AMD ACP by means of the following kernel boot parameter: amdgpu.ip_block_mask=0xfffffdff - Acceleration is ok with kernels where AMD ACP is disabled by default (linux-image-linuxlite-5.6.0 for example) 2. The 2nd problem I'm facing is with non functioning hibernation after I "fixed" the X acceleration. Hibernation image does not seem to get created, screen goes black, PC freezes but never turns off whenever AMDGPU Xorg module is loaded. Hibernation and subsequent resume is all ok if I disable AMDGPU by means of "nomodeset" and go just with VESA module. - always reproducible but tested only with 5.4.0-67-generic Thank you and best regards, Radek ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-67-generic 5.4.0-67.75 ProcVersionSignature: Ubuntu 5.4.0-67.75-generic 5.4.94 Uname: Linux 5.4.0-67-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: radek 1513 F.... pulseaudio /dev/snd/controlC0: radek 1513 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: XFCE Date: Sun Mar 21 15:22:29 2021 HibernationDevice: RESUME=/dev/disk/by-label/SSD_LinuxSwap IwConfig: lo no wireless extensions. eth0 no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-67-generic root=UUID=1cc747ae-f2db-4733-aa04-be8d4bde050a ro ipv6.disable=1 net.ifnames=0 nmi_watchdog=0 resume=LABEL=SSD_LinuxSwap amdgpu.ip_block_mask=0xfffffdff no_console_suspend RelatedPackageVersions: linux-restricted-modules-5.4.0-67-generic N/A linux-backports-modules-5.4.0-67-generic N/A linux-firmware 1.187.10 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/13/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P5.20 dmi.board.name: FM2A68M-HD+ dmi.board.vendor: ASRock dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To be filled by O.E.M. dmi.chassis.version: To be filled by O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP5.20:bd02/13/2019:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A68M-HD+:rvr:cvnTobefilledbyO.E.M.:ct3:cvrTobefilledbyO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1920674/+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
