Problem persists in kernel 4.17-rc6 from http://kernel.ubuntu.com /~kernel-ppa/mainline/v4.17-rc6/
#uname -r 4.17.0-041700rc6-generic #cat /proc/cmdline BOOT_IMAGE=/vmlinuz-4.17.0-041700rc6-generic <redacted> amdgpu.cik_support=1 radeon.cik_support=0 amdgpu.dc=1 #ls /sys/class/drm card0 card0-eDP-1 card0-HDMI-A-1 renderD128 ttm version <<--***NOTE no VGA*** #dmesg | grep drm [ 2.326305] [drm] radeon kernel modesetting enabled. [ 2.327644] fb: switching to radeondrmfb from EFI VGA [ 2.372539] [drm] amdgpu kernel modesetting enabled. [ 2.380846] [drm] initializing kernel modesetting (KAVERI 0x1002:0x130A 0x17AA:0x3988 0x00). [ 2.380878] [drm] register mmio base: 0xF0B00000 [ 2.380880] [drm] register mmio size: 262144 [ 2.380889] [drm] add ip block number 0 <cik_common> [ 2.380892] [drm] add ip block number 1 <gmc_v7_0> [ 2.380894] [drm] add ip block number 2 <cik_ih> [ 2.380897] [drm] add ip block number 3 <kv_dpm> [ 2.380900] [drm] add ip block number 4 <dm> [ 2.380903] [drm] add ip block number 5 <gfx_v7_0> [ 2.380906] [drm] add ip block number 6 <cik_sdma> [ 2.380909] [drm] add ip block number 7 <uvd_v4_2> [ 2.380911] [drm] add ip block number 8 <vce_v2_0> [ 2.404721] [drm] BIOS signature incorrect 0 0 [ 2.404832] [drm] vm size is 64 GB, 2 levels, block size is 10-bit, fragment size is 9-bit [ 2.404855] [drm] Detected VRAM RAM=1024M, BAR=1024M [ 2.404858] [drm] RAM width 64bits UNKNOWN [ 2.405130] [drm] amdgpu: 1024M of VRAM memory ready [ 2.405133] [drm] amdgpu: 3072M of GTT memory ready. [ 2.405145] [drm] GART: num cpu pages 262144, num gpu pages 262144 [ 2.405180] [drm] PCIE GART of 1024M enabled (table at 0x000000F400040000). [ 2.405266] [drm] Internal thermal controller without fan control [ 2.405269] [drm] amdgpu: dpm initialized [ 2.406296] [drm] Found UVD firmware Version: 1.55 Family ID: 9 [ 2.406649] [drm] Found VCE firmware Version: 50.10 Binary ID: 2 [ 2.407995] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:3! type 0 expected 3 [ 2.408115] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:4! type 0 expected 3 [ 2.408204] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:5! type 0 expected 3 [ 2.408324] [drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from Adapter Service for connector index:6! type 0 expected 3 [ 2.420247] [drm] Display Core initialized with v3.1.38! [ 2.426796] [drm] SADs count is: -2, don't need to read it [ 2.427373] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 2.427379] [drm] Driver supports precise vblank timestamp query. [ 2.446239] [drm] UVD initialized successfully. [ 2.561743] [drm] VCE initialized successfully. [ 2.569100] [drm] fb mappable at 0xA042A000 [ 2.569106] [drm] vram apper at 0xA0000000 [ 2.569109] [drm] size 8294400 [ 2.569111] [drm] fb depth is 24 [ 2.569113] [drm] pitch is 7680 [ 2.569233] fbcon: amdgpudrmfb (fb0) is primary device [ 2.657000] amdgpu 0000:00:01.0: fb0: amdgpudrmfb frame buffer device [ 2.678478] [drm] Initialized amdgpu 3.25.0 20150101 for 0000:00:01.0 on minor 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761751 Title: Black screen on 18.04 + AMD RX460 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
