hello Jonathan.
On Mon, Jun 15, 2026 at 02:09:13PM +1000, Jonathan Gray wrote: > On Sun, Jun 14, 2026 at 09:52:53PM +0300, Petre Rodan wrote: > > 9:0:0: ATI Navi 21 > > 0x0000: Vendor ID: 1002, Product ID: 73bf > > 0x0004: Command: 0006, Status: 0010 > > 0x0008: Class: 03 Display, Subclass: 00 VGA, > > Interface: 00, Revision: c3 > > 0x000c: BIST: 00, Header Type: 80, Latency Timer: 00, > > Cache Line Size: 10 > > 0x0010: BAR mem prefetchable 64bit addr: 0x0000007800000000/0x400000000 > > 0x0018: BAR mem prefetchable 64bit addr: 0x0000007c00000000/0x10000000 > > 0x0020: BAR io addr: 0x0000e000/0x0100 > > 0x0024: BAR mem 32bit addr: 0xfca00000/0x00100000 > > framebuffer memory is described by pci bar 0x10 > > the window size here is already 16GB, even without resizing the bar > > can you try this diff to force visible vram to 512MB? > > Index: sys/dev/pci/drm/amd/amdgpu/amdgpu_gmc.c > =================================================================== > RCS file: /cvs/src/sys/dev/pci/drm/amd/amdgpu/amdgpu_gmc.c,v > diff -u -p -r1.20 amdgpu_gmc.c > --- sys/dev/pci/drm/amd/amdgpu/amdgpu_gmc.c 25 May 2026 08:56:32 -0000 > 1.20 > +++ sys/dev/pci/drm/amd/amdgpu/amdgpu_gmc.c 15 Jun 2026 03:53:34 -0000 > @@ -216,6 +216,8 @@ void amdgpu_gmc_vram_location(struct amd > uint64_t vis_limit = (uint64_t)amdgpu_vis_vram_limit << 20; > uint64_t limit = (uint64_t)amdgpu_vram_limit << 20; > > + vis_limit = 512ULL << 20; > + > mc->vram_start = base; > mc->vram_end = mc->vram_start + mc->mc_vram_size - 1; > if (limit < mc->real_vram_size) great news, with this patch all errors from dmesg went away and got replaced with amdgpu0: SIENNA_CICHLID GC 10.3.0 60 CU rev 0x01 amdgpu0: 1920x1080, 32bpp Xorg loaded the modesetting driver, so xrandr can see both monitors and all resolutions. if you wish I can try other patches as well if you want to have a cleaned-up implementation for inclusion in the kernel code. best regards, peter
