| Bug ID | 91197 |
|---|---|
| Summary | Radeon Trinity 7400G fails with 4K UHD screen - atombios stuck exeuting BF64 |
| Product | DRI |
| Version | unspecified |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/Radeon |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | dennis.jansen@web.de |
I have several issues trying to connect a 4k display to the radeon card via HDMI (@30Hz). If I boot with the screen connected, when trying to take over modesetting from EFI, the internal notebook display goes black as well as the external. When I try to attach it during runtime, I can see the 3840 mode, but when I tryt to select it I get [ 97.667521] [drm:atom_op_jump [radeon]] *ERROR* atombios stuck in loop for more than 5secs aborting [ 97.667549] [drm:atom_execute_table_locked [radeon]] *ERROR* atombios stuck executing BF64 (len 962, WS 0, PS 0) @ 0xC1A1 Switching back to 1920 works fine, trying again simply causes the same error again. Tested Linux kernels 4.1.0 and 3.19. Ubuntu 15.04. I might not be able to test for long, will probably send the screen back before long if I can't get it working in full resolution at all.
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