** Summary changed: - screen displays normally on the lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca, 1002:15dd) + screen displays abnormally on the lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca, 1002:15dd)
** Description changed: - Steps: - 1. Installed system. - 2. Verify the screen in the P2 of installation. + [Impact] + On the machine of Lenovo M715, there is an AMD GPU (1022:15dd rev ca), when it + switchs to amdgpufb, the screen displays abnormally, we tested with a couple monitors, + all of them can reproduce this issue. - Actual result: - Screen displays abnormally, please refer to the picture in attachment. + [Fix] + Backported 3 patches from mainline kernel, all of them focus on the change of + disable_vga(). After applying these 3 patches, the issue disappears. - Expected result: - Display should be good in all stage. + + [Test Case] + boot the system, run glxgears, everything works well + + [Regression Potential] + Very low, these patches come from upstream, and I have tested them on at least 6 different + lenovo machines and those machines have different AMD GPUs on them, all of them worked + as well as before. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1796786 Title: screen displays abnormally on the lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca, 1002:15dd) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1796786/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
