** 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 Kernel Packages, which is subscribed to linux in 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) Status in HWE Next: New Status in linux package in Ubuntu: Incomplete Bug description: [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. [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. [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. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1796786/+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
