** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Also affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem (Ubuntu)
Status: New => Invalid
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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:
Invalid
Status in linux-oem package in Ubuntu:
Invalid
Status in linux source package in Bionic:
In Progress
Status in linux-oem source package in Bionic:
New
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.
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