[SRU][Cosmic/Bionic/OEM-B][PATCH 0/1] The machine of lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca, 1002:15dd) often hangs randomly

Hui Wang hui.wang at canonical.com
Tue Oct 9 05:22:15 UTC 2018

BugLink: https://bugs.launchpad.net/bugs/1796789

On the machine of Lenovo M715, there is an AMD GPU (1022:15dd rev ca), when it
switchs to amdgpufb, the system will hang randomlly, sometimes it hangs during
boot, reboot or poweroff, sometimes it hangs with longtime standby.

Through bisecting, I found this patch can fix the problem, looks like without
this patch the ATOM BIOS can't be parsed correctlly.

[Test Case]
Did the test of "boot, reboot and poweroff" 5 times, worked very well.
Let the system standby over one night, worked very well.

[Regression Potential]
Very low, I tested this patch on at least 6 differnt lenovo machines
and those machines have different AMD GPUs on them, all of them worked
as well as before.

Harry Wentland (1):
  drm/amd: Add missing fields in atom_integrated_system_info_v1_11

 drivers/gpu/drm/amd/include/atomfirmware.h | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)


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