This bug was fixed in the package linux - 4.18.0-10.11
---------------
linux (4.18.0-10.11) cosmic; urgency=medium
* linux: 4.18.0-10.11 -proposed tracker (LP: #1797379)
* the machine of lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca,
1002:15dd) often hangs randomly (LP: #1796789)
- drm/amd: Add missing fields in atom_integrated_system_info_v1_11
* Miscellaneous Ubuntu changes
- [Config] CONFIG_VBOXGUEST=n
- ubuntu: vbox -- update to 5.2.18-dfsg-2
- ubuntu: enable vbox build
-- Seth Forshee <seth.fors...@canonical.com> Thu, 11 Oct 2018 08:24:45
-0500
** Changed in: linux (Ubuntu)
Status: Incomplete => Fix Released
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https://bugs.launchpad.net/bugs/1796789
Title:
the machine of lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev
ca, 1002:15dd) often hangs randomly
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem package in Ubuntu:
New
Status in linux source package in Bionic:
New
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 system will hang randomlly, sometimes it hangs during
boot, reboot or poweroff, sometimes it hangs with longtime standby.
[Fix]
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.
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