[Bug 2141377] Re: [SRU]Fix xe GPU suspend/resume crash on Battlemage

6.17.0-1013-oem #13-Ubuntu

suspend for 300 times, all good.


04:00.0 VGA compatible controller [0300]: Intel Corporation Device [8086:e212]

Mar 02 16:39:28 P3-Ultra-G2-Ref2-S1 kernel: xe 0000:04:00.0: [drm] Found
battlemage (device ID e212) discrete display version 14.01 stepping B0

journalctl -k |grep "suspend entry" |wc -l
300


** Tags removed: verification-needed-noble-linux-oem-6.17
** Tags added: verification-done-noble-linux-oem-6.17

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/2141377

Title:
[SRU]Fix xe GPU suspend/resume crash on Battlemage

Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-6.17 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Won't Fix
Status in linux-oem-6.17 source package in Noble:
Fix Committed
Status in linux source package in Questing:
In Progress
Status in linux-oem-6.17 source package in Questing:
Invalid
Status in linux source package in Resolute:
Fix Released
Status in linux-oem-6.17 source package in Resolute:
Invalid

Bug description:
[ Impact ]
Intel Battlemage xe GPU (8086:e212) crashes during system resume with
NULL pointer dereference in xe_guc_ads_populate_post_load(), making
suspend/resume non-functional on affected systems.

Root cause: Noble 6.17 kernels have commit 59cebf0bdff48 but are missing
its prerequisite commit 1313351e71181. Without proper forcewake handling,
MMIO register access causes hardware corruption.

[ Fix ]
Cherry-pick upstream commit from v6.18-rc1:
- 1313351e71181 ("drm/xe: make xe_gt_idle_disable_c6() handle the forcewake internally")

[ Test Plan ]
1. System: Lenovo ThinkStation P3 Ultra G2 with Battlemage dGPU (8086:e212)
2. Reproduce: rtcwake -m mem -s 10
3. Verify: System resumes successfully without crashes

[ Where problems could occur ]
It may break xe driver GT idle/power management, affects suspend/resume path. Commit is from mainline v6.18-rc1.

The dGPU is not fully certified on v6.8 kernel, so SRU for questing
and oem-6.17.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/2141377/+subscriptions