** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.11 (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Plucky)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.11 (Ubuntu Plucky)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Noble)
Status: New => Invalid
** Changed in: linux (Ubuntu Plucky)
Status: New => In Progress
** Changed in: linux (Ubuntu Plucky)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Status: New => In Progress
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem-6.11 (Ubuntu Plucky)
Status: New => Invalid
** Description changed:
- Random crashes have been reported on GPUs that use DML2 (Ryzen AI APUs
- and Radeon 9000 dGPU). The crashes are root caused to corruption in
- registers used for floating point code.
+ [Impact]
+ Random crashes have been reported on GPUs that use DML2 (Ryzen AI APUs and
Radeon 9000 dGPU). The crashes are root caused to corruption in registers used
for floating point code.
- They are caused by a lack of FP context protection around that code.
- They are fixed by these 3 commits:
+ [Fix]
+ They are caused by a lack of FP context protection around that code. They are
fixed by these 3 commits:
https://github.com/torvalds/linux/commit/afcdf51d97cd58dd7a2e0aa8acbaea5108fa6826
https://github.com/torvalds/linux/commit/366e77cd4923c3aa45341e15dcaf3377af9b042f
https://github.com/torvalds/linux/commit/4408b59eeacfea777aae397177f49748cadde5ce
+
+ [Test]
+ 1. Install ubuntu with 6.11 kernel on AMD platform
+ 2. Run reboot test around 300 times
+ 3. The system should not hang while booting up
+
+ [Where problems could occur]
+ The 3 commits are straightforward for the protection, and didn't involve any
functional changes.
** Tags added: jira-stella-1107 oem-priority stella
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
** Changed in: linux-oem-6.11 (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/2106923
Title:
Fix divide by zero errors in DML2
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