Bug 60541
| Summary: | 'Timed out waiting for forcewake old ack to clear' and hangup on IvyBridge system | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Guenter Roeck (linux) |
| Component: | Video(DRI - Intel) | Assignee: | intel-gfx-bugs (intel-gfx-bugs) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | daniel, intel-gfx-bugs, kevlevrone6, kinzaghinicholas |
| Priority: | P1 | ||
| Hardware: | x86-64 | ||
| OS: | Linux | ||
| Kernel Version: | 3.8+ | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
Partial revert merged to -fixes, with cc: stable added. commit c11e5f35ab490bd30591563816fbc83526521777 Author: Guenter Roeck <linux@roeck-us.net> Date: Tue Jul 9 16:00:31 2013 -0700 Partially revert "drm/i915: unconditionally use mt forcewake on hsw/ivb" |
On Supermicro C7H61, BIOS version 2.00 dated 11/02/2012 or 2.0b dated 03/29/2013, with i7-3770K CPU, the following error message is seen repeatedly: Timed out waiting for forcewake old ack to clear On a heavily loaded system, this can result in a hangup within a few minutes. Reverting commit 36ec8f877 (drm/i915: unconditionally use mt forcewake on hsw/ivb) fixes the problem.