Bug 92311
| Summary: | vga corruption on SM 750 GPU | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Dave Airlie (airlied) |
| Component: | Video(Other) | Assignee: | drivers_video-other |
| Status: | NEEDINFO --- | ||
| Severity: | normal | CC: | alan |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 3.19 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | image showing corruption | ||
Is it the 64bit wide writes or reads that do the damage. Is the framebuffer memory marked write combining at the bridge ? |
Created attachment 165221 [details] image showing corruption Due to a hw bug in ths GPU 64-bit writes to the VGA seem to corrupt things. Originally reported in RH bugzilla against RHEL6 vs RHEL5 behaviour on 32 vs 64-bit systems. Steps to Reproduce: 1.modify the runlevel to 3, to use vga mode. 2.use vim to edit some file, and scroll up 3.the vga display messy code