Bug 14862

Summary: intel-agp breaks X, regression from 2.6.31
Product: Drivers Reporter: Zephaniah E. Hull. (warp-spam_kernel)
Component: Video(AGP)Assignee: Dave Airlie (airlied)
Status: CLOSED DUPLICATE    
Severity: normal CC: rjw
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.32 Tree: Mainline
Regression: Yes
Bug Depends on:    
Bug Blocks: 14230    

Description Zephaniah E. Hull. 2009-12-22 22:59:47 UTC
This has been bisected down to commit 1755168, which reworked the PCI DMI API stuff for the Intel IOMMU support.

On 2.6.32 if I disable USE_PCI_DMA_API everything works again, with it enabled I get a mouse cursor but corrupted frame buffer.

This is an HP/Compaq 6710b with GM965 integrated video, on Ubuntu 9.10.

Without this fix 2.6.32 is unusable on this hardware.
(Console works, but.)

Zephaniah E. Hull.
Comment 1 Rafael J. Wysocki 2009-12-29 21:31:28 UTC

*** This bug has been marked as a duplicate of bug 14627 ***