Hello,
I have since I upgraded to 4.2 (+ Xorg74 + graphics-..3.0.3.tcz + firmware.tcz) with a mga400 grafic card, following errors "freeing invalid memtype" are in dmesg (xorg log file is attached):
...
[   36.577838] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[   36.577853] [drm] No driver support for vblank timestamp query.
[   36.577870] [drm] Initialized mga 3.2.1 20051102 for 0000:01:00.0 on minor 0
[   36.583986] agpgart-via 0000:00:00.0: AGP 1.0 bridge
[   36.584042] agpgart-via 0000:00:00.0: putting AGP V2 device into 2x mode
[   36.584110] pci 0000:01:00.0: putting AGP V2 device into 2x mode
[   39.628172] Xorg:1919 freeing invalid memtype d8108000-d8118000
[   39.628235] Xorg:1919 freeing invalid memtype d8118000-d8128000
...
[   39.738316] Xorg:1919 freeing invalid memtype d88e8000-d88f8000
[   39.738364] Xorg:1919 freeing invalid memtype d88f8000-d8908000
[   39.893864] agpgart-via 0000:00:00.0: AGP 1.0 bridge
[   39.893920] agpgart-via 0000:00:00.0: putting AGP V2 device into 2x mode
[   39.893988] pci 0000:01:00.0: putting AGP V2 device into 2x mode
Im not sure this is a real issue. Simply a bit enoying to see such errors.
Is there any possibility how to stop this?
Update: the boot code "nopat" had to be used. Everything ok now. Error messages are gone.