915GM Datasheet, PDF (20/48 Pages) Intel Corporation – 915GM/PM/GME/GMS and 910GML/GMLE Express Chipset

Errata
16.
Display becomes a Solid Color with Intel® Smart 2D Display
Technology (Intel® S2DDT) Enabled
Problem:
If Memory Self-Refresh during C3 (C3SR) occurs when the Intel Smart 2D Display
Technology (Intel S2DDT) recompresses at the start of a frame, the graphics engine
may use the uncompressed frame instead of the recompressed frame. The issue may
occurs if the system is left idle (>20 minutes) with Intel S2DDT.
Implication: Display becomes a solid color or may cause a system hang.
Workaround: None
Status:
For the steppings affected, see the Summary Tables of Changes.
17.
PCI Express Scrambling
Problem:
While entering the Recovery state, 915PM/GM/GME PCI Express discrete graphics port
stops scrambling two symbols before the first TS (training sequence).
Implication: When these non-scrambled symbols are received by the endpoint, the de-scrambler of
the endpoint will observe two symbols of random data. The first symbol of TS1 will
reset the endpoint’s de-scrambler so that the endpoint should recognize the TS1 and
TS2 ordered-sets being transmitted and move into the Recovery state as planned.
There is no system level impact if the endpoint is PCI Express Specification 1.0a
compliant in ignoring the random data.
Workaround: None
Problem: For the steppings affected, see the Summary Tables of Changes.
18.
Macrovision Failure for 480p / 576p Modes
Problem:
GMCH does not encode Macrovision (content protection) properly for 480p and 578p
progressive modes and does not meet the Macrovision specification for these modes.
480p and 576p progressive modes will not pass MacroVision certification.
Implication: No DVD playback supported/available for these modes, other progressive scan modes
are not affected.
Workaround: None
Status:
For the steppings affected, see the Summary Tables of Changes.
20
Specification Update