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Registering twice an nv_backlight interface if the G96 is the main card
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Description

Hardware:

  • MCP79 - 9400M
  • G96 - 9600M GT (main card, driving the screen)

After setting the G96 to be the main card, on a previous boot, G96's register 0x61c084 will be equal to 0x400 whereas it usually was equal to 0x0, thus leading to a double registration -MCP79's register 0x61c084 is always equal to 0x0.

The NVidia driver always forces POST, which sets G96's 0x61c084 back to 0x0. Setting config=NvForcePost=1 will effectively solve the issue.

See fdo#86539.

Event Timeline

pmoreau raised the priority of this task from to Needs Triage.
pmoreau updated the task description. (Show Details)
pmoreau added a project: Nouveau.
pmoreau added a subscriber: pmoreau.
pmoreau triaged this task as Wishlist priority.Jan 14 2015, 12:36 AM
pmoreau changed the visibility from "All Users" to "Public (No Login Required)".Jan 14 2015, 12:41 AM
pmoreau renamed this task from [MCP79, G96] Registering twice an nv_backlight interface if the G96 is the main card to Registering twice an nv_backlight interface if the G96 is the main card.Jan 15 2015, 11:53 PM
pmoreau added projects: G96, MCP79/7A.
pmoreau moved this task from Backlog to Doing on the Linux board.