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Maniphest T73425

Frame rate halves after alt-tabbing to Windows and back when in Eyefinity triple-head mode.
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Description

When running in triple-head 5760x1080 full-screen mode, then alt-tabbing to the Windows desktop and back into Arma, the frame rate drops significantly (half, in my case). The only way to get the frame rate back up is to restart Arma.

I tested in single-monitor mode, and the frame rate remains constant in this case - it only seems to be when in triple-head mode that the frame rate drops.

Details

Legacy ID
188388853
Severity
None
Resolution
No Bug
Reproducibility
Always
Category
Performance
Steps To Reproduce
  1. Set video card to 5760x1080 eyefinity mode
  2. Start Arma, set resolution to 5760x1080, full-screen.
  3. Enter editor, place man on a map, preview
  4. Go to video settings - observe frame rate (I was getting ~64fps at this point)
  5. Alt-tab back to the Windows desktop
  6. Switch back to Arma. Observe that the frame rate is now much lower (33fps, in my case).
Additional Information

AMD 7990 graphics card
Catalyst 13.8 driver
16GB RAM
Intel i7 4770K CPU

Event Timeline

davedontmind edited Steps To Reproduce. (Show Details)Sep 29 2013, 10:46 AM
davedontmind edited Additional Information. (Show Details)
davedontmind set Category to Performance.
davedontmind set Reproducibility to Always.
davedontmind set Severity to None.
davedontmind set Resolution to No Bug.
davedontmind set Legacy ID to 188388853.May 7 2016, 4:59 PM
davedontmind added a subscriber: davedontmind.
davedontmind added a comment.Oct 1 2013, 8:24 PM

I disovered the cause of the slowdown to be a 3rd-party program, f.lux.
Stopping f.lux caused the arma frame rates to be normal again.

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