Bug 14575 - using a hdmi connector frame buffer resolution maxes out at 1920x1200
Summary: using a hdmi connector frame buffer resolution maxes out at 1920x1200
Status: CLOSED DOCUMENTED
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-dri
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-11-10 05:54 UTC by Wil Reichert
Modified: 2012-06-14 16:55 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.32-rc6
Subsystem:
Regression: No
Bisected commit-id:

Attachments
dmesg with hdmi connected (56.01 KB, text/plain)
2009-11-10 05:54 UTC, Wil Reichert 		Details
dmesg with dvi connector attached (55.99 KB, text/plain)
2009-11-10 05:55 UTC, Wil Reichert 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Wil Reichert 2009-11-10 05:54:37 UTC 
Created attachment 23720 [details]
dmesg with hdmi connected

Using a Radeon 4890 / Dell 3008WFP, a day or 2 old git kernel & kms built into
the kernel.  Using a DVI connector the kernel boots into the native panel resolution of 2560x1600, when using the hdmi connection it defaults to 1920x1200.  Even after booting into X I was unable to set the native resolution.  dmesg attached.
Comment 1 Wil Reichert 2009-11-10 05:55:14 UTC 
Created attachment 23721 [details]
dmesg with dvi connector attached
Comment 2 Alex Deucher 2009-11-10 17:42:59 UTC 
HDMI-A only supports single link tmds (max pixel clock of 165 Mhz).  2560x1600 requires dual link tmds which is only available over DVI in your case.
Comment 3 Wil Reichert 2009-11-10 18:46:37 UTC 
Doh, should have read the spec sheet better.  Thanks.
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