Re: Regression: black screen with Radeon KMS in 2.6.38 (2.6.37.4 worked fine)

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On Mon, Mar 21, 2011 at 3:40 PM, John Lindgren <john.lindgren@xxxxxxx> wrote:
> Hi,
>
> I want to report a bug in the Linux kernel 2.6.38.  Loading the radeon
> module causes the console to go completely blank (laptop backlight on, but
> nothing displayed).  The system still responds to ctrl-alt-del and reboots.
>  This is a regression from the previous kernel, 2.6.37.4, where kernel mode
> setting works flawlessly.
>
> With radeon.modeset=0, or with the module blacklisted, the system boots
> fine, and I can use X, but without the powersaving features available
> through KMS.

Please post to dri-devel list, but my first guess is missing fbcon or
something like that.

can't tell without complete dmesg.

Alternative file a bug on kernel bugzilla, with the complete dmesg attached.

Dave.
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