Bug 15222

Summary:	booting i915.modeset=1 prints output to wrong display
Product:	Drivers	Reporter:	Dmitrij D. Czarkoff (czarkoff)
Component:	Video(DRI - Intel)	Assignee:	drivers_video-dri-intel (drivers_video-dri-intel)
Status:	RESOLVED INVALID
Severity:	normal	CC:	akpm, jbarnes, rjw
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.32	Subsystem:
Regression:	No	Bisected commit-id:

Description Dmitrij D. Czarkoff 2010-02-04 07:55:32 UTC

On my ASUS R2H when KMS enabled I get no output not from framebuffer on system startup, nor from X. With i915.modeset=0 output is present.

I don't have an external monitor so I can't check it, but from my previous experience this kind of bugs come from driver pushing output to VGA-out instead of internal screen.

Is there any option to switch the output?

Comment 1 Andrew Morton 2010-02-04 18:47:18 UTC

Can you narrow down the regression window for us please?  Was 2.6.31 OK?

Comment 2 Rafael J. Wysocki 2010-02-04 19:37:36 UTC

Assuming it wasn't.

Comment 3 Rafael J. Wysocki 2010-02-04 19:51:42 UTC

I should have said "assuming it was", sorry.

Comment 4 Dmitrij D. Czarkoff 2010-02-04 20:55:26 UTC

It never worked with KMS, and it works fine with any kernel version when modesetting is managed by xf86-video-intel.

Comment 5 Rafael J. Wysocki 2010-02-04 21:05:42 UTC

Not a regression, then.

Comment 6 Dmitrij D. Czarkoff 2010-02-05 12:14:20 UTC

Sorry for calling it a regression, but is there any way to change the output for KMS-guided FB and X11?

Comment 7 Jesse Barnes 2010-02-19 20:51:29 UTC

Make sure you have CONFIG_FRAMEBUFFER_CONSOLE=y or you won't get any console output.  Also, you need to have recent X drivers for KMS to work (at least xf86-video-intel 2.7 but preferably 2.10).

Comment 8 Dmitrij D. Czarkoff 2010-02-20 14:54:00 UTC

Running Arch Linux with default kernel and default X11 drivers. Works fine on several other laptops...

$ pacman -Qs xf86-video-intel
local/xf86-video-intel 2.10.0-1 (xorg-video-drivers)
    X.org Intel i810/i830/i915/945G/G965+ video drivers
$ zgrep CONFIG_FRAMEBUFFER_CONSOLE /proc/config.gz 
CONFIG_FRAMEBUFFER_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y

Comment 9 Dmitrij D. Czarkoff 2010-02-24 21:40:08 UTC

Tested with external monitor. Still no modes.
What can I do to actually have X (as intel X driver nowdays doesn't support UMS).

Comment 10 Jesse Barnes 2010-02-26 22:50:36 UTC

Can you load your drm driver with 'debug=1' then load i915 and attach the dmesg output to this bug?  Sounds like we're not finding your output correctly.

Comment 11 Jesse Barnes 2010-07-23 19:53:53 UTC

timeout.