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From: poma <pomidorabelisima-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: richter-Jqd5/X81recL63KmMnjC+CEWGD4kr0XT@public.gmane.org,
	nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: Re: Activate DVI-I behind KVM on FX 5200
Date: Wed, 6 Jan 2016 15:33:57 +0100	[thread overview]
Message-ID: <568D25D5.3030201@gmail.com> (raw)
In-Reply-To: <568B339D.2090102-Jqd5/X81recL63KmMnjC+CEWGD4kr0XT@public.gmane.org>

On 05.01.2016 04:08, Thomas Richter wrote:
> Hi folks,
> 
> I don't seem to be able to enable the DVI-I output of an old FX 5200
> behind a KVM switch. Autodetection works fine if the FX 5200 DVI output
> is switched to the monitor, but when it is not, I have not found a way
> to force-enable it.
> 
> Here is what I tried:
> 
> *) used the video=DVI-I-1:1280x1024-24@60e kernel parameter
> (framebuffer still sits at 1024x768)
> 
...

Tested here,

in "video=DVI-I-1:1280x1024-24@60e" directive
problematic are:

color depth (bpp) 24
-and-
'e' as "forced display enablement"

causing display -switching off- at the exact moment:
fb: switching to nouveaufb from VESA VGA


Contrairement à ce que,
these 3 examples have been successfully tested:

1.  video=DVI-I-1:1280x1024
2.  video=DVI-I-1:1280x1024@60
3.  video=DVI-I-1:1280x1024-16@60

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# cat /proc/cmdline
... video=DVI-I-1:1280x1024 ...


# fbset -i

mode "1280x1024"
    geometry 1280 1024 1280 1024 32
    timings 0 0 0 0 0 0 0
    accel true
    rgba 8/16,8/8,8/0,0/0
endmode

Frame buffer device information:
    Name        : nouveaufb
    Address     : 0xd0006000
    Size        : 5242880
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 5120
    Accelerator : No


# dmesg -t | egrep fb:\ 0x
nouveau 0000:02:00.0: DRM: allocated 1280x1024 fb: 0x50000, bo ffff88007f5d2800

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# cat /proc/cmdline
... video=DVI-I-1:1280x1024@60 ...


# fbset -i

mode "1280x1024"
    geometry 1280 1024 1280 1024 32
    timings 0 0 0 0 0 0 0
    accel true
    rgba 8/16,8/8,8/0,0/0
endmode

Frame buffer device information:
    Name        : nouveaufb
    Address     : 0xd0006000
    Size        : 5242880
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 5120
    Accelerator : No

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# cat /proc/cmdline
... video=DVI-I-1:1280x1024-16@60 ...


# fbset -i

mode "1280x1024"
    geometry 1280 1024 1280 1024 16
    timings 0 0 0 0 0 0 0
    accel true
    rgba 5/11,6/5,5/0,0/0
endmode

Frame buffer device information:
    Name        : nouveaufb
    Address     : 0xd0006000
    Size        : 2621440
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 2560
    Accelerator : No



Ref.
https://www.kernel.org/doc/Documentation/fb/modedb.txt

p.s.
Can you paste here the output of these two oneliners:
$ cd /sys/class/drm ; ls -1d card0-* | sed s/card0-// | sort
$ xrandr | grep connected | awk '{print $1}' | sort


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      parent reply	other threads:[~2016-01-06 14:33 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-05  3:08 Activate DVI-I behind KVM on FX 5200 Thomas Richter
     [not found] ` <568B339D.2090102-Jqd5/X81recL63KmMnjC+CEWGD4kr0XT@public.gmane.org>
2016-01-05 10:41   ` poma
     [not found]     ` <568B9DCE.8080407-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-01-05 13:47       ` Thomas Richter
     [not found]         ` <568BC959.3070109-Jqd5/X81recL63KmMnjC+CEWGD4kr0XT@public.gmane.org>
2016-01-05 18:43           ` poma
     [not found]             ` <568C0EE4.50307-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-01-05 19:31               ` Thomas Richter
     [not found]                 ` <568C1A26.7010004-otB+qtk3XKcL63KmMnjC+CEWGD4kr0XT@public.gmane.org>
2016-01-06  4:37                   ` poma
2016-01-06 14:33   ` poma [this message]

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