Re: 640x480 only res available after f14 - f20 upgrade?

[Ahmad Samir <ahmadsamir3891@xxxxxxxxx>]

On 18 March 2014 00:16, Morgan Read <mstuff@xxxxxxxxxxx> wrote:

On 17/03/14 21:26, Bruno Wolff III wrote:
> On Mon, Mar 17, 2014 at 21:21:57 +0000,
>   Morgan Read <mstuff@xxxxxxxxxxx> wrote:
>>
>> I'd really appreciate anybody pointing me in the right direction(s) - I
>> suspect I've just not done something really straight forward as it seems
>> very strange that this old HP ProLiant ML 150 and equally old Dell
>> 1703FP monitor combo which worked fine under f14 now doesn't under f20.
>
> Does that monitor do EDID? If it doesn't or returns bogus information,
> that could be what is triggering the problem. In which case using an
> xorg.conf file to state the capabilities of your monitor might help.

Hi Bruno, thanks for coming back to me.  This is from the Xorg.log:
...

> [    22.238] (II) modesetting(0): Serial No: 2Y31741AD165
> [    22.238] (II) modesetting(0): Monitor name: DELL 1703FP
> [    22.238] (II) modesetting(0): Ranges: V min: 56 V max: 76 Hz, H min:
> 30 H max: 80 kHz, PixClock max 145 MHz
> [    22.238] (II) modesetting(0): EDID (in hex):
> [    22.238] (II) modesetting(0):     00ffffffffffff0010ac103035363144
> [    22.238] (II) modesetting(0):     020e01030e221b78ee8706a55c479c25
> [    22.239] (II) modesetting(0):     1e4f54a54b00714f8180010101010101
> [    22.239] (II) modesetting(0):     010101010101302a009851002a403070
> [    22.239] (II) modesetting(0):     1300520e1100001e000000ff00325933
> [    22.239] (II) modesetting(0):     3137343141443136350a000000fc0044
> [    22.239] (II) modesetting(0):     454c4c203137303346500a20000000fd
> [    22.239] (II) modesetting(0):     00384c1e500e000a202020202020001e
> [    22.239] (II) modesetting(0): Printing probed modes for output VGA-0
> [    22.239] (II) modesetting(0): Modeline "640x480"x75.0   31.50  640
> 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz e)
> [    22.239] (II) modesetting(0): Modeline "640x480"x60.0   25.20  640
> 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
> [    22.239] (II) modesetting(0): Modeline "720x400"x70.1   28.32  720
> 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz e)
> [    22.239] (II) modesetting(0): Output VGA-0 connected
> [    22.239] (II) modesetting(0): Using exact sizes for initial modes
> [    22.239] (II) modesetting(0): Output VGA-0 using initial mode
> 640x480 +0+0
> [    22.239] (II) modesetting(0): Using default gamma of (1.0, 1.0, 1.0)
> unless otherwise stated.
> [    22.239] (==) modesetting(0): DPI set to (96, 96)

...
That looks like it does do EDID?

I've done this to no effect in /etc/X11/xorg.conf.d :
> 40-monitor.conf
>
> Section "Monitor"
>   Identifier  "VGA1"
>   Option      "PreferredMode" "1280x1024"
> EndSection
>
> Restart your X system.
>
> If it doesn't work try creating the next two files in the same path, and restarting again:
>
> 30-graphic.conf
>
> Section "Device"
>     Identifier      "Intel Integrated"
>     Driver          "intel"
> EndSection
>

This machine doesn't have an intel chip, it's got a MGA G200E IIUC, c.f. http://pci-ids.ucw.cz/read/PC/102b/0522 (that matches the PCI info from X log you posted).

I am not an expert but looking at this patch http://pkgs.fedoraproject.org/cgit/xorg-x11-drv-mga.git/tree/mga-1.6.2-fix-kms-matching.patch?h=f20

it looks like the mgag200 kernel module is automatically used on your machine, check the output of 'lsmod'; and from the log indeed the modesetting X11 driver is auto-configured.

I wonder if disabling KMS (booting with nomodeset or modeset=0 on the kernel cmdline) would give better results (i.e. the system will use the mga driver); you could try that, see what happens.

 

> 50-screen.conf
>
> Section "Screen"
>     Identifier      "Default Screen"
>     DefaultDepth  24
>     SubSection "Display"
>             Depth          24
>             Modes         "1280x1024"  "1024x768"   "640x480"
>     EndSubSection
> EndSection

But, without any effect?

What's so frustrating is that this used to work...

Thanks,

M.
--
Morgan Read
NEW ZEALAND
<mailto:mstuffATreadDOTorgDOTnz>

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--
Ahmad Samir

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