Re: gfxmode=auto. how is resolution calculated?

[Andrey Borzenkov]

В Tue, 19 Mar 2013 19:16:01 +0000
Carrot Cruncher <address@hidden> пишет:

> image of vbeinfo:
> http://postimage.org/image/6ehplch1x/
> 
> this was taken after i'd manually set the gfxmode to 1920x1080x32 so it
> would all fit on the screen.
> 

And which mode is selected by default?

> On Sat, Mar 16, 2013 at 9:49 AM, Carrot Cruncher
> <address@hidden>wrote:
> 
> > the laptop i have has a full hd screen. i'll get the vbeinfo info but for
> > now here is some further info :
> >
> > xrandr
> > Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
> > LVDS-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis)
> > 408mm x 230mm
> >    1920x1080      60.0*+   60.0
> >    1680x1050      60.0
> >    1400x1050      60.0
> >    1280x1024      59.9
> >    1280x960       59.9
> >    1152x864       60.0
> >    1024x768       59.9
> >    800x600        59.9
> >    640x480        59.4
> >    720x400        59.6
> >    640x400        60.0
> >    640x350        59.8
> > VGA-1 disconnected (normal left inverted right x axis y axis)
> > HDMI-1 disconnected (normal left inverted right x axis y axis)
> >
> > cat
> > /sys/devices/pci0000:00/0000:00:03.0/0000:01:00.0/drm/card0/card0-LVDS-1/edid
> > | edid-decode
> > Extracted contents:
> > header:          00 ff ff ff ff ff ff 00
> > serial number:   0d af 00 18 00 00 00 00 28 12
> > version:         01 03
> > basic params:    80 29 17 78 0a
> > chroma info:     cc b5 a7 54 45 97 26 16 50 54
> > established:     00 00 00
> > standard:        01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
> > descriptor 1:    29 36 80 a0 70 38 1f 40 30 20 35 00 98 e6 10 00 00 18
> > descriptor 2:    00 00 00 fe 00 4e 31 38 34 48 34 2d 4c 30 31 0a 20 20
> > descriptor 3:    00 00 00 fe 00 43 4d 4f 0a 20 20 20 20 20 20 20 20 20
> > descriptor 4:    00 00 00 fe 00 4e 31 38 34 48 34 2d 4c 30 31 0a 20 20
> > extensions:      00
> > checksum:        a0
> >
> > Manufacturer: CMO Model 1800 Serial Number 0
> > Made week 40 of 2008
> > EDID version: 1.3
> > Digital display
> > Maximum image size: 41 cm x 23 cm
> > Gamma: 2.20
> > Supported color formats: RGB 4:4:4, YCrCb 4:2:2
> > First detailed timing is preferred timing
> > Established timings supported:
> > Standard timings supported:
> > Detailed mode: Clock 138.650 MHz, 408 mm x 230 mm
> >                1920 1968 2000 2080 hborder 0
> >                1080 1083 1088 1111 vborder 0
> >                -hsync -vsync
> > ASCII string: N184H4-L01
> >   ASCII string: CMO
> >          ASCII string: N184H4-L01
> >   Checksum: 0xa0
> > EDID block does NOT conform to EDID 1.3!
> >     Missing name descriptor
> >     Missing monitor ranges
> >
> > this is a fedora 18 system with the following grub package installed :
> >
> > grub2-2.00-15.fc18.x86_64
> >
> >
> > On Fri, Mar 15, 2013 at 11:47 PM, Jordan Uggla <address@hidden>wrote:
> >
> >> On Fri, Mar 15, 2013 at 2:57 PM, Carrot Cruncher
> >> <address@hidden> wrote:
> >> > hi. can i ask how the resolution used is calculated when setting the
> >> gfxmode
> >> > setting to auto in grub2. i have a laptop where vbeinfo shows the
> >> highest
> >>
> >> In grub 2.00 I believe that what is used is the highest resolution
> >> supported by VBE (or GOP,UGA, or whatever interface is available) that
> >> is *also* supported by your monitor, as reported in the monitor's EDID
> >> information.
> >>
> >> > resolution as being 1920x1080x32 but this isn't what is being used.
> >> without
> >>
> >> Does your monitor support this resolution?
> >>
> >> > hardcoding the resolution, is there a way to configure grub2 to use the
> >> > highest resolution detected? thanks.
> >>
> >> Well clearly that is what should already happen when gfxmode=auto, so
> >> we need to figure out why that apparently isn't happening for you,
> >> then go from there.
> >>
> >> What version of grub are you using?
> >> Could you post the full output of "videoinfo" from the grub shell,
> >> either via a picture from a camera, serial log, or (if you're really
> >> ambitious) typing it out manually?
> >>
> >> --
> >> Jordan Uggla (Jordan_U on irc.freenode.net)
> >>
> >
> >