[coreboot] Intel G41 - Asrock G41M-GS: no coreboot screen output from Intel GPU on VGA

[Jose Trujillo]

Just press ESC key during booting for Seabios and if everything in the video interface is properly configured by default you should see the boot menu.


‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On August 14, 2018 4:35 PM, <h42 at memeware.net> wrote:

> I wrote the way i had build coreboot. Tianocore is not the default
> payload. The default payload recently is (i checked now) SeaBIOS 1.11.2
> .
> I have not touched anything at the payload. I just leave everything
> default and would like to be able to see the output of coreboot so that
> i can choose for example to boot from a usb-pendrive.
>
> What should i do now to get the <everything at default coreboot> to show
> output on the screen?
>
> On 2018-08-14 11:53, Jose Trujillo via coreboot wrote:
>
> > Hello h42
> > If you are using Tianocore you must use VESA framebuffer
> > If Seabios use text mode
> > Jose
> > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > On August 14, 2018 2:41 PM, h42 at memeware.net wrote:
> >
> > > I dont get anything on the screen from coreboot. The later os is
> > > displaying fine.
> > > How i build the image: ran on a fresh git cloned (from today) 'make
> > > menuconfig', chose just the mainboard manufacturer and the model,
> > > press
> > > esc, confirmed saving, ran 'make'. I installed this image and dont get
> > > any coreboot output on the screen. When i wait long enough, i get the
> > > output from the Linux OS on the screen.
> > > From the coreboot logfile:
> > > coreboot-4.8-1195-gb75a08b199
> > > [...]
> > > FMAP: Found "FLASH" version 1.1 at 0.
> > > FMAP: base = fff00000 size = 100000 #areas = 4
> > > FMAP: area RW_MRC_CACHE found @ 10000 (65536 bytes)
> > > MRC: No data in cbmem for 'RW_MRC_CACHE'.
> > > BS: BS_DEV_ENUMERATE times (us): entry 0 run 150329 exit 16016
> > > found VGA at PCI: 00:02.0
> > > Setting up VGA for PCI: 00:02.0
> > > Setting PCI_BRIDGE_CTL_VGA for bridge DOMAIN: 0000
> > > Setting PCI_BRIDGE_CTL_VGA for bridge Root Device
> > > Allocating resources...
> > > Reading resources...
> > > TOUUD 0x80000000 TOLUD 0x80000000 TOM 0x80000000
> > > IGD decoded, subtracting 64M UMA and 4M GTT
> > > TSEG decoded, subtracting 8M
> > > Available memory below 4GB: 1972M
> > > Adding UMA memory area base=0x7b400000 size=0x04c00000
> > > Adding PCIe config bar base=0xe0000000 size=0x10000000
> > > Done reading resources.
> > > [...]
> > > [21.707417] CONFIG =>
> > > [21.709411] (Primary =>
> > > [21.711924] (Port => Analog ,
> > > [21.715130] Framebuffer =>
> > > [21.718076] (Width => 640,
> > > [21.721542] Height => 400,
> > > [21.725008] Start_X => 0,
> > > [21.728301] Start_Y => 0,
> > > [21.731594] Stride => 1,
> > > [21.734886] V_Stride => 1,
> > > [21.738179] Tiling => Linear ,
> > > [21.741993] Rotation => No_Rotation,
> > > [21.746153] Offset => 0xffffffff,
> > > [21.749966] BPC => 8),
> > > [21.753085] Mode =>
> > > [21.755424] (Dotclock => 148500000,
> > > [21.760192] H_Visible => 1920,
> > > [21.764524] H_Sync_Begin => 2008,
> > > [21.768857] H_Sync_End => 2052,
> > > [21.773190] H_Total => 2200,
> > > [21.777523] V_Visible => 1080,
> > > [21.781857] V_Sync_Begin => 1084,
> > > [21.786189] V_Sync_End => 1089,
> > > [21.790522] V_Total => 1125,
> > > [21.794855] H_Sync_Active_High => True,
> > > [21.799189] V_Sync_Active_High => True,
> > > [21.803521] BPC => 5)),
> > > [21.807767] Secondary =>
> > > [21.810281] (Port => Disabled,
> > > [21.813487] Framebuffer =>
> > > [21.816433] (Width => 1,
> > > [21.819727] Height => 1,
> > > [21.823020] Start_X => 0,
> > > [21.826313] Start_Y => 0,
> > > [21.829605] Stride => 1,
> > > [21.832899] V_Stride => 1,
> > > [21.836193] Tiling => Linear ,
> > > [21.840006] Rotation => No_Rotation,
> > > [21.844166] Offset => 0x00000000,
> > > [21.847979] BPC => 8),
> > > [21.851098] Mode =>
> > > [21.853438] (Dotclock => 24000000,
> > > [21.858118] H_Visible => 1,
> > > [21.862191] H_Sync_Begin => 1,
> > > [21.866263] H_Sync_End => 1,
> > > [21.870336] H_Total => 1,
> > > [21.874409] V_Visible => 1,
> > > [21.878482] V_Sync_Begin => 1,
> > > [21.882555] V_Sync_End => 1,
> > > [21.886629] V_Total => 1,
> > > [21.890702] H_Sync_Active_High => False,
> > > [21.895121] V_Sync_Active_High => False,
> > > [21.899541] BPC => 5)),
> > > [21.903787] Tertiary =>
> > > [21.906300] (Port => Disabled,
> > > [21.909507] Framebuffer =>
> > > [21.912453] (Width => 1,
> > > [21.915746] Height => 1,
> > > [21.919039] Start_X => 0,
> > > [21.922331] Start_Y => 0,
> > > [21.925624] Stride => 1,
> > > [21.928918] V_Stride => 1,
> > > [21.932211] Tiling => Linear ,
> > > [21.936023] Rotation => No_Rotation,
> > > [21.940183] Offset => 0x00000000,
> > > [21.943996] BPC => 8),
> > > [21.947116] Mode =>
> > > [21.949455] (Dotclock => 24000000,
> > > [21.954135] H_Visible => 1,
> > > [21.958207] H_Sync_Begin => 1,
> > > [21.962280] H_Sync_End => 1,
> > > [21.966353] H_Total => 1,
> > > [21.970427] V_Visible => 1,
> > > [21.974499] V_Sync_Begin => 1,
> > > [21.978572] V_Sync_End => 1,
> > > [21.982646] V_Total => 1,
> > > [21.986719] H_Sync_Active_High => False,
> > > [21.991138] V_Sync_Active_High => False,
> > > [21.995557] BPC => 5)));
> > > PCI: 00:02.0 init finished in 307222 usecs
> > > PCI: 00:02.1 init ...
> > > PCI: 00:02.1 init finished in 2009 usecs
> > > PCI: 00:1b.0 init ...
> > > [...]
> > > So it seems to have detected that my screen is 1920*1080. GPU + screen
> > > detection seems to be working. But i dont get any coreboot output on
> > > the
> > > screen.
> > > The output had worked fine on this screen with the OEM BIOS.
> > >
> > > coreboot mailing list: coreboot at coreboot.org
> > > https://mail.coreboot.org/mailman/listinfo/coreboot
>
> --
>
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