[coreboot] VGA doesn't work on Mohon Peak
wangfei.jimei at gmail.com
Thu Mar 19 15:58:56 CET 2015
Viktor, I've messed around VGA function on my platform before, I got the
problem to display seabios messages on VGA as well, finally I fed up and
enabled the bootsplash in coreboot instead, as along as the coreboot splash
can be shown on monitor, which proves the VGA function works, it's what I
want, maybe you want more...
Here is my suggestions, 1) Once the VGA option rom integrated in coreboot,
making sure it can be invoked during coreboot booting, you possible have to
change the debug level to 8 to get more coreboot debug message. I remember
it will show a message before/after VGA option rom invoked, searching "VGA"
or other keyword in your coreboot log to make sure it does happen. 2)
Enable boot splash on coreboot, making sure it can be shown up on your
I can not help you on seabios VGA function, I never make it work neither.
On Thu, Mar 19, 2015 at 10:22 AM, Kuzmichev Viktor <
kuzmichevviktorv at gmail.com> wrote:
> I'm using coreboot + SeaBIOS on Mohon Peak CRB. And I've tried to make VGA
> work for a while now. I used this article as a guide:
> Extracting VGA BIOS from vendor BIOS image did not work:
> $ ./bios_extract EDVLCRB1.86B.0043.R00.1408290947_MPK.bin
> Using file "EDVLCRB1.86B.0043.R00.1408290947_MPK.bin" (8192kB)
> Error: Unable to detect BIOS Image type.
> Then, I've downloaded VGA BIOS from here:
> Mohon Peak uses Aspeed VGA controller AST1300.
> And also, I've extracted Video ROM from /dev/mem:
> # dd if=/dev/mem of=vgabios.bin bs=1k count=32 skip=768
> Neither of them worked. Here's what I've tried. I've tried to add them via
> coreboot's menuconfig (' Add VGA BIOS image' option). I've tried to add
> them manually via cbfstool as an optionrom and as a raw file. I've tried to
> put them in CBFS under vgaroms/ directory. Here's my latest ROM-file layout:
> $ ./build/cbfstool build/coreboot.rom print
> coreboot.rom: 8192 kB, bootblocksize 1024, romsize 8388608, offset 0x600000
> alignment: 64 bytes, architecture: x86
> Name Offset Type Size
> cmos_layout.bin 0x600000 cmos_layout 1352
> pci1a03,2000.rom 0x600580 optionrom 32768
> fallback/romstage 0x6085c0 stage 26616
> fallback/ramstage 0x60ee00 stage 59904
> fallback/payload 0x61d840 payload 56100
> config 0x62b3c0 raw 4532
> revision 0x62c5c0 raw 708
> pci8086,1f41.rom 0x62c8c0 raw 61952
> vgaroms/pci1a03,2000.rom 0x63bb00 raw 32768
> img/Memtest86+(5.01) 0x643b40 payload 159492
> (empty) 0x66aa80 null 939288
> mrc.cache 0x74ffc0 (unknown) 65536
> cpu_microcode_blob.bin 0x760000 microcode 83968
> (empty) 0x774840 null 46936
> fsp.bin 0x77ffc0 (unknown) 372736
> (empty) 0x7db000 null 150424
> The entries pci1a03,2000.rom are the VGA ROMs there. I also tried to
> remove either of them. I've tested with coreboot option 'Run VGA Option
> ROMs' checked and unchecked without any difference. In SeaBIOS I set 'VGA
> Hardware Type (coreboot linear framebuffer)' as the other options are None,
> GeodeGX2 and GeodeLX, so coreboot linear framebuffer seemed more logical.
> I saw this mailing list:
> but found no solution there and it seems not to be my case as my board
> does not hang.
> I put coreboot and SeaBIOS output in the attachment. Debug levels set to 7
> for both. In coreboot only 'Output verbose CBFS debug messages' checked in
> 'Debugging' submenu.
> Is there anything I'm doing wrong or simply missing?
> coreboot mailing list: coreboot at coreboot.org
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