Hi Lukasz, maybe there is a way to run coreboot (coreboot-libre) without the VGABIOS blob on your T60. You may check if you are running coreboot with dual channel LVDS mode enforced (register "gfx.lvds_dual_channel" = "1"). If this is true, changing to single channel LVDS mode (register "gfx.lvds_dual_channel" = "0") may result in native graphics initialization. This would be the inversely workaround for a T400 with a "high-resolution" display [1]. Best Regards, Kroms
[1] http://libreboot.org/docs/hcl/gm45_lcd.html Am 14.08.2015 15:08 schrieb Łukasz Dmitrowski: > Problem solved after using VGABIOS extracted from factory BIOS instead > of one extracted from memory. > > Regards, > Lukasz Dmitrowski > > On 14.08.2015 13:29, Łukasz Dmitrowski wrote: >> Hello, >> >> I am trying to run coreboot with seabios payload on Lenovo T60: >> >> Graphic: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) >> Display panel: LTN141XA-L01 >> >> So, graphic is Intel, but display panel LTN141XA-L01 is not supported for native >> graphics initialization. I dumped VGABIOS from memory and attached it to the ROM file: >> >> ./cbfstool coreboot.rom add -f vgabios_from_mem.bin -n pci8086,27a2.rom -t raw >> ./cbfstool coreboot.rom add-int -i 0 -n etc/optionroms-checksum >> >> Unfortunately after powering on - screen is black. Did I miss something? >> >> -------------------------------- >> >> VGABIOS which I use: >> >> Image 1: >> PCI Expansion ROM Header: >> Signature: 0x55aa (Ok) >> CPU unique data: 0x75 0xe9 0xa9 0xe3 0x30 0x30 0x30 0x30 >> 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 >> Pointer to PCI Data Structure: 0x0040 >> >> PCI Data Structure: >> Signature: 0x50434952 'PCIR' (Ok) >> Vendor ID: 0x8086 >> Device ID: 0x27a2 >> Vital Product Data: 0x0000 >> PCI Data Structure Length: 0x0018 (24 bytes) >> PCI Data Structure Revision: 0x00 >> Class Code: 0x030000 (VGA Display controller) >> Image Length: 0x0080 blocks (65536 bytes) >> Revision Level of Code/Data: 0x0000 >> Code Type: 0x00 (Intel x86) >> Last-Image Flag: 0x80 (last image in rom) >> Reserved: 0x0000 >> >> Platform specific data for x86 compliant option rom: >> Initialization Size: 0x75 (59904 bytes) >> Entry point for INIT function: 0xe3af >> >> ----------------------------------- >> >> ROM contents: >> >> cmos.default 0x0 cmos_default 256 >> cmos_layout.bin 0x140 cmos_layout 1824 >> fallback/dsdt.aml 0x8c0 raw 12037 >> fallback/romstage 0x3800 stage 36472 >> fallback/ramstage 0xc6c0 stage 53914 >> fallback/payload 0x199c0 payload 55825 >> etc/ps2-keyboard-spinup 0x27440 raw 8 >> config 0x27480 raw 82 >> revision 0x27500 raw 569 >> etc/optionroms-checksum 0x27780 raw 8 >> pci8086,27a2.rom 0x277c0 raw 32768 >> (empty) 0x2f800 null 1901528 >> >> ------------------------------------ >> >> Regards, >> Lukasz Dmitrowski >> >> >>