Carl-Daniel, I have to say that knowing that you have the same T60 and that it is working is a big moral boost!
Yes, the VGA port is working. Can you possibly expand on your instructions below? 1) You suggest that I patch the option ROM myself. Where would I find instructions on how to do this? 2) If I decide that I need to extract it from a running system then I presume that I need to re-flash the factory BIOS. Can I just do this with the same flashrom command that I used to flash coreboot? 3) On this page (http://www.coreboot.org/VGA_support) two ways of getting the video BIOS from a running system are listed ('Retrieval via Linux kernel' and 'Extraction from mapped memory'). Does it matter which one I try? 4) Can you be a lot more specific about what I should do about the checksum? Apologies if all these instructions are in the Wiki and I have been too dumb to find them. Regards, Richard On 27/06/15 23:19, Carl-Daniel Hailfinger wrote: > On 27.06.2015 23:39, Richard Simpson wrote: >> Hello, >> >> I have finally successfully flashed the BIOS on my T60 with coreboot. >> Sadly, my ATI controlled screen remains completely black. Fortunately I >> can still get in via ssh. Here is what I can deduce so far.+ > > AFAICS you have exactly the same T60 as I have. > > >> lspci says: >> 01:00.0 0300: 1002:7145 (prog-if 00 [VGA controller]) >> Subsystem: 1002:0000 >> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- >> ParErr- Stepping- SERR- FastB2B- DisINTx- >> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- >> <TAbort- <MAbort- >SERR- <PERR- INTx- >> Latency: 0, Cache Line Size: 64 bytes >> Interrupt: pin A routed to IRQ 16 >> Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M] >> Region 1: I/O ports at 4000 [size=256] >> Region 2: Memory at ec120000 (32-bit, non-prefetchable) [size=64K] >> Expansion ROM at ec100000 [disabled] [size=128K] >> Capabilities: <access denied> >> Kernel driver in use: radeon >> >> The vgabios which I extracted from the factory bios > > Ah yes. Bad idea. AFAIK the factory BIOS patches the VGA optionrom at > runtime with the correct values for the LVDS panel. This means you > either have to patch the VGA optionrom yourself or you have to extract > the VGA optionrom from the memory of the running system. If you extract > it from memory, please note that the runtime patching causes the > checksum to be incorrect, and you either have to fix the checksum or > tell SeaBIOS to ignore the checksum. > > >> reports as follows: >> >> Image 1: >> PCI Expansion ROM Header: >> Signature: 0x55aa (Ok) >> CPU unique data: 0x7e 0xe9 0x6f 0x02 0x00 0x00 0x00 0x00 >> 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 >> Pointer to PCI Data Structure: 0x0230 >> >> PCI Data Structure: >> Signature: 0x50434952 'PCIR' (Ok) >> Vendor ID: 0x1002 >> Device ID: 0x7145 >> Vital Product Data: 0x0000 >> PCI Data Structure Length: 0x0018 (24 bytes) >> PCI Data Structure Revision: 0x00 >> Class Code: 0x030000 (VGA Display controller) >> Image Length: 0x007e blocks (64512 bytes) >> Revision Level of Code/Data: 0x090c >> 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: 0x7e (64512 bytes) >> Entry point for INIT function: 0x275 >> >> This looks like the right VGA BIOS to me. >> >> Once I have added it to the coreboot image I can check the contents as >> follows: >> >> coreboot.rom: 2048 kB, bootblocksize 952, romsize 2097152, offset 0x0 >> alignment: 64 bytes, architecture: x86 >> >> Name Offset Type Size >> cmos.default 0x0 cmos_default 256 >> cmos_layout.bin 0x140 cmos_layout 1824 >> fallback/dsdt.aml 0x8c0 raw 12037 >> cpu_microcode_blob.bin 0x3800 microcode 94208 >> etc/ps2-keyboard-spinup 0x1a880 raw 8 >> config 0x1a8c0 raw 4046 >> revision 0x1b8c0 raw 571 >> (empty) 0x1bb40 null 17432 >> fallback/romstage 0x1ff80 stage 36524 >> fallback/ramstage 0x28ec0 stage 53635 >> fallback/payload 0x36080 payload 55837 >> pci1002,7145.rom 0x43b00 raw 64512 >> (empty) 0x53740 null 1754264 >> >> I would be most grateful for any suggestions as to where I might be >> going wring or further diagnostics. > > On the first coreboot try I had a black screen as well on my T60 (ATI > graphics). Funnily enough, the external VGA worked. Could you check if > that's the case for you? > > Regards, > Carl-Daniel > -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
