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Re: [Qemu-devel] Resource reporting for VGA cards
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] Resource reporting for VGA cards |
Date: |
Tue, 23 Oct 2012 09:31:15 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.8) Gecko/20121012 Thunderbird/10.0.8 |
On 10/22/12 21:43, Hervé Poussineau wrote:
> Hello,
>
> I'm trying to add support for a S3 PCI VGA card to QEMU. It currently
> works on some non-x86 systems.
> However, on x86, it seems that the card is correctly detected, but there
> is no display at all; I think it is due to bad framebuffer address
> detection.
I'd tend to suspect vgabios issues.
> QEMU:
> Memory: 000A0000-000AFFFF
> Memory: 000B0000-000BFFFF
> I/O: 03B0-03BB
> I/O: 03C0-03DF
> Memory: FD000000-FDFFFFFF (BAR0)
> Memory: 000C0000-000CFFFF (rom file?)
> Memory: 04000000-04007FFF (???)
Can you try lspci in a linux guest?
Do you have a git tree somewhere?
> S3 card have a BAR0 of size 0x1000000 (16MB) for the framebuffer, and
> ROM is created with bochs vgabios.
I'd use seabios instead, but bochs vga should work too. Of course the
PCI IDs must be correct otherwise seabios ignores the rom.
> QEMU is launched with -m pc -device s3-trio.
/me suggests to add '-vga none' so you don't end up with both cirrus & s3
cheers,
Gerd