Hello,
Recently my qemu with gpu passthrough setup quit working.
I think it is seabios related. i have turned on debugging for seabios.
Here is the output from seabios from a successful windows 10 boot using an emulated vga adapter:
Here is the output when using my nvidia gtx 880m 8gb gaming card:
when seabios runs the option rom for nvidia it just halts.
i have never debuged seabios before so i dont know what would normally show up at this point. i.e. is this normal or is something wrong.
during the vga boot all 8 cpus go to 100% for a short time then drop.
during the failed boot with nvidia 1 cpu goes to 100% and stays there forever. i have let it run all night at times.
i am seeking to figure out if i have a seabios issue.
i am running linux mint 18.3 and the repo copy of seabios is 1.8.2.
i have booted this 100's of times and never had an issue before. thanks
On Wed, Jun 20, 2018 at 04:39:33PM -0400, Roger Lawhorn wrote:
Hello,
Recently my qemu with gpu passthrough setup quit working.
I think it is seabios related. i have turned on debugging for seabios.
Here is the output from seabios from a successful windows 10 boot using an emulated vga adapter:
Here is the output when using my nvidia gtx 880m 8gb gaming card:
The last message in that log:
Running option rom at c000:0003
indicates that SeaBIOS executed the option rom. Likely, the option rom code failed and never returned to SeaBIOS. Unfortunately, there's no good way to debug what went wrong as we don't have access to the option rom code.
If this is a regression, you might try going through "git bisect" with qemu and/or seabios to try and determine what change resulted in the regression.
-Kevin
nevermind. i had to use nomodeset on boot. i have nvidia optimus. not only does the nvidia and nouveau drivers grab and hold my video chips, but now i915 does also. i915 driver was the issue. with nomodeset i am running fbdev and nothing else. it all works now.
On 06/30/2018 09:31 PM, Kevin O'Connor wrote:
On Wed, Jun 20, 2018 at 04:39:33PM -0400, Roger Lawhorn wrote:
Hello,
Recently my qemu with gpu passthrough setup quit working.
I think it is seabios related. i have turned on debugging for seabios.
Here is the output from seabios from a successful windows 10 boot using an emulated vga adapter:
Here is the output when using my nvidia gtx 880m 8gb gaming card:
The last message in that log:
Running option rom at c000:0003
indicates that SeaBIOS executed the option rom. Likely, the option rom code failed and never returned to SeaBIOS. Unfortunately, there's no good way to debug what went wrong as we don't have access to the option rom code.
If this is a regression, you might try going through "git bisect" with qemu and/or seabios to try and determine what change resulted in the regression.
-Kevin
-
Kevin O'Connor -
Roger Lawhorn