Re: kern/57035: On UEFI-booted NetBSD/amd64, genfb(4) freezes when WSDISPLAYIO_MODE_EMUL is set

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

The following reply was made to PR kern/57035; it has been noted by GNATS.

From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, ryoon%netbsd.org@localhost
Cc: 
Subject: Re: kern/57035: On UEFI-booted NetBSD/amd64, genfb(4) freezes when
 WSDISPLAYIO_MODE_EMUL is set
Date: Fri, 30 Sep 2022 16:47:59 +0900

 Hi,
 
 Although I could not reproduce the problem on my amd64 machine with
 genfb(4), I've found two bugs possibly related to this problem.
 
 When the mode is set to WSDISPLAYIO_MODE_EMUL:
 
 - if the device has 64-bit BARs, their lower words are zero-cleared
 - if its expansion ROM was disabled by default, it is disabled again
 
 Can you try this patch?
 https://gist.github.com/rokuyama/9c50609396df00882b57be2cc2f0bc52
 
 Thanks,
 rin