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

[Ryo ONODERA <ryo%tetera.org@localhost>]

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

From: Ryo ONODERA <ryo%tetera.org@localhost>
To: Rin Okuyama <rokuyama.rk%gmail.com@localhost>, gnats-bugs%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 18:31:23 +0900

 Hi,
 
 Rin Okuyama <rokuyama.rk%gmail.com@localhost> writes:
 
 > 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
 
 Thank you very much.
 Your patch fixes my problems on Dell XPS 13 9300 and HP Envy 13-at1052AU.
 
 Thanks again.
 
 > Thanks,
 > rin
 
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 Ryo ONODERA // ryo%tetera.org@localhost
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