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From: Gerd Hoffmann <kraxel@redhat.com>
To: John Hunter <zhjwpku@gmail.com>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH] drm/bochs: convert bochs driver to atomic mode-setting
Date: Wed, 10 Jun 2015 10:04:45 +0200	[thread overview]
Message-ID: <1433923485.16508.40.camel@redhat.com> (raw)
In-Reply-To: <1433920899-23858-1-git-send-email-zhjwpku@gmail.com>

  Hi,

> As far as I know, the convertion got some problem, and after I
> add the bochs driver when I boot the qemu VM, it just can not
> start up, works fine if I delete bochs-drm.ko from it's directory.

With fbdev enabled alot initialization happens with some important
console lock taken, which has the effect that you don't see any kernel
messages until it all succeeded.  If it doesn't succeed you are stuck in
the dark.  Guess this is what happened ...

So, configure a serial console for your virtual machine.
Turn off fbdev support (bochs_drm has a module option for that).
That most likely gives you a clue where things blow up.

Then get X11 running.
kmscon is a nice test too.
When all this works try turning fbdev back on.

HTH,
  Gerd


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  reply	other threads:[~2015-06-10  8:04 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-10  7:21 [PATCH] drm/bochs: convert bochs driver to atomic mode-setting John Hunter
2015-06-10  8:04 ` Gerd Hoffmann [this message]
2015-06-10  8:15   ` John Hunter
2015-06-10 11:39     ` John Hunter
2015-06-10 12:20       ` Gerd Hoffmann
2015-06-11  3:18         ` John Hunter
2015-06-11  6:29           ` Gerd Hoffmann
2015-06-11  6:40             ` John Hunter

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