From: "Michel Dänzer" <michel@daenzer.net>
To: Chris Wilson <chris@chris-wilson.co.uk>,
Andy Lutomirski <luto@amacapital.net>
Cc: DRI <dri-devel@lists.freedesktop.org>
Subject: Re: X using radeon is refusing to start
Date: Fri, 06 Feb 2015 17:37:59 +0900 [thread overview]
Message-ID: <54D47D67.3030700@daenzer.net> (raw)
In-Reply-To: <20150206082926.GE12153@nuc-i3427.alporthouse.com>
On 06.02.2015 17:29, Chris Wilson wrote:
> On Fri, Feb 06, 2015 at 11:51:55AM +0900, Michel Dänzer wrote:
>> On 06.02.2015 09:10, Andy Lutomirski wrote:
>>> I just started getting X failures that say:
>>>
>>> [ 739.208] (EE) RADEON(0): [drm] failed to set drm interface version.
>>>
>>> I'm not sure what triggered it.
>>>
>>> dmesg says:
>>>
>>> [ 740.156499] [drm:drm_stub_open]
>>> [ 740.156502] [drm:drm_open_helper] pid = 2170, minor = 0
>>> [ 740.156541] [drm:drm_ioctl] pid=2170, dev=0xe200, auth=1,
>>> DRM_IOCTL_MODE_GETRESOURCES
>>> [ 740.156557] [drm:drm_ioctl] pid=2170, dev=0xe200, auth=1,
>>> DRM_IOCTL_MODE_GETRESOURCES
>>> [ 740.156575] [drm:drm_release] open_count = 2
>>> [ 740.156577] [drm:drm_release] pid = 2170, device = 0xe200, open_count = 2
>>> [ 740.158548] [drm:drm_ioctl] pid=2170, dev=0xe200, auth=1,
>>> DRM_IOCTL_SET_VERSION
>>> [ 740.158549] [drm:drm_ioctl] ret = -13
>>> [ 740.159612] [drm:drm_framebuffer_reference] ffff8804457110a0: FB ID: 83 (3)
>>>
>>> -13 means -EACCES.
>>
>> We'd need to see dmesg from the beginning to be sure, but it looks like
>> something (maybe plymouth or whatever boot splash you're using?) is
>> keeping the DRM device open, so Xorg doesn't become DRM master.
>
> The trick is to inspect /sys/kernel/debug/dri/%d/clients at the time it
> fails and see who the kernel thinks is DRM_MASTER.
That's a neat trick, thanks.
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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prev parent reply other threads:[~2015-02-06 8:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-06 0:10 X using radeon is refusing to start Andy Lutomirski
2015-02-06 2:51 ` Michel Dänzer
2015-02-06 8:29 ` Chris Wilson
2015-02-06 8:37 ` Michel Dänzer [this message]
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