linux-kernel - Re: Radeon RV100 init fails with specific card+mobo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CADnq5_Ny9_OVqyahSN9WOuwt=PxbT48=NbWr0-r1A5y0yhHKhA@mail.gmail.com>
Date:	Fri, 1 Feb 2013 10:41:10 -0500
From:	Alex Deucher <alexdeucher@...il.com>
To:	Meelis Roos <mroos@...ux.ee>
Cc:	Jerome Glisse <j.glisse@...il.com>,
	Alex Deucher <alexander.deucher@....com>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: Radeon RV100 init fails with specific card+mobo - IRQ problem

On Fri, Feb 1, 2013 at 10:26 AM, Meelis Roos <mroos@...ux.ee> wrote:
>> > Adding some printks reveals it calls
>> > r100_init() -> radeon_irq_kms_init() -> drm_irq_install() ->
>> > drm_dev_to_irq() and that fails. So no IRQ, no KMS.
>> >
>> > lspci does not show Interrupt like on some other PCI devices.
>> > /proc/interrupts obviously does not contain the irq since we do not
>> > register any yet.
>> >
>> > There is no BIOS option of "Enable IRQ for VGA" or similar (BIOS is
>> > latest). Could this be the problem?
>> >
>> > What can I do to get KMS working on this computer?
>> >
>> > --
>> > Meelis Roos (mroos@...ux.ee)
>>
>> Try booting with radeon.agp_mode=-1
>
> radeon: `-1' invalid for parameter `agp_mode'

radeon.agpmode=-1

However, I think there are a number of places where we require
interrupts that would need to be worked around (fences, display
hotplug, pageflipping) if not interrupt is available.

Alex
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/