Date: Mon, 16 Jul 2012 17:04:52 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Kevin Oberman <kob6558@gmail.com> Cc: freebsd-x11@freebsd.org Subject: Re: Intel GPU with KMS locks up when visualization enabled Message-ID: <20120716140452.GC2676@deviant.kiev.zoral.com.ua> In-Reply-To: <CAN6yY1t2ScB8E4NXamz_x=zYQBeP_O8LuZ9vuve4e05O4Ayv6g@mail.gmail.com> References: <CAN6yY1t2ScB8E4NXamz_x=zYQBeP_O8LuZ9vuve4e05O4Ayv6g@mail.gmail.com>
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--PuGuTyElPB9bOcsM Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jul 15, 2012 at 04:09:18PM -0700, Kevin Oberman wrote: > I don't have much information on this, but I wanted to enable VY-x on > my Lenovo T520 (Sandybridge). IT has been running for a few months > with the Intel GPU patches and now WITH_NEW_XORG and WITH_KMS. The > current system is 9.1-BETA1 installed yesterday. >=20 > If I enable "Virtualization" in BIOS, the system boots and runs fine, > but if I start Xorg and Gnome, I get several windows including > terminal windows and gkrellm up, but after a few seconds, the display > freezes. The only thing I have been able to do is to power it down. I > then disabled "Virtualization again, and all is well. >=20 > Any idea on what other information I can dig up? It's not critical as > I only use VirtualBox to boot Windows 7 when I need Visio or something > else that is only available on Windows.(No, no serial console. Darn!) SandyBridges has several absolutely show-stopper erratas for interoperation of VT-d engine and GPU. Linux disables several features, including RC6 and fake PPGT, when it detects that VT-d is active for GPU PCI device. And even then, it seems to still exhibit problems, last time I watched. Since FreeBSD has no VT-d driver, we cannot know the state of VT-d. Just disable it if you want to use GPU. --PuGuTyElPB9bOcsM Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAlAEH4QACgkQC3+MBN1Mb4j9xQCgypNWJLwGCNY2MRbRgg+k6443 NnYAn3gs/ME9x2TFA/vHaYS6X+JOKQ5B =f3DU -----END PGP SIGNATURE----- --PuGuTyElPB9bOcsM--
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