From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Singapore Citizen Mr. Teo En Ming (Zhang Enming)" Subject: Re: Cannot start Fedora 19 HVM domU with VGA passthru Date: Thu, 18 Jul 2013 18:20:08 +0800 Message-ID: <51E7C158.5090706@gmail.com> References: <51E6B95E.3020500@gmail.com> <20130717215625.GL2924@reaktio.net> <51E7A94E.50005@gmail.com> <6d8cfa90cde86eca5915ff398872b459@mail.shatteredsilicon.net> <51E7BE5F.8000504@gmail.com> Reply-To: singapore.mr.teo.en.ming@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Gordan Bobic Cc: xen-users@lists.xen.org, "Teo En Ming (Zhang Enming)" , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 18/07/2013 18:09, Gordan Bobic wrote: > On Thu, 18 Jul 2013 18:07:27 +0800, "Singapore Citizen Mr. Teo En Ming > (Zhang Enming)" wrote: >> On 18/07/2013 16:46, Gordan Bobic wrote: >>> On Thu, 18 Jul 2013 16:37:34 +0800, "Singapore Citizen Mr. Teo En >>> Ming (Zhang Enming)" wrote: >>> >>>> Although Fedora 19 HVM domU with VGA passthrough cannot start, Debian >>>> 7.1.0 amd64 HVM domU with VGA passthrough can start. In Debian 7.1.0 >>>> amd64 HVM domU with VGA passthrough, Intel HD Graphics 4600 is listed >>>> in lspci -vvv. Please refer to lspci.txt. It is strange that no kernel >>>> module is being loaded for Intel HD Graphics 4600. There is no "Kernel >>>> driver in use" statement after VGA compatible controller: Intel >>>> Corporation Haswell Integrated Graphics Controller (rev 06) (prog-if >>>> 00 [VGA controller]). >>>> >>>> No kernel driver is seen in lsmod. Please refer to lsmod.txt >>>> >>>> When I tried to load the kernel module by executing "modprobe i915", >>>> it complains "no such device". >>>> >>>> ERROR: could not insert 'i915': No such device >>>> >>>> So is my Intel HD Graphics 4600 VGA Passthrough to Debian 7.1.0 amd64 >>>> HVM domU considered successful since the i915 driver cannot be loaded? >>>> >>>> Thank you very much. >>> >>> If you have a driver in dom0 claiming the device (other than the >>> xen-pciback >>> driver), you cannot pass through that device. If you do lspci -ccc >>> on F19 >>> and you see the driver in use for that device being something other >>> than >>> xen-pciback, that would explain why you can't pass it through. >>> >>> Also, did you first do xl pci-assignable-add for that device? This >>> attempts >>> to detach the device from it's current driver but doesn't always work >>> especially for GPUs. The only solution is blacklist the driver for the >>> device in dom0. The downside is that you cannot run a GUI in dom0 on >>> that >>> device. >>> >>> Gordan >>> >> Dear Gordan, >> >> I cannot start Fedora 19 HVM domU with VGA passthrough at all. Could >> you advise me on the workaround? >> >> As for the Intel HD Graphics (i915) driver, I have it blacklisted in >> /etc/modprobe.d/blacklist.conf already. Please refer to attached >> blacklist.conf. > > Have you confirm that no other driver is bound to the device in lspci > -vvv? > Also what version of Xen are you running on each of the distros, and > which > dom0 kernel? > > Gordan > Dear Gordan, I have checked "lsmod | grep i915" and the command doesn't return anything, which means the kernel module i915 is not loaded in dom0. I am running Xen 4.4-unstable changeset 27238 with Linux kernel 3.11.0-rc1 on a Ubuntu 13.04 host. -- Yours sincerely, Singapore Citizen Mr. Teo En Ming (Zhang Enming)