Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: 2.6.27-rc8-git8: oops in process hald-addon-dell-backlight (intel iommu related?) | Date | Sat, 25 Oct 2008 13:21:33 +0200 |
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On Saturday, 25 of October 2008, Frederik Himpe wrote: > On vr, 2008-10-24 at 23:49 +0200, Rafael J. Wysocki wrote: > > On Wednesday, 8 of October 2008, Frederik Himpe wrote: > > > On Wed, 08 Oct 2008 20:15:37 +0000, Frederik Himpe wrote: > > > > > > > On my Dell Latitude E6400 system with Intel chipset and graphics, I get > > > > this oops in my 2.6.27-rc8-git8 based kernel, which probably happens > > > > when hald-addon-dell-backlight is started. > > > > > > > > Complete dmesg and lspci info: > > > > https://qa.mandriva.com/show_bug.cgi?id=44711 > > > > > > Booting with intel_iommu=off seems to fix this issue, and seems to make my > > > e1000e based network card stop from giving "transmit timed out" errors > > > after which it stopped working. > > > > Is it necessary to boot 2.6.27 final on this box with intel_iommu=off, and if > > so, is it still necessary in mainline? > > I just tested stock 2.6.27.3 and this machine (Dell Latitude E6400) is > totally unusable without intel_iommu=off if Intel VT is enabled in the > BIOS. During the boot process, stack traces start scrolling over the > screen. In the end, it goes on starting X, and from that moment, the > machine locks up completely. Booting in runlevel 3, I see lots of stack > traces (too much to even be able to read them). > > In the past (with Mandriva's 2.6.27-rc) it would at least succeed in > booting (with one or a few backtraces), but even then the e1000e network > card would timeout a few seconds after when starting to transfer some > data, after which the network was totally unusable until a reboot. A > reader of my blog confirmed having the same problem on this same type of > laptop and also solving it by using intel_iommu=off. > > I entered some more information here: > http://bugzilla.kernel.org/show_bug.cgi?id=11821
OK, thanks.
I won't consider this as a regression, then.
Rafael
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