Re: [Xen-devel] pvops Dom0 graphics doesnt work with Intel i915

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Oct 06, 2010 at 10:50:57AM -0700, sanjay kushwaha wrote:
>    Hi,
>    I have run into more problems now. This time with VT-d.
>    When I enable VT-d on this laptop, graphics again stops working in dom0
>    with pvops (linux 2.6.32.21). the screen starts showing garbage as soon as
>    it switches into graphics mode.this happens when I boot the pvops kernel
>    both as dom0 and native linux. However, when I try 2.6.33 based pvops
>    kernel (stable-2.6.33.x) graphics seems to work fine with VT-d when
>    running native but it doesnt work when running as Dom0.
> 
>    so now the problem is:
> 
>    with stable-2.6.32.x: graphics works in Dom0 without Vt-d but not with
>    VT-d (neither native nor Dom0).
>    with stable-2.6.33.x: graphics works with VT-d when running native but
>    doesnt work when running as Dom0 (with or without VT-d).
> 

stable-2.6.33.x is not maintained, and you shouldn't use it.

I think Konrad has a backport of the 2.6.34 drm/dri drivers
to stable-2.6.32.x somewhere.. that might help.

http://wiki.xensource.com/xenwiki/XenPVOPSDRM

-- Pasi

>    I am experiencing this problem both with Lenovo T410, and Dell latitude
>    E6410.
>    Has anybody experienced this problem?
> 
>    Thanks,
>    Sanjay
> 
>    On Fri, Oct 1, 2010 at 11:06 AM, sanjay kushwaha
>    <[1]sanjay.kushwaha@xxxxxxxxx> wrote:
> 
>      havent tried stable-2.6.32.x on Radeon. It works with nomodeset and
>      nopat options with stable-2.6.33.x branch.
> 
>      On Fri, Oct 1, 2010 at 10:57 AM, Konrad Rzeszutek Wilk
>      <[2]konrad.wilk@xxxxxxxxxx> wrote:
> 
>        On Fri, Oct 01, 2010 at 10:06:48AM -0700, sanjay kushwaha wrote:
>        > When I dont use nomodeset option, dom0 boots fine X runs properly.
>        So Fedora
>        > 13 (X86_64) distro with stable-2.6.32.x pvops kernel and
>        xen-unstable works
>        > fine for i915 without nomodeset option.
> 
>        Good to hear it works for you.
> 
>        What about your radeon laptop?
>        >
>        > Thanks,
>        > Sanjay
>        >
>        > On Wed, Sep 29, 2010 at 3:56 PM, sanjay kushwaha
>        > <[3]sanjay.kushwaha@xxxxxxxxx>wrote:
>        >
>        > > Hi Jeremy,
>        > > I switched to stable-2.6.32.x branch (which is 2.6.32.21 based)
>        but I get
>        > > the same problem. Attached is the Xorg.0.log file when I booted
>        with
>        > > nomodeset option.
>        > >
>        > > interestingly I did not see any kernel or driver crash messages in
>        the
>        > > dmesg output. I do see these messages multiple times in
>        /var/log/messages
>        > > *
>        > > Sep 29 15:40:32 vwifi0 gdm-binary[2244]: WARNING: GdmDisplay:
>        display
>        > > lasted 0.048984 seconds
>        > > Sep 29 15:40:32 vwifi0 gdm-binary[2244]: WARNING:
>        GdmLocalDisplayFactory:
>        > > maximum number of X display failures reached: check X server log
>        for errors
>        > > *
>        > >
>        > > Thanks,
>        > > Sanjay
>        > >
>        > >
>        > > On Wed, Sep 29, 2010 at 11:57 AM, Jeremy Fitzhardinge
>        <[4]jeremy@xxxxxxxx>wrote:
>        > >
>        > >>  On 09/29/2010 11:12 AM, sanjay kushwaha wrote:
>        > >> > Hi Folks,
>        > >> > I am trying to boot latest xen-unstable on my laptop which has
>        Intel
>        > >> > i915 graphics. PVOPS dom0 is 2.6.33.6 based (from branch
>        > >> > xen/stable-2.6.33.x)
>        > >>
>        > >> Don't use that branch; it isn't supported (in fact, I deleted it
>        a while
>        > >> ago).  Use xen/stable-2.6.32.x for now.
>        > >>
>        > >>    J
>        > >>
>        > >> > and the distro is fedora 13 64-bit. The graphics doesnt come up
>        and it
>        > >> > seems that i915 driver is crashing multiple times. If I boot in
>        > >> > run-level 3 (without X) dom0 boots fine.
>        > >> > I tried booting the dom0 kernel with nomodeset and nopat
>        options
>        > >> > without any success. I searched on internet and found that
>        multiple
>        > >> > people have reported similar problem but I could not find any
>        solution.
>        > >> >
>        > >> > Has anybody found a solution or workaround to this problem?
>        > >> >
>        > >> > Thanks,
>        > >> > Sanjay
>        > >> >
>        > >> > PS: I have another laptop with same version of xen and pvops
>        dom0 but
>        > >> > it has ATI radeon graphics card. This laptop boots dom0 with
>        graphics
>        > >> > when I give nomodeset and nopat options (but fails if I dont
>        give
>        > >> > either of those two options).
>        > >> >
>        > >> >
>        > >> >
>        > >> > _______________________________________________
>        > >> > Xen-devel mailing list
>        > >> > [5]Xen-devel@xxxxxxxxxxxxxxxxxxx
>        > >> > [6]http://lists.xensource.com/xen-devel
>        > >>
>        > >>
>        > >
> 
>        > _______________________________________________
>        > Xen-devel mailing list
>        > [7]Xen-devel@xxxxxxxxxxxxxxxxxxx
>        > [8]http://lists.xensource.com/xen-devel
> 
>      --
>      ----------------------
>      Dr. Sanjay Kumar
>      Research Scientist
>      Intel Corporation
> 
>    --
>    ----------------------
>    Dr. Sanjay Kumar
>    Research Scientist
>    Intel Corporation
> 
> References
> 
>    Visible links
>    1. mailto:sanjay.kushwaha@xxxxxxxxx
>    2. mailto:konrad.wilk@xxxxxxxxxx
>    3. mailto:sanjay.kushwaha@xxxxxxxxx
>    4. mailto:jeremy@xxxxxxxx
>    5. mailto:Xen-devel@xxxxxxxxxxxxxxxxxxx
>    6. http://lists.xensource.com/xen-devel
>    7. mailto:Xen-devel@xxxxxxxxxxxxxxxxxxx
>    8. http://lists.xensource.com/xen-devel

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