Date: Tue, 12 Jun 2012 15:55:53 +0100 From: Anton Shterenlikht <mexas@bristol.ac.uk> To: Hans Ottevanger <hans@beastielabs.net> Cc: Anton Shterenlikht <mexas@bristol.ac.uk>, freebsd-questions@freebsd.org, Subhro Sankha Kar <subhro@80386.org> Subject: Re: can't kill -9 Xorg Message-ID: <20120612145553.GA38503@mech-cluster241.men.bris.ac.uk> In-Reply-To: <4FD7325D.2000506@beastielabs.net> References: <20120611113135.GA99238@mech-cluster241.men.bris.ac.uk> <C60CD1C4-067D-4475-B0EF-552D1BE22BE2@80386.org> <20120612081306.GA25637@mech-cluster241.men.bris.ac.uk> <20120612082456.GA25893@mech-cluster241.men.bris.ac.uk> <4FD7325D.2000506@beastielabs.net>
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On Tue, Jun 12, 2012 at 02:13:17PM +0200, Hans Ottevanger wrote: > On 06/12/12 10:24, Anton Shterenlikht wrote: > >On Tue, Jun 12, 2012 at 09:13:06AM +0100, Anton Shterenlikht wrote: > >>On Tue, Jun 12, 2012 at 12:07:06AM +0530, Subhro Sankha Kar wrote: > >>>Hello > >>> > >>>What happens if you run without a xorg.conf? Xorg has become pretty good > >>>at guessing correct settings these days. > >>> > >> > >>No change. > >>I removed /etc/X11/xorg.conf completely. > > > >Anyway, I can understand my X setup is fucked, no problem. > > > >What worries me more is the the fact that a process ignores > >kill -9. Doesn't it indicate a problem with the OS? > >I think potentially this is a security vulnerability. > > > > I had a similar issue with my desktop system a while ago, also using a > Radeon adaptor. In my case the system ended up with a frozen image or > black screen and was only accessible remotely. It appeared that the X > server took 100% of a CPU and was looping in the driver in kernel space > and thus unkillable. If a remember well a PCIE register seemed to be > inaccessible after returning from the screen saver and the driver kept > looping on this. > > I finally worked around the problem by removing the (barely documented) > option DynamicPM from my xorg.conf. This could have consequences for > power saving on a laptop however, but it could be worth trying. > > Kind regards, > > Hans Thank you for the explanation. I my case Option "DRI" "off" helped. With DRI off I get X working (nearly) as expected. However, I'm now thinking that DRI not working is perhaps a bug? I'm using xf86-video-ati-6.14.3_1 with Driver "radeon" VendorName "Advanced Micro Devices [AMD] nee ATI" BoardName "RS690M [Radeon X1200 Series]" Maybe I should ask in x11@? -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423
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