From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Bolle Subject: Re: 4.1-rc7: Xorg broken after resume on thinkpad T40p, radeon problem? Date: Wed, 17 Jun 2015 15:50:17 +0200 Message-ID: <1434549017.2400.3.camel@x220> References: <20150617124347.GA22879@amd> <20150617124949.GA22953@amd> <5581711D.6030707@amd.com> <20150617132121.GA24634@amd> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20150617132121.GA24634@amd> Sender: linux-acpi-owner@vger.kernel.org To: Pavel Machek Cc: Christian =?ISO-8859-1?Q?K=F6nig?= , dri-devel@lists.freedesktop.org, alexander.deucher@amd.com, rjw@rjwysocki.net, lenb@kernel.org, kernel list , linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org List-Id: linux-pm@vger.kernel.org On Wed, 2015-06-17 at 15:21 +0200, Pavel Machek wrote: > On Wed 2015-06-17 15:07:41, Christian K=C3=B6nig wrote: > > On 17.06.2015 14:49, Pavel Machek wrote: > > >On Wed 2015-06-17 14:43:47, Pavel Machek wrote: > > >>Hi! > > >> > > >>Video is broken on thinkpad T40p after resume from suspend. (In X > > >>only, text console still works.) > > >> > > >>Maybe this is related? > > >> > > >>[ 5430.193071] radeon 0000:01:00.0: putting AGP V2 device into 4x= mode > > >>[ 5430.193107] radeon 0000:01:00.0: GTT: 256M 0xD0000000 - 0xDFFF= =46FFF > > >>[ 5430.214670] radeon 0000:01:00.0: WB disabled > > >>[ 5430.214675] radeon 0000:01:00.0: fence driver on ring 0 use gp= u addr 0x00000000d0000000 and cpu addr 0xf841a000 > > >>[ 5430.214721] [drm] radeon: ring at 0x00000000D0001000 > > >>[ 5430.370867] [drm:r100_ring_test] *ERROR* radeon: ring test fai= led (scratch(0x15E8)=3D0xCAFEDEAD) > > >>[ 5430.370869] [drm:r100_cp_init] *ERROR* radeon: cp isn't workin= g (-22). > > >>[ 5430.370872] radeon 0000:01:00.0: failed initializing CP (-22). > > >> > > >>Hibernation works well here, including X. (Which has small glitch= with > > >>mouse cursor being corrupted until it is changed by application). > > >> > > >3.16.0-4-686-pae Debian 3.16.7-cktt11-1 kernel seems to have same > > >problem, with same scratch(0x15E8)=3D0xCAFEDEAD message... so this= is > > >not "new" problem... > > > >=20 > > Looks like CP init doesn't work. Well is there any kernel where tha= t did > > worked? >=20 > Unfortunately, not as far as I know. >=20 > > If yes it might be a good idea to bisect to narrow down the problem= =2E >=20 > No such luck. I may try something like "3.0" if we are really > desperate (2.6.X kernels probably won't won't boot with recent > userland), but I suspect it just never worked. The above looks very much like the issue that made me write commit 45171002b01b ("radeon: add AGPMode 1 quirk for RV250"). See https://bugzilla.redhat.com/show_bug.cgi?id=3D531825 for a lot of background. Does booting with radeon.agpmode=3D1 survive a suspend and resume cycle= ? Hope this helps, Paul Bolle -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html