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Message-ID: <20140514204738.60a2f49c@neptune.home> Date: Wed, 14 May 2014 20:47:38 +0200 From: Bruno Prémont <bonbons@...ux-vserver.org> To: Carbonated Beverage <ramune@...chosnugglebunnies.net> Cc: linux-kernel@...r.kernel.org, Intel Graphics Development <intel-gfx@...ts.freedesktop.org> Subject: Re: 3.14.3 i915 dead display under X11 CCing intel-gfx as otherwise it will probably not get seen by developers. On Sun, 11 May 2014 Carbonated Beverage <ramune@...chosnugglebunnies.net> wrote: > Hi all, > > I rarely upgrade kernels these days -- so when updating to 3.14.3, I found > the X display was blank -- switching to a text console appears to work, but > I still have to type blind. > > Symptoms: > > Text mode and KMS works correctly to come up with the text console. Running > X (whether through xdm or /usr/bin/Xorg) causes the display to go blank > and apparently turn off. Switching to a text console via Control-Alt-F# > leaves a mostly blank screen up, but there are brief flashes where it looks > like the contents of the text console gets rendered once every 5 seconds or so, > but so fast no words or letters can be recognized. > > System: > > * Thinkpad R61 > * 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c) > * Debian/wheezy > * xserver-xorg-video-intel 2:2.19.0-6 > > A diff of the Xorg.0.log (with timestamps removed, as it made almost every line > show up in the diff) trimmed down shows: > > @@ -53,7 +53,7 @@ > (==) |-->Input Device "<default keyboard>" > (==) The core keyboard device wasn't specified explicitly in the layout. > Using the default keyboard configuration. > - (II) Loader magic: 0x7f2813451ae0 > + (II) Loader magic: 0x7f492c35aae0 > (II) Module ABI versions: > X.Org ANSI C Emulation: 0.4 > X.Org Video Driver: 12.1 > @@ -170,15 +170,17 @@ > Sandybridge Server, Ivybridge Mobile (GT1), Ivybridge Mobile (GT2), > Ivybridge Desktop (GT1), Ivybridge Desktop (GT2), Ivybridge Server, > Ivybridge Server (GT2) > - (--) using VT number 7 > + (++) using VT number 7 > > + (WW) xf86OpenConsole: setpgid failed: Operation not permitted > + (WW) xf86OpenConsole: setsid failed: Operation not permitted > (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support > drmOpenDevice: node name is /dev/dri/card0 > - drmOpenDevice: open result is 10, (OK) > + drmOpenDevice: open result is 8, (OK) > drmOpenByBusid: Searching for BusID pci:0000:00:02.0 > drmOpenDevice: node name is /dev/dri/card0 > - drmOpenDevice: open result is 10, (OK) > - drmOpenByBusid: drmOpenMinor returns 10 > + drmOpenDevice: open result is 8, (OK) > + drmOpenByBusid: drmOpenMinor returns 8 > drmOpenByBusid: drmGetBusid reports pci:0000:00:02.0 > (**) intel(0): Depth 16, (--) framebuffer bpp 16 > (==) intel(0): RGB weight 565 > @@ -387,7 +389,17 @@ > (II) AutoAddDevices is off - not adding device. > (II) config/udev: Adding input device ThinkPad Extra Buttons (/dev/input/event5) > (II) AutoAddDevices is off - not adding device. > - (II) AIGLX: Suspending AIGLX clients for VT switch > - (II) UnloadModule: "kbd" > - (II) UnloadModule: "mouse" > - Server terminated successfully (0). Closing log file. > + (II) intel(0): EDID vendor "LEN", prod id 16435 > + (II) intel(0): Printing DDC gathered Modelines: > + (II) intel(0): Modeline "1440x900"x0.0 97.78 1440 1488 1520 1760 900 903 909 926 -hsync -vsync (55.6 kHz eP) > + (II) intel(0): Modeline "1440x900"x0.0 81.49 1440 1488 1520 1760 900 903 909 926 -hsync -vsync (46.3 kHz e) > + (II) intel(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz e) > + (II) intel(0): Modeline "640x480"x0.0 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz e) > + (II) intel(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz e) > + (II) intel(0): EDID vendor "LEN", prod id 16435 > + (II) intel(0): Printing DDC gathered Modelines: > + (II) intel(0): Modeline "1440x900"x0.0 97.78 1440 1488 1520 1760 900 903 909 926 -hsync -vsync (55.6 kHz eP) > + (II) intel(0): Modeline "1440x900"x0.0 81.49 1440 1488 1520 1760 900 903 909 926 -hsync -vsync (46.3 kHz e) > + (II) intel(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz e) > + (II) intel(0): Modeline "640x480"x0.0 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz e) > + (II) intel(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz e) > > Bisecting from 3.13.6 (good) to 3.14.3 (bad) ended up with... > > commit b35684b8fa94e04f55fd38bf672b737741d2f9e2 > Author: Jani Nikula <jani.nikula@...el.com> > Date: Thu Nov 14 12:13:41 2013 +0200 > > drm/i915: do full backlight setup at enable time > > We should now have all the information we need to do a full > initialization of the backlight registers. > > v2: Keep QUIRK_NO_PCH_PWM_ENABLE for now (Imre). > > Signed-off-by: Jani Nikula <jani.nikula@...el.com> > Reviewed-by: Imre Deak <imre.deak@...el.com> > Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch> > > Which is in 3.12.0???? > > I'm not sure how that came to be. Does that look right? What other > information would be required to track this down? > > Thanks, > > -- DN > Daniel Nobuto -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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