I guess I have the same problem.
I'm not able to login anymore in kde and trying to figuring out why, I
noticed glx doesn't work.
I tried to generate xorg.conf with Xorg -configure e this is the log:
[ 1677.834]
X.Org X Server 1.17.2
Release Date: 2015-06-16
[ 1677.834] X Protocol Version 11, Revision 0
[ 1677.834] Build Operating System: Linux 4.1.0 x86_64 Debian
[ 1677.834] Current Operating System: Linux adam 4.1.0-2-amd64 #1 SMP
Debian 4.1.6-1 (2015-08-23) x86_64
[ 1677.834] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.1.0-2-amd64
root=UUID=5b0c290e-ac1a-425f-806c-560cfc38973f ro quiet
[ 1677.834] Build Date: 11 August 2015 10:51:15AM
[ 1677.834] xorg-server 2:1.17.2-1.1 (http://www.debian.org/support)
[ 1677.835] Current version of pixman: 0.32.6
[ 1677.835] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 1677.835] Markers: (--) probed, (**) from config file, (==) default
setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 1677.835] (==) Log file: "/var/log/Xorg.0.log", Time: Sun Aug 30
15:36:39 2015
[ 1677.835] (II) Loader magic: 0x561442cddd40
[ 1677.835] (II) Module ABI versions:
[ 1677.835] X.Org ANSI C Emulation: 0.4
[ 1677.835] X.Org Video Driver: 19.0
[ 1677.835] X.Org XInput driver : 21.0
[ 1677.835] X.Org Server Extension : 9.0
[ 1677.835] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 1677.837] (--) PCI:*(0:0:2:0) 8086:0166:17aa:3977 rev 9, Mem @
0xd0000000/4194304, 0xc0000000/268435456, I/O @ 0x00003000/64
[ 1677.837] List of video drivers:
[ 1677.837] siliconmotion
[ 1677.837] openchrome
[ 1677.837] radeon
[ 1677.837] nouveau
[ 1677.837] intel
[ 1677.837] mach64
[ 1677.838] savage
[ 1677.839] trident
[ 1677.839] ati
[ 1677.840] tdfx
[ 1677.841] vmware
[ 1677.842] cirrus
[ 1677.843] r128
[ 1677.843] mga
[ 1677.844] sisusb
[ 1677.845] qxl
[ 1677.845] neomagic
[ 1677.846] vesa
[ 1677.847] fbdev
[ 1677.847] modesetting
[ 1677.847] (II) LoadModule: "siliconmotion"
[ 1677.848] (II) Loading /usr/lib/xorg/modules/drivers/siliconmotion_drv.so
[ 1677.898] (II) Module siliconmotion: vendor="X.Org Foundation"
[ 1677.898] compiled for 1.17.1, module version = 1.7.8
[ 1677.898] Module class: X.Org Video Driver
[ 1677.898] ABI class: X.Org Video Driver, version 19.0
[ 1677.905] (II) LoadModule: "openchrome"
[ 1677.905] (II) Loading /usr/lib/xorg/modules/drivers/openchrome_drv.so
[ 1678.023] (II) Module openchrome: vendor="http://openchrome.org/";
[ 1678.023] compiled for 1.17.1, module version = 0.3.3
[ 1678.023] Module class: X.Org Video Driver
[ 1678.023] ABI class: X.Org Video Driver, version 19.0
[ 1678.023] (II) LoadModule: "radeon"
[ 1678.023] (II) Loading /usr/lib/xorg/modules/drivers/radeon_drv.so
[ 1678.170] (II) Module radeon: vendor="X.Org Foundation"
[ 1678.170] compiled for 1.17.1, module version = 7.5.0
[ 1678.170] Module class: X.Org Video Driver
[ 1678.170] ABI class: X.Org Video Driver, version 19.0
[ 1678.170] (II) LoadModule: "nouveau"
[ 1678.170] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
[ 1678.237] (II) Module nouveau: vendor="X.Org Foundation"
[ 1678.237] compiled for 1.17.1, module version = 1.0.11
[ 1678.237] Module class: X.Org Video Driver
[ 1678.237] ABI class: X.Org Video Driver, version 19.0
[ 1678.237] (II) LoadModule: "intel"
[ 1678.238] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 1678.238] (II) Module intel: vendor="X.Org Foundation"
[ 1678.238] compiled for 1.17.2, module version = 2.99.917
[ 1678.238] Module class: X.Org Video Driver
[ 1678.238] ABI class: X.Org Video Driver, version 19.0
[ 1678.238] (II) LoadModule: "mach64"
[ 1678.238] (II) Loading /usr/lib/xorg/modules/drivers/mach64_drv.so
[ 1678.338] (II) Module mach64: vendor="X.Org Foundation"
[ 1678.338] compiled for 1.17.1, module version = 6.9.5
[ 1678.338] Module class: X.Org Video Driver
[ 1678.338] ABI class: X.Org Video Driver, version 19.0
[ 1678.338] (II) LoadModule: "savage"
[ 1678.338] (II) Loading /usr/lib/xorg/modules/drivers/savage_drv.so
[ 1678.383] (II) Module savage: vendor="X.Org Foundation"
[ 1678.383] compiled for 1.17.1, module version = 2.3.8
[ 1678.383] Module class: X.Org Video Driver
[ 1678.383] ABI class: X.Org Video Driver, version 19.0
[ 1678.383] (II) LoadModule: "trident"
[ 1678.383] (II) Loading /usr/lib/xorg/modules/drivers/trident_drv.so
[ 1678.466] (II) Module trident: vendor="X.Org Foundation"
[ 1678.466] compiled for 1.17.1, module version = 1.3.7
[ 1678.466] Module class: X.Org Video Driver
[ 1678.466] ABI class: X.Org Video Driver, version 19.0
[ 1678.484] (II) LoadModule: "ati"
[ 1678.484] (II) Loading /usr/lib/xorg/modules/drivers/ati_drv.so
[ 1678.495] (II) Module ati: vendor="X.Org Foundation"
[ 1678.495] compiled for 1.17.1, module version = 7.5.0
[ 1678.495] Module class: X.Org Video Driver
[ 1678.495] ABI class: X.Org Video Driver, version 19.0
[ 1678.495] (II) LoadModule: "tdfx"
[ 1678.495] (II) Loading /usr/lib/xorg/modules/drivers/tdfx_drv.so
[ 1678.530] (II) Module tdfx: vendor="X.Org Foundation"
[ 1678.531] compiled for 1.17.1, module version = 1.4.6
[ 1678.531] Module class: X.Org Video Driver
[ 1678.531] ABI class: X.Org Video Driver, version 19.0
[ 1678.531] (II) LoadModule: "vmware"
[ 1678.531] (II) Loading /usr/lib/xorg/modules/drivers/vmware_drv.so
[ 1680.447] (II) Module vmware: vendor="X.Org Foundation"
[ 1680.447] compiled for 1.17.1, module version = 13.1.0
[ 1680.447] Module class: X.Org Video Driver
[ 1680.447] ABI class: X.Org Video Driver, version 19.0
[ 1680.447] (II) LoadModule: "cirrus"
[ 1680.448] (II) Loading /usr/lib/xorg/modules/drivers/cirrus_drv.so
[ 1680.601] (II) Module cirrus: vendor="X.Org Foundation"
[ 1680.601] compiled for 1.17.1, module version = 1.5.3
[ 1680.601] Module class: X.Org Video Driver
[ 1680.602] ABI class: X.Org Video Driver, version 19.0
[ 1680.602] (II) LoadModule: "r128"
[ 1680.602] (II) Loading /usr/lib/xorg/modules/drivers/r128_drv.so
[ 1680.660] (II) Module r128: vendor="X.Org Foundation"
[ 1680.660] compiled for 1.17.1, module version = 6.10.0
[ 1680.660] Module class: X.Org Video Driver
[ 1680.660] ABI class: X.Org Video Driver, version 19.0
[ 1680.660] (II) LoadModule: "mga"
[ 1680.660] (II) Loading /usr/lib/xorg/modules/drivers/mga_drv.so
[ 1680.723] (II) Module mga: vendor="X.Org Foundation"
[ 1680.723] compiled for 1.17.1, module version = 1.6.4
[ 1680.723] Module class: X.Org Video Driver
[ 1680.723] ABI class: X.Org Video Driver, version 19.0
[ 1680.723] (II) LoadModule: "sisusb"
[ 1680.723] (II) Loading /usr/lib/xorg/modules/drivers/sisusb_drv.so
[ 1680.755] (II) Module sisusb: vendor="X.Org Foundation"
[ 1680.755] compiled for 1.17.1, module version = 0.9.6
[ 1680.755] Module class: X.Org Video Driver
[ 1680.755] ABI class: X.Org Video Driver, version 19.0
[ 1680.755] (II) LoadModule: "qxl"
[ 1680.755] (II) Loading /usr/lib/xorg/modules/drivers/qxl_drv.so
[ 1680.833] (II) Module qxl: vendor="X.Org Foundation"
[ 1680.833] compiled for 1.17.1, module version = 0.1.4
[ 1680.833] Module class: X.Org Video Driver
[ 1680.833] ABI class: X.Org Video Driver, version 19.0
[ 1680.833] (II) LoadModule: "neomagic"
[ 1680.833] (II) Loading /usr/lib/xorg/modules/drivers/neomagic_drv.so
[ 1680.880] (II) Module neomagic: vendor="X.Org Foundation"
[ 1680.880] compiled for 1.17.1, module version = 1.2.9
[ 1680.880] Module class: X.Org Video Driver
[ 1680.880] ABI class: X.Org Video Driver, version 19.0
[ 1680.880] (II) LoadModule: "vesa"
[ 1680.880] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 1680.880] (II) Module vesa: vendor="X.Org Foundation"
[ 1680.880] compiled for 1.17.1, module version = 2.3.3
[ 1680.880] Module class: X.Org Video Driver
[ 1680.880] ABI class: X.Org Video Driver, version 19.0
[ 1680.880] (II) LoadModule: "fbdev"
[ 1680.880] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 1680.880] (II) Module fbdev: vendor="X.Org Foundation"
[ 1680.880] compiled for 1.17.1, module version = 0.4.4
[ 1680.880] Module class: X.Org Video Driver
[ 1680.880] ABI class: X.Org Video Driver, version 19.0
[ 1680.880] (II) LoadModule: "modesetting"
[ 1680.880] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 1680.881] (II) Module modesetting: vendor="X.Org Foundation"
[ 1680.881] compiled for 1.17.2, module version = 1.17.2
[ 1680.881] Module class: X.Org Video Driver
[ 1680.881] ABI class: X.Org Video Driver, version 19.0
[ 1680.881] (WW) Falling back to old probe method for siliconmotion
[ 1680.881] (EE)
[ 1680.881] (EE) Backtrace:
[ 1680.882] (EE) 0: Xorg (xorg_backtrace+0x4e) [0x561442a5685e]
[ 1680.883] (EE) 1: Xorg (0x5614428a3000+0x1b7aa9) [0x561442a5aaa9]
[ 1680.884] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6
(0x7fabfb0e4000+0x35180) [0x7fabfb119180]
[ 1680.884] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so
(0x7fabf8446000+0x150ba) [0x7fabf845b0ba]
[ 1680.885] (EE) 4: Xorg (0x5614428a3000+0xb906b) [0x56144295c06b]
[ 1680.886] (EE) 5: Xorg (0x5614428a3000+0xb91d0) [0x56144295c1d0]
[ 1680.887] (EE) 6: Xorg (0x5614428a3000+0xb992a) [0x56144295c92a]
[ 1680.887] (EE) 7: Xorg (xf86CallDriverProbe+0x17) [0x56144292f427]
[ 1680.888] (EE) 8: Xorg (DoConfigure+0xd7) [0x56144292e317]
[ 1680.889] (EE) 9: Xorg (InitOutput+0x126d) [0x56144293e89d]
[ 1680.889] (EE) 10: Xorg (0x5614428a3000+0x5bfda) [0x5614428fefda]
[ 1680.890] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6
(__libc_start_main+0xf5) [0x7fabfb105b45]
[ 1680.891] (EE) 12: Xorg (0x5614428a3000+0x465be) [0x5614428e95be]
[ 1680.891] (EE)
[ 1680.895] (EE) Segmentation fault at address 0x30
[ 1680.896] (EE)
Fatal server error:
[ 1680.897] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 1680.898] (EE)
[ 1680.899] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 1680.902] (EE) Please also check the log file at
"/var/log/Xorg.0.log" for additional information.
[ 1680.903] (EE)
