Dell Latitude E6510, CONFIG_DRM_NOUVEAU, 64-bit Fedora 17 user-space, Xorg drivers, and
01:00.0 VGA compatible controller: nVidia Corporation GT218 [NVS 3100M] (rev a2).
With 3.11 X starts fine, with 3.12-rc1 it fails with the following in Xorg.0.log:
... [ 56.819] (II) Loading /usr/lib64/xorg/modules/drivers/nouveau_drv.so [ 56.842] (II) Module nouveau: vendor="X.Org Foundation" [ 56.842] compiled for 1.12.2, module version = 0.0.16 [ 56.842] Module class: X.Org Video Driver [ 56.842] ABI class: X.Org Video Driver, version 12.0 [ 56.842] (II) NOUVEAU driver [ 56.842] (II) NOUVEAU driver for NVIDIA chipset families : [ 56.842] RIVA TNT (NV04) [ 56.842] RIVA TNT2 (NV05) [ 56.842] GeForce 256 (NV10) [ 56.842] GeForce 2 (NV11, NV15) [ 56.842] GeForce 4MX (NV17, NV18) [ 56.842] GeForce 3 (NV20) [ 56.842] GeForce 4Ti (NV25, NV28) [ 56.842] GeForce FX (NV3x) [ 56.842] GeForce 6 (NV4x) [ 56.842] GeForce 7 (G7x) [ 56.842] GeForce 8 (G8x) [ 56.842] GeForce GTX 200 (NVA0) [ 56.842] GeForce GTX 400 (NVC0) [ 56.842] (--) using VT number 7
[ 56.845] drmOpenDevice: node name is /dev/dri/card0 [ 56.845] drmOpenDevice: open result is 9, (OK) [ 56.845] drmOpenByBusid: Searching for BusID pci:0000:01:00.0 [ 56.845] drmOpenDevice: node name is /dev/dri/card0 [ 56.845] drmOpenDevice: open result is 9, (OK) [ 56.845] drmOpenByBusid: drmOpenMinor returns 9 [ 56.845] drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0 [ 56.845] (EE) [drm] failed to open device [ 56.845] (EE) No devices detected.
With 3.11 one instead sees:
... [ 33.879] drmOpenByBusid: drmOpenMinor returns 9 [ 33.879] drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0 [ 33.879] (II) [drm] nouveau interface version: 1.1.1 [ 33.879] (II) Loading sub module "dri" ...
There are no messages in the kernel's log that indicate any problem.
stracing xinit shows:
964 open("/dev/dri/card0", O_RDWR) = 9 964 write(0, "[ 1120.365] ", 13) = 13 964 write(0, "drmOpenDevice: open result is 9,"..., 38) = 38 964 write(0, "[ 1120.365] ", 13) = 13 964 write(0, "drmOpenByBusid: drmOpenMinor ret"..., 39) = 39 964 ioctl(9, 0xc0106407, 0x7fffda0d4800) = 0 964 ioctl(9, 0xc0106401, 0x7fffda0d4800) = 0 964 ioctl(9, 0xc0106401, 0x7fffda0d4800) = 0 964 write(0, "[ 1120.365] ", 13) = 13 964 write(0, "drmOpenByBusid: drmGetBusid repo"..., 53) = 53 964 ioctl(9, 0xc0086420, 0x7fffda0d4870) = -1 EINVAL (Invalid argument) 964 fstat(9, {st_dev=makedev(0, 5), st_ino=2348, st_mode=S_IFCHR|0660, st_nlink=1, st_uid=0, st_gid=39, st_blksize=4096, st_blocks=0, st_rdev=makedev(226, 0), st_atime=2013/09/17-11:25:35, st_mtime=2013/09/17-11:25:35, st_ctime=2013/09/17-11:43:58}) = 0 964 fstat(9, {st_dev=makedev(0, 5), st_ino=2348, st_mode=S_IFCHR|0660, st_nlink=1, st_uid=0, st_gid=39, st_blksize=4096, st_blocks=0, st_rdev=makedev(226, 0), st_atime=2013/09/17-11:25:35, st_mtime=2013/09/17-11:25:35, st_ctime=2013/09/17-11:43:58}) = 0 964 close(9) = 0 964 write(0, "[ 1120.366] ", 13) = 13 964 write(0, "(EE) [drm] failed to open device"..., 33) = 33
So it looke like that ioctl 0xc0086420 is the culprit.
Any ideas? I may have time to try a bisection tomorrow.