Comment 15 for bug 1438708

Alberto,

Appologies for the delay in responding. Good news - I've been able to boot linux 4.0-rc6 and the system is now stable.

I used the package linux-image-4.0.0-040000rc6-generic for Vivid from the from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-rc6-vivid/

There are still a bunch of nouveau errors (below) visible in dmesg but the system does NOT crash anymore

[ 0.695552] nouveau [ DEVICE][0000:01:00.0] BOOT0 : 0x0e4190a2
[ 0.695556] nouveau [ DEVICE][0000:01:00.0] Chipset: GK104 (NVE4)
[ 0.695558] nouveau [ DEVICE][0000:01:00.0] Family : NVE0
[ 0.762806] nouveau [ VBIOS][0000:01:00.0] using image from PROM
[ 0.762895] nouveau [ VBIOS][0000:01:00.0] BIT signature found
[ 0.762899] nouveau [ VBIOS][0000:01:00.0] version 80.04.f4.00.01
[ 0.763651] nouveau [ DEVINIT][0000:01:00.0] adaptor not initialised
[ 0.763681] nouveau [ VBIOS][0000:01:00.0] running init tables
[ 1.025922] nouveau [ PMC][0000:01:00.0] MSI interrupts enabled
[ 1.025982] nouveau [ PFB][0000:01:00.0] RAM type: GDDR5
[ 1.025984] nouveau [ PFB][0000:01:00.0] RAM size: 3072 MiB
[ 1.025987] nouveau [ PFB][0000:01:00.0] ZCOMP: 0 tags
[ 1.028427] nouveau [ VOLT][0000:01:00.0] GPU voltage: 600000uv
[ 1.076762] nouveau [ PTHERM][0000:01:00.0] FAN control: none / external
[ 1.076773] nouveau [ PTHERM][0000:01:00.0] fan management: automatic
[ 1.076789] nouveau [ PTHERM][0000:01:00.0] internal sensor: yes
[ 1.076829] nouveau [ CLK][0000:01:00.0] 07: core 324-405 MHz memory 648 MHz
[ 1.076865] nouveau [ CLK][0000:01:00.0] 0a: core 405-967 MHz memory 1620 MHz
[ 1.076910] nouveau [ CLK][0000:01:00.0] 0e: core 405-967 MHz memory 4000 MHz
[ 1.076963] nouveau [ CLK][0000:01:00.0] 0f: core 405-967 MHz memory 5000 MHz
[ 1.077034] nouveau [ CLK][0000:01:00.0] --: core 324 MHz memory 648 MHz
[ 1.110733] nouveau E[ PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x500c30 [ IBUS ]
[ 1.110882] nouveau [ DRM] VRAM: 3072 MiB
[ 1.110884] nouveau [ DRM] GART: 1048576 MiB
[ 1.110888] nouveau [ DRM] TMDS table version 2.0
[ 1.110891] nouveau [ DRM] DCB version 4.0
[ 1.110893] nouveau [ DRM] DCB conn 08: 00020846
[ 1.110896] nouveau [ DRM] DCB conn 09: 00000900
[ 1.117043] nouveau [ DRM] MM: using COPY for buffer copies
[ 1.117049] [drm] Initialized nouveau 1.2.1 20120801 for 0000:01:00.0 on minor 0
[ 11.474194] nouveau E[ PGR][0000:01:00.0] HUB_INIT timed out
[ 11.474201] nouveau E[ PGR][0000:01:00.0] 409000 - done 0x00000240
[ 11.474206] nouveau E[ PGR][0000:01:00.0] 409000 - stat 0x00000000 0x00000000 0x00000000 0x00000000
[ 11.474210] nouveau E[ PGR][0000:01:00.0] 409000 - stat 0x00000000 0x00000000 0x00000006 0x00000000
[ 11.474213] nouveau E[ PGR][0000:01:00.0] 502000 - done 0x00000340
[ 11.474218] nouveau E[ PGR][0000:01:00.0] 502000 - stat 0x80000000 0x00006500 0x00000000 0x00000000
[ 11.474224] nouveau E[ PGR][0000:01:00.0] 502000 - stat 0x00000000 0x00000000 0x00000002 0x00000000
[ 11.474227] nouveau E[ PGR][0000:01:00.0] 50a000 - done 0x00000340
[ 11.474233] nouveau E[ PGR][0000:01:00.0] 50a000 - stat 0x80000000 0x00008e00 0x00000000 0x00000000
[ 11.474239] nouveau E[ PGR][0000:01:00.0] 50a000 - stat 0x00000000 0x00000000 0x00000002 0x00000000
[ 11.474241] nouveau E[ PGR][0000:01:00.0] 512000 - done 0x00000340
[ 11.474247] nouveau E[ PGR][0000:01:00.0] 512000 - stat 0x80000000 0x00008e00 0x00000000 0x00000000
[ 11.474253] nouveau E[ PGR][0000:01:00.0] 512000 - stat 0x00000000 0x00000000 0x00000002 0x00000000
[ 11.474255] nouveau E[ PGR][0000:01:00.0] 51a000 - done 0x00000300
[ 11.474261] nouveau E[ PGR][0000:01:00.0] 51a000 - stat 0x00000000 0x00020d00 0x00000000 0x00000000
[ 11.474267] nouveau E[ PGR][0000:01:00.0] 51a000 - stat 0x00000000 0x00000000 0x00000000 0x00000000
[ 11.474269] nouveau E[ PGR][0000:01:00.0] init failed, -16
[ 35.833502] nouveau E[ DRM] failed to idle channel 0xcccc0000 [DRM]
[ 35.878812] pci_pm_runtime_suspend(): nouveau_pmops_runtime_suspend+0x0/0x110 [nouveau] returns -16