[Nouveau] [Bug 79912] New: Nouveau unuseable with 3 monitors and a geforce GTX 670

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79912

          Priority: medium
            Bug ID: 79912
          Assignee: nouveau at lists.freedesktop.org
           Summary: Nouveau unuseable with 3 monitors and a geforce GTX
                    670
        QA Contact: xorg-team at lists.x.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: tiziano.bacocco at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

If i connect a third monitor on HDMI , on that one i get a purple vertical line
on the left , DVI-D one does not work, and framerate of gnome-shell is very
very low

On the kernel logs at boot i get 

[   25.163082] WARNING: CPU: 1 PID: 1188 at drivers/gpu/drm/ttm/ttm_bo_vm.c:269
ttm_bo_vm_open+0x52/0x80 [ttm]()
[   25.163084] Modules linked in: ccm xt_CHECKSUM iptable_mangle ipt_MASQUERADE
iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
nf_conntrack tun bnep bridge stp llc snd_hda_codec_hdmi x86_pkg_temp_thermal
coretemp snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel kvm_intel
snd_hda_codec snd_hwdep arc4 ath9k ath9k_common ath9k_hw snd_seq ath
ir_lirc_codec ir_mce_kbd_decoder lirc_dev ir_sony_decoder ir_nec_decoder
ir_sanyo_decoder ir_rc6_decoder ir_jvc_decoder mac80211 ir_rc5_decoder nouveau
r820t kvm snd_seq_device snd_pcm iTCO_wdt rtl2832 cfg80211 crct10dif_pclmul
iTCO_vendor_support dvb_usb_rtl28xxu rtl2830 i2c_algo_bit ttm crc32_pclmul
btusb crc32c_intel dvb_usb_v2 eeepc_wmi asus_wmi snd_timer drm_kms_helper
sparse_keymap snd drm ghash_clmulni_intel dvb_core soundcore
[   25.163138]  bluetooth i2c_i801 radio_ma901 tpm_tis tpm_infineon joydev
videodev mei_me 6lowpan_iphc rfkill rc_core media i2c_core serio_raw tpm
lpc_ich mei shpchp mfd_core microcode nfsd auth_rpcgss nfs_acl lockd sunrpc
raid0 mxm_wmi e1000e ptp pps_core video wmi
[   25.163164] CPU: 1 PID: 1188 Comm: Xorg Tainted: G        W   
3.14.5-200.fc20.x86_64 #1
[   25.163166] Hardware name: ASUS All Series/Z87-PRO, BIOS 0903 05/06/2013
[   25.163168]  0000000000000000 00000000c1415f90 ffff88030476bd90
ffffffff816efa42
[   25.163173]  0000000000000000 ffff88030476bdc8 ffffffff8108a1cd
ffff880309ca6000
[   25.163179]  ffff880309d23ac8 ffff88030bd69f18 0000000000000000
0000000000000000
[   25.163183] Call Trace:
[   25.163189]  [<ffffffff816efa42>] dump_stack+0x45/0x56
[   25.163194]  [<ffffffff8108a1cd>] warn_slowpath_common+0x7d/0xa0
[   25.163199]  [<ffffffff8108a2fa>] warn_slowpath_null+0x1a/0x20
[   25.163209]  [<ffffffffa034b132>] ttm_bo_vm_open+0x52/0x80 [ttm]
[   25.163214]  [<ffffffff81088f17>] copy_process.part.26+0x18f7/0x1b90
[   25.163219]  [<ffffffff81089373>] do_fork+0xc3/0x370
[   25.163225]  [<ffffffff810896a6>] SyS_clone+0x16/0x20
[   25.163229]  [<ffffffff81700189>] stub_clone+0x69/0x90
[   25.163234]  [<ffffffff816ffe29>] ? system_call_fastpath+0x16/0x1b
[   25.163237] ---[ end trace da86bd3f343ad454 ]---
[   25.163241] ------------[ cut here ]------------


and when using it thousands of lines with
[  342.347721] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  342.360259] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  342.373450] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  342.386710] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  342.400035] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  342.412854] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  342.426119] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d
[  343.290435] nouveau E[   PDISP][0000:01:00.0] chid 0 mthd 0x0080 data
0x00000000 0x10005080 0x0000400d

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