[Bug 581549] [NEW] nouveau driver hangs system

[Mike Hayward]

Public bug reported:

Binary package hint: linux-image-2.6.32-21-server

May 16 12:13:01 atom40 kernel: [    4.369025] BUG: unable to handle
kernel NULL pointer dereference at (null)

I have 13 identical systems.  I've upgraded to 10.04 LTS Server and it
now loads the nouveau driver by default.  There is roughly a 10% chance
that a system will fail to boot properly, and frequently I find that the
problem is related to the nouveau driver and so I have black listed it
since these are server machines and I don't even use the video.  Not
sure why this driver is even selected to load by default for a server
config.  Typically it locks up the system so hard it can't log to the
filesystem, but today one system caught a null pointer dereference.

May 16 12:13:01 atom40 kernel: [    4.369058] PGD d8e83067 PUD d7ad8067 PMD 0
May 16 12:13:01 atom40 kernel: [    4.369085] CPU 2
May 16 12:13:01 atom40 kernel: [    4.369089] Modules linked in: fbcon(+) tileblit font bitblit softcursor vga16fb vgastate arc4 snd_hda_intel(+) snd_hda_codec snd_hwdep snd_pcm nouveau snd_timer ttm ath9k drm_kms_helper snd drm i2c_algo_bit soundcore psmouse serio_raw mac80211 snd_page_alloc ath cfg80211 led_class i2c_nforce2 shpchp lp parport ahci forcedeth
May 16 12:13:01 atom40 kernel: [    4.369149] Pid: 661, comm: modprobe Not tainted 2.6.32-21-server #32-Ubuntu To Be Filled By O.E.M.
May 16 12:13:01 atom40 kernel: [    4.369157] RIP: 0010:[<ffffffffa0305690>]  [<ffffffffa0305690>] save_vga_text+0x290/0xa10 [vgastate]
May 16 12:13:01 atom40 kernel: [    4.369173] RSP: 0018:ffff8800d8b51d38  EFLAGS: 00010283
May 16 12:13:01 atom40 kernel: [    4.369180] RAX: 0000000000000500 RBX: ffff8800d4493c38 RCX: ffff8800000a8000
May 16 12:13:01 atom40 kernel: [    4.369187] RDX: 0000000000000000 RSI: ffff8800000a0000 RDI: ffff8800d4493c38
May 16 12:13:01 atom40 kernel: [    4.369196] RBP: ffff8800d8b51d88 R08: ffff8800d7af1900 R09: ffff8800d8b51c84
May 16 12:13:01 atom40 kernel: [    4.369203] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8800d9f8f900
May 16 12:13:01 atom40 kernel: [    4.369210] R13: ffff8800000a0000 R14: ffff8800000a0001 R15: 0000000000000000
May 16 12:13:01 atom40 kernel: [    4.369220] FS:  00007fbdf3588700(0000) GS:ffff880001d00000(0000) knlGS:0000000000000000
May 16 12:13:01 atom40 kernel: [    4.369228] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May 16 12:13:01 atom40 kernel: [    4.369235] CR2: 0000000000000000 CR3: 00000000d75a4000 CR4: 00000000000006e0
May 16 12:13:01 atom40 kernel: [    4.369242] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May 16 12:13:01 atom40 kernel: [    4.369250] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
May 16 12:13:01 atom40 kernel: [    4.369259] Process modprobe (pid: 661, threadinfo ffff8800d8b50000, task ffff8800379496f0)
May 16 12:13:01 atom40 kernel: [    4.369269]  ffff8800d8b51d78 ffffffff8111fb22 00000000000000d2 0002030e10005f75
May 16 12:13:01 atom40 kernel: [    4.369281] <0> ffff8800d4493c38 ffff8800d4493c38 ffff8800d919db40 ffff8800000a0000
May 16 12:13:01 atom40 kernel: [    4.369292] <0> 0000000000000000 ffffc90006090000 ffff8800d8b51dd8 ffffffffa0305f8a
May 16 12:13:01 atom40 kernel: [    4.369321]  [<ffffffff8111fb22>] ? __vmalloc_node+0xa2/0xb0
May 16 12:13:01 atom40 kernel: [    4.369334]  [<ffffffffa0305f8a>] save_vga+0x17a/0x320 [vgastate]
May 16 12:13:01 atom40 kernel: [    4.369349]  [<ffffffffa030cd8c>] vga16fb_open+0x3c/0x50 [vga16fb]
May 16 12:13:01 atom40 kernel: [    4.369365]  [<ffffffffa03325c3>] fbcon_startup+0xf3/0x360 [fbcon]
May 16 12:13:01 atom40 kernel: [    4.369379]  [<ffffffff81089e3e>] ? down+0x2e/0x50
May 16 12:13:01 atom40 kernel: [    4.369392]  [<ffffffff8133df9f>] register_con_driver+0xdf/0x1d0
May 16 12:13:01 atom40 kernel: [    4.369405]  [<ffffffff8133e962>] take_over_console+0x32/0x70
May 16 12:13:01 atom40 kernel: [    4.369420]  [<ffffffffa0331ea6>] fbcon_takeover+0x66/0xb0 [fbcon]
May 16 12:13:01 atom40 kernel: [    4.369434]  [<ffffffffa033c11a>] fb_console_init+0x11a/0x121 [fbcon]
May 16 12:13:01 atom40 kernel: [    4.369448]  [<ffffffffa033c000>] ? fb_console_init+0x0/0x121 [fbcon]
May 16 12:13:01 atom40 kernel: [    4.369462]  [<ffffffff8100a04c>] do_one_initcall+0x3c/0x1a0
May 16 12:13:01 atom40 kernel: [    4.369476]  [<ffffffff810a12af>] sys_init_module+0xdf/0x260
May 16 12:13:01 atom40 kernel: [    4.369489]  [<ffffffff810131b2>] system_call_fastpath+0x16/0x1b
May 16 12:13:01 atom40 kernel: [    4.369588]  RSP <ffff8800d8b51d38>
May 16 12:13:01 atom40 kernel: [    4.369601] ---[ end trace c5c05019b12420ee ]---

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
nouveau driver hangs system
https://bugs.launchpad.net/bugs/581549
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