I am having the same problem with my 12.04.2 install. I am using a G84 Geforce 8400 GS.
I don't have a menu.lst in my grub dir, the work around did not work. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/973610 Title: Flickering Screen - X Display Problem Nouveau DRM [12.04 Beta2] Status in “xserver-xorg-video-nouveau” package in Ubuntu: Confirmed Bug description: Running the current Ubuntu 12.04 LTS Beta2 as a live test from dvd (x64) - default boot settings, nothing changed, I encountered the following graphics problem: In X-Window-Mode on the Unity Desktop my screen starts to flicker continuous at intervals of about 10 seconds! There are a lot of error messages from drm/nouveau, so it's obviously a problem with the free graphics driver for nvidia cards, in my case it's a 'GTX 560 Ti 448 Limited'. See debug output and hardware details below... System settings => Displays says my Monitor is unknown and configuration is set to 1024x768 (4:3). My LCD Screen (an older Medion 19") normally wants to work at 1280x1024 - unfortunately I cannot set a higher resolution in that menu... I tried Detect Display but that does not find or change anything. My Hardware: CPU: AMD FX-4100 4x3.60 Ghz Mainboard: ASRock Extreme3 R2.0, AMD 870, AM3+, Dual Channel DDR3 ATX RAM: DDR3-1333 8 GB G.Skill DIMM 2x4096 Graphics Adapter PCI-Express: Gainward Nvidia Geforce GTX 560 Ti 448 Cores Limited Edition, 1280 MB DEBUG Details: 'dmesg' and syslog spam these error messages: [ 1549.031468] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1549.076283] [drm] nouveau 0000:01:00.0: unknown i2c port 55 [ 1549.076314] [drm] nouveau 0000:01:00.0: unknown i2c port 55 [ 1549.076329] [drm] nouveau 0000:01:00.0: unknown i2c port 54 [ 1549.076341] [drm] nouveau 0000:01:00.0: unknown i2c port 54 [ 1558.912113] [drm] nouveau 0000:01:00.0: unknown i2c port 48 [ 1558.912121] [drm] nouveau 0000:01:00.0: unknown i2c port 48 [ 1558.912131] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1558.912139] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1558.912162] [drm] nouveau 0000:01:00.0: unknown i2c port 55 [ 1558.912171] [drm] nouveau 0000:01:00.0: unknown i2c port 54 [ 1558.916417] [drm] nouveau 0000:01:00.0: unknown i2c port 48 [ 1558.916426] [drm] nouveau 0000:01:00.0: unknown i2c port 48 [ 1558.974140] [drm] nouveau 0000:01:00.0: unknown i2c port 55 [ 1558.974200] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1558.974211] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1559.018880] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1559.018886] [drm] nouveau 0000:01:00.0: unknown i2c port 56 [ 1559.063585] [drm] nouveau 0000:01:00.0: unknown i2c port 55 [ 1559.063606] [drm] nouveau 0000:01:00.0: unknown i2c port 55 [ 1559.063614] [drm] nouveau 0000:01:00.0: unknown i2c port 54 [ 1559.063628] [drm] nouveau 0000:01:00.0: unknown i2c port 54 [ 1559.063648] [drm] nouveau 0000:01:00.0: unknown i2c port 48 [ 1559.063656] [drm] nouveau 0000:01:00.0: unknown i2c port 48 ... lsmod: Module Size Used by parport_pc 32866 0 ppdev 17113 0 dm_crypt 23125 0 lp 17799 0 parport 46562 3 parport_pc,ppdev,lp snd_hda_codec_hdmi 32474 4 snd_hda_codec_realtek 223867 1 snd_hda_intel 33773 5 snd_seq_midi 13324 0 snd_hda_codec 127706 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel snd_hwdep 13668 1 snd_hda_codec snd_rawmidi 30748 1 snd_seq_midi snd_pcm 97188 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec snd_seq_midi_event 14899 1 snd_seq_midi snd_seq 61896 2 snd_seq_midi,snd_seq_midi_event sp5100_tco 13791 0 snd_timer 29990 2 snd_pcm,snd_seq snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq joydev 17693 0 edac_core 53746 0 k10temp 13166 0 bnep 18281 2 i2c_piix4 13301 0 edac_mce_amd 23709 0 rfcomm 47604 0 snd 78855 20 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_rawmidi,snd_pcm,snd_seq,snd_timer,snd_seq_device fam15h_power 13032 0 dm_multipath 23230 0 mac_hid 13253 0 bluetooth 180104 10 bnep,rfcomm soundcore 15091 1 snd snd_page_alloc 18529 2 snd_hda_intel,snd_pcm squashfs 36799 1 overlayfs 28305 1 nls_utf8 12557 1 isofs 40257 1 nls_iso8859_1 12713 0 nls_cp437 16991 0 vfat 17585 0 fat 61512 1 vfat dm_raid45 78155 0 xor 12894 1 dm_raid45 dm_mirror 22203 0 dm_region_hash 20918 1 dm_mirror dm_log 18564 3 dm_raid45,dm_mirror,dm_region_hash btrfs 652957 0 zlib_deflate 27139 1 btrfs libcrc32c 12644 1 btrfs firewire_ohci 41000 0 firewire_core 63558 1 firewire_ohci usbhid 47199 0 crc_itu_t 12707 1 firewire_core hid 99559 1 usbhid nouveau 774586 3 pata_atiixp 13204 0 ttm 76949 1 nouveau atl1c 41717 0 drm_kms_helper 42489 1 nouveau drm 241873 5 nouveau,ttm,drm_kms_helper i2c_algo_bit 13423 1 nouveau mxm_wmi 12979 1 nouveau wmi 19256 1 mxm_wmi video 19411 1 nouveau some more syslog-output: Apr 4 17:51:27 ubuntu kernel: [ 3.117940] vgaarb: device added: PCI:0000:01:00.0,decodes=io+mem,owns=io+mem,locks=none Apr 4 17:51:27 ubuntu kernel: [ 3.117940] vgaarb: loaded Apr 4 17:51:27 ubuntu kernel: [ 3.117940] vgaarb: bridge control possible 0000:01:00.0 Apr 4 17:51:27 ubuntu kernel: [ 3.117940] i2c-core: driver [aat2870] using legacy suspend method Apr 4 17:51:27 ubuntu kernel: [ 3.117940] i2c-core: driver [aat2870] using legacy resume method Apr 4 17:51:27 ubuntu kernel: [ 5.737737] VGA switcheroo: detected Optimus DSM method \ handle Apr 4 17:51:27 ubuntu kernel: [ 5.737762] nouveau 0000:01:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 Apr 4 17:51:27 ubuntu kernel: [ 5.737767] nouveau 0000:01:00.0: setting latency timer to 64 Apr 4 17:51:27 ubuntu kernel: [ 5.739525] [drm] nouveau 0000:01:00.0: Detected an NVc0 generation card (0x0c8380a1) Apr 4 17:51:27 ubuntu kernel: [ 5.746117] [drm] nouveau 0000:01:00.0: Attempting to load BIOS image from PRAMIN Apr 4 17:51:27 ubuntu kernel: [ 5.861375] [drm] nouveau 0000:01:00.0: ... appears to be valid Apr 4 17:51:27 ubuntu kernel: [ 5.861378] [drm] nouveau 0000:01:00.0: BIT BIOS found Apr 4 17:51:27 ubuntu kernel: [ 5.861381] [drm] nouveau 0000:01:00.0: Bios version 70.10.61.00 Apr 4 17:51:27 ubuntu kernel: [ 5.861384] [drm] nouveau 0000:01:00.0: TMDS table version 2.0 Apr 4 17:51:27 ubuntu kernel: [ 5.861386] [drm] nouveau 0000:01:00.0: Found Display Configuration Block version 4.0 Apr 4 17:51:27 ubuntu kernel: [ 5.861389] [drm] nouveau 0000:01:00.0: Raw DCB entry 0: 02000300 00000000 Apr 4 17:51:27 ubuntu kernel: [ 5.861392] [drm] nouveau 0000:01:00.0: Raw DCB entry 1: 01000302 00020030 Apr 4 17:51:27 ubuntu kernel: [ 5.861393] [drm] nouveau 0000:01:00.0: Raw DCB entry 2: 04011380 00000000 Apr 4 17:51:27 ubuntu kernel: [ 5.861395] [drm] nouveau 0000:01:00.0: Raw DCB entry 3: 08011382 00020030 Apr 4 17:51:27 ubuntu kernel: [ 5.861397] [drm] nouveau 0000:01:00.0: Raw DCB entry 4: 040223b6 0f220010 Apr 4 17:51:27 ubuntu kernel: [ 5.861399] [drm] nouveau 0000:01:00.0: Raw DCB entry 5: 04022372 0f220010 Apr 4 17:51:27 ubuntu kernel: [ 5.861401] [drm] nouveau 0000:01:00.0: Raw DCB entry 6: 02033362 00020010 Apr 4 17:51:27 ubuntu kernel: [ 5.861404] [drm] nouveau 0000:01:00.0: DCB connector table: VHER 0x40 5 16 4 Apr 4 17:51:27 ubuntu kernel: [ 5.861406] [drm] nouveau 0000:01:00.0: 0: 0x00001030: type 0x30 idx 0 tag 0x07 Apr 4 17:51:27 ubuntu kernel: [ 5.861408] [drm] nouveau 0000:01:00.0: 1: 0x00010130: type 0x30 idx 1 tag 0x51 Apr 4 17:51:27 ubuntu kernel: [ 5.861411] [drm] nouveau 0000:01:00.0: 2: 0x00220246: type 0x46 idx 2 tag 0x52 Apr 4 17:51:27 ubuntu kernel: [ 5.861413] [drm] nouveau 0000:01:00.0: 3: 0x00002361: type 0x61 idx 3 tag 0x08 Apr 4 17:51:27 ubuntu kernel: [ 5.861417] [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 0 at offset 0x6C74 Apr 4 17:51:27 ubuntu kernel: [ 5.872551] atl1c 0000:03:00.0: version 1.0.1.0-NAPI Apr 4 17:51:27 ubuntu kernel: [ 5.881430] [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 1 at offset 0x7336 Apr 4 17:51:27 ubuntu kernel: [ 5.885685] [drm] nouveau 0000:01:00.0: unknown i2c port 51 Apr 4 17:51:27 ubuntu kernel: [ 5.885688] [drm] nouveau 0000:01:00.0: 0x85F3: Failed parsing init table opcode: INIT_I2C_LONG_IF -19 Apr 4 17:51:27 ubuntu kernel: [ 5.885690] [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 2 at offset 0x882C Apr 4 17:51:27 ubuntu kernel: [ 5.885692] [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 3 at offset 0x8836 Apr 4 17:51:27 ubuntu kernel: [ 5.885772] [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 4 at offset 0x8AAA Apr 4 17:51:27 ubuntu kernel: [ 5.885774] [drm] nouveau 0000:01:00.0: Parsing VBIOS init table at offset 0x8B0F Apr 4 17:51:27 ubuntu kernel: [ 5.905622] [drm] nouveau 0000:01:00.0: 0x8B1C: Condition still not met after 20ms, skipping following opcodes Apr 4 17:51:27 ubuntu kernel: [ 5.905745] [drm] nouveau 0000:01:00.0: unknown i2c port 51 Apr 4 17:51:27 ubuntu kernel: [ 5.905748] [drm] nouveau 0000:01:00.0: 0 available performance level(s) Apr 4 17:51:27 ubuntu kernel: [ 5.905849] [drm] nouveau 0000:01:00.0: c: core 50MHz shader 101MHz memory 135MHz voltage 913mV Apr 4 17:51:27 ubuntu kernel: [ 5.908155] [TTM] Zone kernel: Available graphics memory: 4078994 kiB. Apr 4 17:51:27 ubuntu kernel: [ 5.908157] [TTM] Zone dma32: Available graphics memory: 2097152 kiB. Apr 4 17:51:27 ubuntu kernel: [ 5.908159] [TTM] Initializing pool allocator. Apr 4 17:51:27 ubuntu kernel: [ 5.908170] [drm] nouveau 0000:01:00.0: Detected 1280MiB VRAM Apr 4 17:51:27 ubuntu kernel: [ 5.908176] mtrr: type mismatch for f0000000,8000000 old: write-back new: write-combining Apr 4 17:51:27 ubuntu kernel: [ 5.908191] [drm] nouveau 0000:01:00.0: 512 MiB GART (aperture) Apr 4 17:51:27 ubuntu kernel: [ 5.916760] firewire_ohci 0000:05:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 Apr 4 17:51:27 ubuntu kernel: [ 5.916767] firewire_ohci 0000:05:00.0: setting latency timer to 64 Apr 4 17:51:27 ubuntu kernel: [ 5.984062] firewire_ohci: Added fw-ohci device 0000:05:00.0, OHCI v1.10, 4 IR + 8 IT contexts, quirks 0x11 Apr 4 17:51:27 ubuntu kernel: [ 6.060957] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). Apr 4 17:51:27 ubuntu kernel: [ 6.060960] [drm] No driver support for vblank timestamp query. Apr 4 17:51:27 ubuntu kernel: [ 6.060970] [drm] nouveau 0000:01:00.0: unknown i2c port 48 Apr 4 17:51:27 ubuntu kernel: [ 6.060972] [drm] nouveau 0000:01:00.0: unknown i2c port 48 Apr 4 17:51:27 ubuntu kernel: [ 6.117915] [drm] nouveau 0000:01:00.0: unknown i2c port 56 Apr 4 17:51:27 ubuntu kernel: [ 6.117921] [drm] nouveau 0000:01:00.0: unknown i2c port 56 Apr 4 17:51:27 ubuntu kernel: [ 6.162648] [drm] nouveau 0000:01:00.0: unknown i2c port 55 Apr 4 17:51:27 ubuntu kernel: [ 6.162655] [drm] nouveau 0000:01:00.0: unknown i2c port 54 Apr 4 17:51:27 ubuntu kernel: [ 6.163358] [drm] nouveau 0000:01:00.0: allocated 1024x768 fb: 0x1e0000, bo ffff88020fbbf800 Apr 4 17:51:27 ubuntu kernel: [ 6.163407] fbcon: nouveaufb (fb0) is primary device Apr 4 17:51:27 ubuntu kernel: [ 6.165639] [drm] nouveau 0000:01:00.0: No native mode, forcing panel scaling Apr 4 17:51:27 ubuntu kernel: [ 6.207370] Console: switching to colour frame buffer device 128x48 Apr 4 17:51:27 ubuntu kernel: [ 6.211810] fb0: nouveaufb frame buffer device Apr 4 17:51:27 ubuntu kernel: [ 6.211812] drm: registered panic notifier Apr 4 17:51:27 ubuntu kernel: [ 6.211816] [drm] Initialized nouveau 0.0.16 20090420 for 0000:01:00.0 on minor 0 Apr 4 17:51:27 ubuntu kernel: [ 16.224106] [drm] nouveau 0000:01:00.0: unknow n i2c port 48 Apr 4 17:51:27 ubuntu kernel: [ 16.224112] [drm] nouveau 0000:01:00.0: unknow n i2c port 48 Apr 4 17:51:27 ubuntu kernel: [ 16.224123] [drm] nouveau 0000:01:00.0: unknow n i2c port 56 Apr 4 17:51:27 ubuntu kernel: [ 16.224131] [drm] nouveau 0000:01:00.0: unknow n i2c port 56 ... 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