screensaver freezes system totally

[NoOp]

On 07/13/2010 01:01 AM, pete wrote:
...
> Hi All,
> 
> Sorry about the delay!
> 
> I have pasted into paste bin the logs links below.
> 
> The bit that caught my eye is from kern log:
> 
> -desktop kernel: [21195.790356] ata1.00: configured for PIO0
> Jul 12 17:04:50 steve-desktop kernel: [21195.801312] ata1.01: configured 
> for PIO0
> Jul 12 17:04:50 steve-desktop kernel: [21195.805287] ata1: EH complete
> Jul 12 17:05:00 steve-desktop kernel: [21205.331247] BUG: soft lockup - 
> CPU#1 stuck for 61s! [compiz:1449]
> Jul 12 17:05:00 steve-desktop kernel: [21205.340013] Modules linked in: 
> nls_iso8859_1 nls_cp437 vfat fat xt_limit xt_tcpudp ipt_LOG 
> ipt_MASQUERADE xt_DSCP ipt_REJECT nf_conntrack_irc nf_conntrack_ftp 
> xt_state rfcomm sco bridge stp bnep l2cap binfmt_misc ppdev 
> snd_hda_codec_nvhdmi snd_usb_audio snd_usb_lib gspca_stv06xx 
> snd_hda_codec_realtek iptable_nat nf_nat nf_conntrack_ipv4 joydev 
> snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul 
> nf_conntrack nf_defrag_ipv4 snd_emu10k1 snd_ac97_codec iptable_mangle 
> iptable_filter ip_tables x_tables fbcon tileblit font bitblit softcursor 
> usbhid hid ac97_bus snd_util_mem btusb bluetooth video output emu10k1_gp 
> gameport snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss 
> snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi 
> snd_seq_midi_event snd_seq snd_timer snd_seq_device gspca_zc3xx 
> gspca_main videodev v4l1_compat v4l2_compat_ioctl32 psmouse snd 
> serio_raw nvidia(P) k8temp vga16fb vgastate edac_core edac_mce_amd 
> soundcore snd_page_alloc i2c_nforce2
> 
> Particularly the bit BUG: soft-lock up!
> 
> Graphics card  info etc:GeForce 8400 GS/PCI/SSE2
> 
> 3.2.0 NVIDIA 195.36.24
> 
> Pictures slideshow is the screensaver being used!

<http://www.google.com/search?hl=en&complete=0&q=ubuntu+%2Bcompiz+%2BBUG%3A+soft+lockup+-+++CPU%231+stuck+for&btnG=Search>

Try turning off compiz (System|Pref...|Appearance|Visual...|Extra) and
see if you still get the lockup using the same screensaver.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/528859
[BUG: soft lockup - CPU#1 stuck for 61s! [compiz.real:1801] - expired]
You might want to add your pastebin logs to that one.

Also:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/585765
[Ubuntu 10.04 random freezes]

I notice in the pastebin kernel log that just before the lockup you get:

ata1: lost interrupt (Status 0x58)
ata1: drained 32768 bytes to clear DRQ.

So maybe:
<http://www.google.com/search?hl=en&complete=0&q=ubuntu+%2B"ata1%3A+lost+interrupt+(Status+0x58)"&btnG=Search>

Looks like you may have your work cut out for you... sorry.