I switched over to the Lucid kernel 2.6.32-16 as I saw that the RV740 initialization fix was backported.
With that kernel the system hard locks too! There is a strange thing happening with both kernels too that might be related to this: After some idle time of the system it begins to stop screen updates whenever the mouse is not moving or I'm not typing on the keyboard. It even freezes (visually) when watching a video that doesn't consume much CPU time. I first thought this might be an issue for the graphics driver but then noticed that the monitoring graphs do not "jump" when the screen froze and wake it up again by simply typing or moving the mouse. So the whole thing of gathering data and up to displaying them in some applet or so stops. This does occur even when running something in a terminal: $ while [ 0 ]; do oldtime=$time; time=`date +'%s.%N'`; echo "($time - $oldtime - 1) * 1000" | bc -l | xargs printf "[$time] missed %1.0f ms\n"; sleep 1; done [1268384756.719304336] missed 1268384755 ms [1268384760.956376208] missed 3237 ms [1268384761.969785663] missed 13 ms [1268384762.989047073] missed 19 ms [1268384764.008941132] missed 20 ms [1268384765.027888570] missed 19 ms [1268384766.047799420] missed 20 ms [1268384767.067276339] missed 19 ms [1268384768.085794982] missed 19 ms [1268384769.105963537] missed 20 ms [1268384774.316241301] missed 4210 ms [1268384775.333372425] missed 17 ms [1268384776.352990352] missed 20 ms [1268384777.372331300] missed 19 ms [1268384778.391534041] missed 19 ms [1268384779.411323055] missed 20 ms [1268384780.430166883] missed 19 ms [1268384790.774276584] missed 9344 ms [1268384791.795092061] missed 21 ms [1268384794.283809211] missed 1489 ms [1268384795.303478736] missed 20 ms [1268384797.004297712] missed 701 ms [1268384798.019775137] missed 15 ms [1268384799.038297034] missed 19 ms [1268384800.056771282] missed 18 ms [1268384801.937260241] missed 880 ms [1268384802.954018928] missed 17 ms [1268384821.527875748] missed 17574 ms [1268384822.544634286] missed 17 ms [1268384823.564795546] missed 20 ms [1268384824.583885167] missed 19 ms This does not occur when the system is under heavy fire. I just made a test with iozone: $ iozone -e -i0 -i1 -i2 -i8 -s1g -r128k -t2 -F /tmp/ioz1.tmp /tmp/ioz2.tmp And during the tests no freeze occurs as long as there is much disk activity or CPU time consumed, although in betwwen there are some lags: [1268385201.647888700] missed 376064 ms [1268385202.667718263] missed 20 ms [1268385203.686453300] missed 19 ms [1268385204.705197525] missed 19 ms [1268385205.723523933] missed 18 ms [1268385206.741247016] missed 18 ms [1268385207.759106707] missed 18 ms [1268385208.777791422] missed 19 ms [1268385209.796496832] missed 19 ms [1268385210.820466739] missed 24 ms [1268385211.837558364] missed 17 ms [1268385212.858761885] missed 21 ms [1268385214.097645350] missed 239 ms [1268385215.115377250] missed 18 ms [1268385216.134211222] missed 19 ms [1268385217.154853358] missed 21 ms [1268385218.175325240] missed 20 ms [1268385219.195318476] missed 20 ms [1268385220.215492131] missed 20 ms [1268385221.234281344] missed 19 ms [1268385222.256452693] missed 22 ms [1268385223.276511999] missed 20 ms [1268385224.293457919] missed 17 ms [1268385225.314186158] missed 21 ms [1268385226.332445699] missed 18 ms [1268385227.352857354] missed 20 ms [1268385228.373801455] missed 21 ms [1268385229.396393417] missed 23 ms [1268385230.413421470] missed 17 ms [1268385231.432281705] missed 19 ms [1268385232.449653434] missed 17 ms [1268385233.465209096] missed 16 ms [1268385234.483850229] missed 19 ms [1268385235.509392074] missed 26 ms [1268385236.528719651] missed 19 ms [1268385244.902537384] missed 7374 ms [1268385245.920551000] missed 18 ms [1268385246.939455069] missed 19 ms [1268385247.958850255] missed 19 ms [1268385248.977521177] missed 19 ms [1268385249.996965732] missed 19 ms [1268385251.016700905] missed 20 ms [1268385252.036601651] missed 20 ms [1268385253.055755097] missed 19 ms [1268385254.074694544] missed 19 ms [1268385255.093511592] missed 19 ms [1268385256.112895141] missed 19 ms [1268385257.133067760] missed 20 ms [1268385258.152883261] missed 20 ms [1268385259.172642222] missed 20 ms [1268385260.193081324] missed 20 ms [1268385261.213051581] missed 20 ms [1268385262.233793374] missed 21 ms [1268385263.252592696] missed 19 ms [1268385264.272066036] missed 19 ms [1268385265.290966382] missed 19 ms [1268385266.310754032] missed 20 ms [1268385267.329843235] missed 19 ms [1268385268.348682021] missed 19 ms [1268385269.367186007] missed 19 ms [1268385270.383705176] missed 17 ms [1268385271.401827898] missed 18 ms [1268385272.421369689] missed 20 ms [1268385273.441215581] missed 20 ms [1268385274.460254882] missed 19 ms [1268385275.478569471] missed 18 ms [1268385276.498159280] missed 20 ms [1268385277.516654630] missed 18 ms [1268385278.535596725] missed 19 ms [1268385279.554530995] missed 19 ms [1268385280.573329515] missed 19 ms [1268385281.591845420] missed 19 ms [1268385282.612514364] missed 21 ms [1268385283.631298742] missed 19 ms [1268385286.544229389] missed 1913 ms [1268385287.556636047] missed 12 ms [1268385288.576541627] missed 20 ms [1268385289.598175901] missed 22 ms [1268385290.617307797] missed 19 ms [1268385291.635853918] missed 19 ms [1268385292.655010176] missed 19 ms [1268385293.673472005] missed 18 ms [1268385294.693017881] missed 20 ms [1268385295.712772752] missed 20 ms [1268385304.930432031] missed 8218 ms [1268385305.949625076] missed 19 ms [1268385306.968789897] missed 19 ms [1268385307.989323262] missed 21 ms [1268385309.011853022] missed 23 ms [1268385310.030813286] missed 19 ms [1268385311.050188986] missed 19 ms [1268385312.069472747] missed 19 ms [1268385313.087494584] missed 18 ms [1268385314.105977585] missed 18 ms [1268385315.125881632] missed 20 ms [1268385316.145432518] missed 20 ms [1268385317.164100389] missed 19 ms [1268385318.184390192] missed 20 ms [1268385319.203191721] missed 19 ms [1268385320.222727187] missed 20 ms [1268385321.242485385] missed 20 ms [1268385322.262090161] missed 20 ms [1268385323.281309415] missed 19 ms [1268385324.299992680] missed 19 ms [1268385325.324468542] missed 24 ms [1268385326.344347331] missed 20 ms [1268385327.363208736] missed 19 ms [1268385328.381770279] missed 19 ms [1268385329.400930179] missed 19 ms [1268385330.419149032] missed 18 ms [1268385331.437731793] missed 19 ms [1268385332.457423210] missed 20 ms [1268385333.476799690] missed 19 ms [1268385334.495517425] missed 19 ms [1268385335.514823051] missed 19 ms [1268385364.964737614] missed 28450 ms [1268385370.220132257] missed 4255 ms [1268385371.233817079] missed 14 ms [1268385372.252670080] missed 19 ms [1268385373.271720196] missed 19 ms [1268385374.291077064] missed 19 ms [1268385375.309868997] missed 19 ms [1268385376.330261335] missed 20 ms [1268385377.349058161] missed 19 ms [1268385378.367868284] missed 19 ms [1268385379.386721841] missed 19 ms [1268385380.432726379] missed 46 ms [1268385381.451819368] missed 19 ms [1268385382.470815750] missed 19 ms [1268385383.489348571] missed 19 ms [1268385384.507585794] missed 18 ms [1268385385.527378396] missed 20 ms [1268385386.546307899] missed 19 ms [1268385387.567250411] missed 21 ms [1268385388.590201621] missed 23 ms [1268385389.608641440] missed 18 ms [1268385390.627218152] missed 19 ms [1268385391.645679931] missed 18 ms [1268385392.665986786] missed 20 ms [1268385393.685410829] missed 19 ms [1268385394.704594180] missed 19 ms [1268385395.724589393] missed 20 ms [1268385396.743582746] missed 19 ms [1268385397.762135525] missed 19 ms [1268385398.781740249] missed 20 ms [1268385399.800816996] missed 19 ms [1268385400.819745053] missed 19 ms [1268385401.838294347] missed 19 ms [1268385402.856943277] missed 19 ms [1268385403.876452309] missed 20 ms [1268385404.896807795] missed 20 ms [1268385405.917289903] missed 20 ms [1268385406.936157172] missed 19 ms [1268385407.955193973] missed 19 ms [1268385408.974182796] missed 19 ms [1268385409.992956276] missed 19 ms [1268385411.014282119] missed 21 ms [1268385412.034321170] missed 20 ms [1268385413.053546016] missed 19 ms [1268385414.072184427] missed 19 ms [1268385415.091106808] missed 19 ms [1268385416.110275081] missed 19 ms [1268385417.129350226] missed 19 ms [1268385418.148962399] missed 20 ms [1268385419.167623270] missed 19 ms [1268385420.186145874] missed 19 ms [1268385421.205090315] missed 19 ms [1268385422.223175484] missed 18 ms [1268385423.244269982] missed 21 ms [1268385424.263343212] missed 19 ms [1268385425.282690264] missed 19 ms [1268385426.302533293] missed 20 ms [1268385427.321527585] missed 19 ms [1268385428.341650678] missed 20 ms [1268385429.360959848] missed 19 ms [1268385430.397859500] missed 37 ms [1268385431.416547289] missed 19 ms [1268385432.435353530] missed 19 ms [1268385433.454312164] missed 19 ms [1268385440.369414446] missed 5915 ms [1268385441.384609040] missed 15 ms [1268385442.403153352] missed 19 ms [1268385443.423447160] missed 20 ms [1268385446.672013677] missed 2249 ms [1268385447.692460016] missed 20 ms [1268385451.663003278] missed 2971 ms I don't know what to do to further investigate this issue as there are no messages about hanging threads or something. This is all very strange. Please help. -- System hard locks with 2.6.33 mainline https://bugs.launchpad.net/bugs/535572 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
