On Sun, Apr 6, 2014 at 7:16 PM, ~Stack~ <[email protected]> wrote: > Greetings, > > I am resending this as it doesn't appear in the archives and no one > responded...maybe it got routed to /dev/null or something :-) > > I have asked this question the Scientific Linux mailing list (a few > months ago) and got the suggestion I talk to the kernel guys. I pinged a > kernel guy I know, and his suggestion was to ask the Nouveau list. So > here I am. :-) > > I have had my work laptop for well over a year now running SL6 and > everything has been fantastic. Never once have I had a kernel > panic/problem. That is until the kernel 2.6.32-400+ series. Rolling back > to the previous kernel 2.6.32-358 works perfectly, which is what I have > been doing. The problem is that I am now getting the same issue on other > laptops with the latest kernel 2.6.32-431.11.2.el6.x86_64. My laptop is > Dell Precision M4600. 80% of the time it is plugged into my Dell PRO2X > laptop dock which has my dual Display Port Dell U2410 monitors (betcha > can't tell what vendor my employer frequently buys from...;-). > > My working kernel is: 2.6.32-358.23.2.el6.x86_64 (and anything before). > > The problem kernel is: 2.6.32-431.1.2.el6.x86_64 and every revision > up-to the latest 2.6.32-431.11.2.el6.x86_64.
These are redhat frankenkernels, perhaps you should be talking to redhat? You might try a kernel bisect, if they supply a set of patches between rpm's. Also, what hardware do these laptops have? (lspci otuput would be nice). Can you test with a fresh kernel (e.g. some distro's livecd) rather than one based on a 5-year old release? > > I get horrible color distortions on the secondary display. This happens > every time. At BIOS both monitors display perfect color in a duplicate > view showing the same image on both screens. Grub only shows primary > screen (normal for this setup). When Grub loads the nouveau display > driver the second screen turns on and the display looks like a rainbow > puked glitter. Not even exaggerating. Crazy jumbled colors in warped > patterns that move across the screen. The primary monitor is just fine. > At first I thought it was the monitor, but swapping the monitors shows > they are fine. Other testing showed that the hardware is just fine too > and the final proof was evident by being able to boot into the previous > kernel and not having an issue. > > I never have run the NVidia drivers on this laptop. It has always been > Nouveau. (I run NVidia drivers on other systems, but this laptop has > previously always been rock solid with SL+Nouveau so I never bothered). > > Today I found that the new batch of Dell Latitudes with a fresh install > do nearly the same thing. The image is viewable, but is horribly color > distorted. The really weird thing with the Latitudes is that I can > disable the screen (via software) and about 4 out of 5 times, when I > re-enable it I get a proper screen again. It always goes bad on a fresh > boot and this trick does not appear to work with my Precision. I dug out > the 2.6.32-358 kernel RPM, installed it on one and bingo...no issues. > Screen is great and works just fine. > > So now I am more than ever convinced there is an issue with nouveau in > any of the kernels post 2.6.32-358.23.2. > > I have searched around and asked around but haven't found a solution. I > can put the kernel into all kinds of debugging and capture GB's of data, > but I would prefer to capture only what is useful. Any recommendations > on what output I should capture? Any suggestions on narrowing the > problem down to something other then "Its the kernel"? > > Thanks! I appreciate the help! > > ~Stack~ > > > > > _______________________________________________ > Nouveau mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/nouveau > _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
