On 03/14/11 23:20, Alex Deucher wrote: > On Sun, Mar 13, 2011 at 10:08 AM, Anders Eriksson <aeriksson@xxxxxxxxxxx> wrote: >> Hi, >> >> I've found what I guess is a radeon (or drm/kms) regression post 2.6.35. >> I've got my TV conneced to my RS690G over HDMI, and the display has >> always been jittery after POST and at the GRUB screen. Pre-KMS, the X >> server (or driver got it sorted), and when KMS started, the display >> stabilized right after the kernel driver was initiated. However, post >> 2.6.35, I see the jitter is back. >> >> I've spent the last month trying to bisect it, but pretty much failed. >> It appears that versions closer to 2.6.38-rcX are more prone to display >> jitter, while 2.6.36 or so can have many successful runs. It also >> appears to be related to device power-on order, or so I've come to >> believe; A stable display can turn jittery, just by power cycling the TV. >> >> I've uploaded a video of a 38-rc8 boot: >> http://www.easy-share.com/1914220540/2.6.38-rc8_bad_x.mp4 >> >> You'll see jitter at the POST screen and GRUB. When KMS kicks in it >> stabilizes, and when Freevo starts X, it's back to jitter. > Does plain X or gnome/kde jitter too or just freevo? > Yes. A plain xinit with an xterm without window manager shows the same thing. (I run freevo on on X, not fb) Btw, These are the X packages I use: libXxf86misc-1.0.3 libXxf86dga-1.1.2 libXxf86vm-1.1.1 xf86dga-1.0.3 xf86vidmodeproto-2.3.1 xf86miscproto-0.9.3 xf86dgaproto-2.1 xf86bigfontproto-1.2.0 xf86driproto-2.1.1 xf86rushproto-1.1.2 xf86-input-evdev-2.6.0 xf86-video-ati-6.14.0 xf86-input-keyboard-1.5.0 xf86-input-mouse-1.6.0 > Alex > >> The jitter is always of the same kind. It looks like an old tv set which >> loses sync. The contents on the display is, for a split second, placed >> at the wrong part of the screen (vertically and to some extent >> horizontally), and every 5-15 seconds or so, there is a big reset when >> the TV tries to restart things (I guess). At the resets, thee is a loud >> 'ping' in the nearby stereo too... >> >> During the bisect (and a t 38-rc8) I've seen this both at the console >> (post KMS) and in X, so I'm not sure where the error is. I hope some of >> you can get a better idea of where to hunt for the bug by looking at the >> video. >> >> -Anders >> _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
