On 2015-08-20 21:17 +0200, Haines Brown wrote: > Startx on a jessie desktop machine goes to a VESA display instead of the > higher resolution supported by my video card.
That could be a kernel bug, or the sign of a failing monitor (it might no longer give correct EDID information, for instance). Running "dmesg | grep nouveau" might give some hints. > In Xorg log is the error: > > (EE) NOUVEAU(0): [COPY] failed to allocate class > > I searched on line for what this means without luck. Only a hint that > it might be a harmless errpr. Anyone know? It probably means that you have a Tesla card which does not have a copy engine, in which case the error message is indeed harmless. From a chat I had last year on IRC[1] with upstream (zwenna is me, imirkin_ is Nouveau developer Ilia Mirkin): ,---- | 12:08 #nouveau: < zwenna> xf86-video-nouveau 1.0.11 prints an an X_ERROR message in the X log file | 12:08 #nouveau: < zwenna> (EE) NOUVEAU(0): [COPY] failed to allocate class. | 12:08 #nouveau: < zwenna> it seems to work fine though | 12:09 #nouveau: < imirkin_> zwenna: mind uploading your xorg log + dmesg to pastebin? | 12:13 #nouveau: < zwenna> imirkin_: Xorg log at http://pastebin.com/Z4MJitRT | 12:14 #nouveau: < imirkin_> zwenna: ah yeah. G86 doesn't have a copy engine... | 12:14 #nouveau: < zwenna> dmesg is probably not that useful, I booted over two weeks ago | 12:14 #nouveau: < imirkin_> yeah, the xorg log is enough | 12:14 #nouveau: < imirkin_> let me take a look at the code... | 12:14 #nouveau: < imirkin_> it shouldn't even be trying to create a copy engine... | 12:16 #nouveau: < imirkin_> zwenna: it's harmless. there should be a check in the TESLA bit of nouveau_copy.c... | 12:19 #nouveau: < imirkin_> (although i wonder if pcrypt2 can be used for this...) | 12:20 #nouveau: < imirkin_> i forget if it can do rects or just straight up copies... | 12:22 #nouveau: < imirkin_> nope, no rects. so it's stuck with m2mf. which is fine. | 12:29 #nouveau: < imirkin_> zwenna: i sent a patch to the list: http://lists.freedesktop.org/archives/nouveau/2014-September/018641.html | 12:34 #nouveau: < zwenna> imirkin_: thanks `---- The patch was committed to git[2], but no new release has been made yet. > I decided to reconfigure xserver-xorg > > # dpkg-reconfigure -phigh xserver-xorg > > This only returned me to the # prompt without asking any > questions. Should it not be asking questions even if the nouveau > driver does not allocate class? No, dpkg-reconfigure xserver-xorg is not supposed to do anything these days. If you want to try a different video driver (say, the modesetting driver), you can try this 4-line /etc/X11/xorg.conf: --8<---------------cut here---------------start------------->8--- Section "Device" Identifier "n" Driver "modesetting" EndSection --8<---------------cut here---------------end--------------->8--- Cheers, Sven 1. http://people.freedesktop.org/~cbrill/dri-log/?channel=nouveau&date=2014-09-04 2. http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=02c1aee91ae22b58e777716ffd38397f9df0a087
