On poniedziałek, 19 marca 2012 o 15:35:48 Nick Bowler wrote:
Hi folks,
Just upgraded to Linux 3.3 on my desktop and noticed that the VGA output on my card w/ nouveau is totally black (both at the console and in X). Almost everything appears to work normally: DPMS works, modesetting works, DDC works... all messages indicate that things are working -- just the image is completely black.
The VGA is one of two outputs in use: the other (DVI) output works normally. The card also has an unused TV-out port, FWIW.
The card is an NV36 generation (Geforce FX5700 AGP). This is a regression from Linux 3.2 -- unfortunately, bisection has proved extremely difficult because the intermediate kernels git is asking me to test panic immediately on boot (and compiling Linux takes a fairly long time on this box too). The failed attempt went like this:
git bisect start 'drivers/gpu' # bad: [c16fa4f2ad19908a47c63d8fa436a1178438c7e7] Linux 3.3 git bisect bad c16fa4f2ad19908a47c63d8fa436a1178438c7e7 # good: [805a6af8dba5dfdd35ec35dc52ec0122400b2610] Linux 3.2 git bisect good 805a6af8dba5dfdd35ec35dc52ec0122400b2610 # skip: [5d56fe5fd794a98c4f446f8665fd06b82e93ff64] Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-core-next git bisect skip 5d56fe5fd794a98c4f446f8665fd06b82e93ff64 # good: [dffc9ceb55695f121adc57dd1fde7304c3afe81e] gma500: kill virtual mapping support git bisect good dffc9ceb55695f121adc57dd1fde7304c3afe81e # skip: [5c2a5ce689c99037771a6c110374461781a6f042] drm: add missing exports for i810 driver. git bisect skip 5c2a5ce689c99037771a6c110374461781a6f042 # skip: [44517c44496062180a6376cc704b33129441ce60] drm/radeon/kms: Add an MSI quirk for Dell RS690 git bisect skip 44517c44496062180a6376cc704b33129441ce60
(I stopped at this point)
I'm running the latest git xf86-video-nouveau, but since the issue occurs at the console it's probably not too important...
Let me know if you need any more info,
I created a Bugzilla entry at https://bugzilla.kernel.org/show_bug.cgi?id=42983 for your bug/regression report, please add your address to the CC list in there, thanks!