[kde] Re: KDE 4.6.0 and nvidia drivers
John Woodhouse posted on Sat, 30 Apr 2011 08:39:48 -0700 as excerpted: On problems in this direction maybe with either driver I did see something on the web somewhere relating to noflip causing problems one way or the other. No interest at the time so no further info. Yes. The nvidia option is apparently noflip, but on native drivers it's normally 'Option EnablePageFlip boolean' (where boolean can be yes/true/1 or no/false/0). Page flipping is where, instead of the driver having a page back-buffer and front-buffer, composing stuff in the back-buffer then blitting (fast- block-copying) it over to the front-buffer, when the image in the back- buffer is finished being composed, the pointers for the front- and back- buffers will reverse, so the former back-buffer is now the front-buffer that's direct-painted to screen, while the former front-buffer is now the back-buffer, where the next screen image is composed. Because page-flipping only involves two memory address pointers instead of blitting the whole area that has changed, it's **FAR** faster and much more optimized than the blitting method. Done well, it avoids tearing and certain other artifacts too, by timing things so the page flip only happens when nothing drawing into the buffer. But that's the challenge, getting and keeping everything in sync. If the page flips at the wrong time, bad things can happen, ugly artifacts, even crashes, and graphics crashes are definitely capable of taking the whole kernel and thus the entire system with them. The the option. And yes, I've definitely read that turning no-flip on can help dramatically with specific nVidia hardware and drivers. -- Duncan - List replies preferred. No HTML msgs. Every nonfree program has a lord, a master -- and if you use the program, he is your master. Richard Stallman ___ This message is from the kde mailing list. Account management: https://mail.kde.org/mailman/listinfo/kde. Archives: http://lists.kde.org/. More info: http://www.kde.org/faq.html.
[kde] Re: KDE 4.6.0 and nvidia drivers
You don't say which kde version you are using. As far as web,mail and the editors go I haven't seen any problems at all with nouveau and 64bit kde 4.6.0. I did have one or two instances as you describe on 32bit. I installed the nvidia driver very soon after loading it though. For all I know that might have been the cause. Some of the lock up's seem to be down to something sleeping for far too long and maybe building up excesses in the queue can cause further problems. I now install no acpi and haven't noticed that sort of delay on either 32 or 64bit. All I had on 32 then was missed mouse clicks or they seemed that way to me. Could be changes in kde. On 64bit which I was reluctant to install due to past problems with finding 64bit apps I installed 32bit Opera without any problem. My package manager complained but just downloaded a lot of 32bit libs. There does seem to be a very slight performance problem. New tabs and tab closings sometimes have a noticeable delay. I am very sensitive to spotting that sort of thing though. As to nouveau I have the window fading which I find useful as I can read what's underneath but sizing a window with the mouse is a joke. It will track so far, then fall well behind and then stop. It catches up when the mouse button is released. Sort of OK but messy. I'm just about to try and install the nvidia driver on 64bit. On problems in this direction maybe with either driver I did see something on the web somewhere relating to noflip causing problems one way or the other. No interest at the time so no further info. Opensuse 11.4 kde 4.6.0 - 6. John - Original Message From: A. Boggiano boggi...@gmail.com To: kde@mail.kde.org Sent: Fri, 29 April, 2011 15:03:06 Subject: [kde] Re: KDE 4.6.0 and nvidia drivers Il 29/04/2011 00:23, John Woodhouse ha scritto: This is my story: I'm using Fedora (now 14) on my HP HDX-18 with an nvidia GPU. I don't want to use any closed driver since I need a very little 3D performances (I'm using only the simply KDE effects: show all windows...that's it!):so, I'm using the noveau driver. Well, my machine freezes once a day: I can still ssh in it and reboot nicely but the X system doesn't respond! (I can't copy/paste here the Xorg.log but I can see noveau errors). And yes, the freeze occours even if I don't enable the desktop effects. From a couple of days I'm using gnome (no desktop effects) and my work is running smootly. This is *NOT* the solution, but, rigth now, it gives me some oxygen in order to try to investigate on the problem. I really don't know if the problem is noveau || kde || kwin || hw problem || bad luck, but this is my story! ___ This message is from the kde mailing list. Account management: https://mail.kde.org/mailman/listinfo/kde. Archives: http://lists.kde.org/. More info: http://www.kde.org/faq.html. ___ This message is from the kde mailing list. Account management: https://mail.kde.org/mailman/listinfo/kde. Archives: http://lists.kde.org/. More info: http://www.kde.org/faq.html.
[kde] Re: KDE 4.6.0 and nvidia drivers
On Fri, 29 Apr 2011 12:36:15 + (UTC) Duncan 1i5t5.dun...@cox.net articulated: [snip] Is there something wrong with your MUA? I am not a fan of HTML mail in a mail forum either; however, all I need do is click on the text view option in claws-mail and all is well. Doesn't your MUA have an option to view the text version of a message? And why burden the OP, and others with this long drawn out legalese, which probably isn't even accurate anyway, when it was not pertinent to the OP's question? -- Jerry ✌ kde.u...@seibercom.net Disclaimer: off-list followups get on-list replies or get ignored. Please do not ignore the Reply-To header. __ If all else fails, immortality can always be assured by spectacular error. John Kenneth Galbraith ___ This message is from the kde mailing list. Account management: https://mail.kde.org/mailman/listinfo/kde. Archives: http://lists.kde.org/. More info: http://www.kde.org/faq.html.
[kde] Re: KDE 4.6.0 and nvidia drivers
Il 29/04/2011 00:23, John Woodhouse ha scritto: There is rather a lot in suse bugzilla about problems with KDE once an nvidia driver is installed. Seems it was regarded as a killer for their release of 4.6.0 in 11.4. Ok this is opensuse but from what I have seen bugs just get passed on to KDE. I'm told 32bit crashes but from my brief trials it just went flakey Missed clicks mostly. This is my story: I'm using Fedora (now 14) on my HP HDX-18 with an nvidia GPU. I don't want to use any closed driver since I need a very little 3D performances (I'm using only the simply KDE effects: show all windows...that's it!):so, I'm using the noveau driver. Well, my machine freezes once a day: I can still ssh in it and reboot nicely but the X system doesn't respond! (I can't copy/paste here the Xorg.log but I can see noveau errors). And yes, the freeze occours even if I don't enable the desktop effects. From a couple of days I'm using gnome (no desktop effects) and my work is running smootly. This is *NOT* the solution, but, rigth now, it gives me some oxygen in order to try to investigate on the problem. I really don't know if the problem is noveau || kde || kwin || hw problem || bad luck, but this is my story! ___ This message is from the kde mailing list. Account management: https://mail.kde.org/mailman/listinfo/kde. Archives: http://lists.kde.org/. More info: http://www.kde.org/faq.html.
