Am 28.07.2012 10:22, schrieb Florian Philipp: > Am 27.07.2012 22:57, schrieb Michael Mol: >> On Fri, Jul 27, 2012 at 4:39 PM, Florian Philipp <li...@binarywings.net> >> wrote: >>> Am 27.07.2012 22:22, schrieb Michael Mol: >>>> On Fri, Jul 27, 2012 at 4:10 PM, Allan Gottlieb <gottl...@nyu.edu> wrote: >>>>> I am getting a new laptop. (likely dell 6430). >>>>> The two graphics options are intel HD 4000 and nvidia NVS 5200M. >>>>> Dell is as expected suggesting the 5200M. >>>>> >>>>> I do not need 3D or fast response. Dell hinted that DVDs might not play >>>>> with the intel HD 4000. This seems weird to me as the 4000 is supposed >>>>> to be a big improvement over the 3000 and I can't believe dell or others >>>>> would have sold laptops that can't play dvds >>>>> >>>>> Any comments or experiences? >>>> >>>> My Duron 750MHz was able to decode DVDs in realtime. After that, all >>>> you're doing is blitting (or using xv) the frames to the screen. I >>>> would be absolutely shocked if the Intel HD 4000 GPU couldn't handle >>>> that basic of a 2D acceleration function. >>>> >>>> Now, DVDs use MPEG2. Blu-Ray uses h.264, which is a much harder beast >>>> to decode in realtime. It's possible the HD 4000 GPU can't handle >>>> hardware decode of h.264, but I don't know. I've never looked into it. >>>> (Software decode of 1080p h.264 on my Phenom 9650 worked somewhat, but >>>> highly active scenes would cause frame drops.) >>>> >>> >>> I've experienced issues playing DVDs on fullscreen with the OSS radeon >>> driver. Therefore I'm cautious of assumptions that something works >>> simply because the input is easy to decode. Upscaling to large displays >>> with high resolutions can be an issue. >>> >>> I'm not saying the Intel driver cannot handle it. I'm just saying you >>> should try it or look for reports. >> >> How high is 'high' resolution? I was upscaling to 1600x1200 using an a >> Radeon 9600; that card would now be almost ten years old. A bit later, >> I did the same on a 2.4GHz Pentium 4 using an i845-based Intel >> graphics card. Here's the line from lspci, as run in May of 2007: >> >> 00:02.0 VGA compatible controller: Intel Corporation >> 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01) >> >> Hardware scaling a 2D image is one of the most trivial >> hardware-accelerated options GPUs perform. If someone had difficulties >> upscaling a 480p (roughly what DVDs are) to 1080p at 24 or 33fps, I >> would be very highly suspicious of a software misconfiguration. That >> kind of scaling should even be comfortably doable in software on any >> modern x86-derived processor. (With the plausible exclusion of the >> Atom CPU) >> > > 1920x1080, on-board Radeon HD 4250. I haven't diagnosed it further > (except of playing around with mplayer2 options) as it was easier to use > the closed source driver. > > Regards, > Florian Philipp
I realize this thread is pretty stale but since I talked bullshit and just now realized it, I want to correct myself: Since updating the kernel to 3.5 forced me to update the X server beyond 1.11 which in turn forced me to update ati-drivers to a version that no longer supported my Radeon HD 4250, I had to look into my issues with the open source driver. It turns out, my problems had two reasons: - I didn't enable KMS and DRM for radeon in the kernel - I didn't have x11-drivers/radeon-ucode installed Both resulted in a fully functioning X server that - could run glxgears just fine - could (with some tuning) render videos in DVD quality with opengl output - was too slow for videos in any higher resolution Regards, Florian Philipp
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