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