On Wed, Nov 08, 2017 at 09:43:29AM +0200, Henri Sivonen wrote: > I agree that workstation GPUs should be avoided. Even if they were as > well supported by Linux distro-provided Open Source drivers as > consumer GPUs, it's at the very least more difficult to find > information about what's true about them. > > We don't need the GPU to be at max spec like we need the CPU to be. > The GPU doesn't affect build times, and for running Firefox it seems > more useful to see how it runs with a consumer GPU. > > I think we also shouldn't overdo multi-monitor *connectors* at the > expense of Linux-compatibility, especially considering that > DisplayPort is supposed to support monitor chaining behind one port on > the graphics card. The Quadro M2000 that caused trouble for me had > *four* DisplayPort connectors. Considering the number of ports vs. > Linux distros Just Working, I'd expect the prioritizing Linux distros > Just Working to be more useful (as in letting developers write code > instead of troubleshoot GPU issues) than having a "professional" > number of connectors as the configuration offered to people who don't > ask for a lot of connectors. (The specs for the older generation > consumer-grade Radeon RX 460 claim 5 DisplayPort screens behind the > one DisplayPort connector on the card, but I haven't verified it > empirically, since I don't have that many screens to test with.)
Yes, you can daisy-chain many monitors with DisplayPort, but there's a bandwidth limit you need to be aware of. DP 1.2 can only handle 4 HD screens at 60Hz, and *one* 4K screen at 60Hz DP 1.3 and 1.4 can "only" handle two 4K screens at 60Hz. Also, support for multi-screen over DP is usually flaky wrt hot-plug. At least that's been my experience on both Linux and Windows, and I hear Windows is actually worse. Also, I usually get my monitors set in a different order when I upgrade the kernel. (And I'm only using two HD monitors) Mike _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
