On Thu, 16 Apr 2015 15:21:46 +0800
Bret Busby <bret.busby@gmail.com> wrote:
> On 16/04/2015, Petter Adsen <petter@synth.no> wrote:
> > On Thu, 16 Apr 2015 14:46:46 +0800
> > Bret Busby <bret.busby@gmail.com> wrote:
> >
> >> On 14/04/2015, Bret Busby <bret.busby@gmail.com> wrote:
> >>
> >>
> >> <snip>
> >>
> >> >
> >> > In the Debian 7 installation on the Acer V3-772G, for
> >> > System -> Settings -> Details -> Overview, it has
> >> >
> >> > "
> >> > Processor: Intel Core i&-4702MQ CPU @ 2.20GHz x 8
> >> > Graphics: Gallium 0.4 on llvmpipe (LLVM 0x209)
> >> > "
> >> >
> >> > and, for
> >> >
> >> > System -> Settings -> Details -> Graphics, it has
> >> >
> >> > "
> >> > Driver: Gallium 0.4 on llvmpipe (LLVM 0x209)
> >> > Experience: Fallback
> >> > "
> >> >
> >>
> >> I note that, having just installed (and presently updating) Ubuntu
> >> 14.04LTS, on the Acer E5-521-238Q, the same graphics drive shows as
> >> being used, as for Debian 7 on the Acer V3772G;
> >>
> >> from System Settings -> Hardware -> Overview, I have
> >>
> >> "
> >> Processor: AMD E2-6110 APU with AMD Radeon R2 Graphics x4
> >> Graphics: Gallium 0.4 on llvmpipe (LLVM 3.4, 128 bits)
> >> "
> >>
> >> and the external monitor does not work with either Debian 7 or
> >> Ubuntu 14.04LTS.
> >>
> >> So, whilst the Ubuntu web site shows the CPU to be certified as
> >> compatible - at
> >> http://www.ubuntu.com/certification/catalog/component/dmi/4365/dmi%3AAMDE2-6110APUwithAMDRadeonR2Graphics/
> >>
> >> it appears to me, that both Debian 7 and Ubuntu 14.04 LTS, do not
> >> really have an adequate driver for that CPU ("Processor: AMD
> >> E2-6110 APU with AMD Radeon R2 Graphics x4), as they both can not
> >> drive an external monitor through it.
> >
> > I *seriously* doubt that the CPU has anything to do with it. It will
> > either run x86 code (ie Debian/Ubuntu) or it won't. This is more
> > likely a problem with the GPU driver, or the way X is set up.
> >
> > What output do you get from "xrandr" when you have booted the
> > machine with the monitor connected?
> >
>
> In Ubuntu 14.04 LTS;
>
> "
> bret@bret-Aspire-E5-521:~$ xrandr
> xrandr: Failed to get size of gamma for output default
> Screen 0: minimum 1366 x 768, current 1366 x 768, maximum 1366 x 768
> default connected primary 1366x768+0+0 0mm x 0mm
> 1366x768 76.0*
> "
>
> In Debian 7;
>
> "
> bret@debian-Acer-E5-521:~$ xrandr
> xrandr: Failed to get size of gamma for output default
> Screen 0: minimum 1366 x 768, current 1368 x 768, maximum 1368 x 768
> default connected 1368x768+0+0 0mm x 0mm
> 1366x768 0.0
> 1368x768 0.0*
> "
So X can only see one screen. I take it this is a laptop, and the
screen X sees here is the internal screen? How is the other screen
connected - HDMI, DVI, D-SUB, DP? I will see if I can get the time
later today to read through all your previous messages on this and see
what the outputs you have posted can tell me, right now the only thing
I can think of is to try the AMD fglrx driver if you haven't already.
If the GPU in your machine is a newer model, that might help. I would
suggest you do a web search on the GPU model number, "radeon" and
"second display" (all in one string), and see what you come up with -
maybe the problem is a common one.
Petter
--
"I'm ionized"
"Are you sure?"
"I'm positive."
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