Bill,
The reason the Chromebook is so cheap is because it has quite
minimal memory and cpu performance. The idea is that it's just to
support the Chrome browser and everything should be done/stored in the
cloud. The cup doesn't have avx. There are of course Chromebooks which
have much better specs, but are more expensive. Here is cat /proc/cpuinfo:
(xenial)jph@localhost:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 76
model name : Intel(R) Celeron(R) CPU N3060 @ 1.60GHz
stepping : 4
microcode : 0x40e
cpu MHz : 2582.300
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology
nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2
ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes
rdrand lahf_lm 3dnowprefetch ida arat epb dtherm retpoline kaiser
tpr_shadow vnmi flexpriority ept vpid tsc_adjust smep erms
bugs : cpu_meltdown spectre_v1 spectre_v2
bogomips : 3200.00
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
I did install qt5-default as you suggested, but now jqt hangs at
"could not resolve: state_run:\n\nCannot load library
/home/jph/j64-807/bin/libjqt: (libQt5WebKitWidgets.so.5: cannot open
shared object file: No such file or directory)"
Bill,
Yes, putting it into developer mode is supposed to undermine the
security features of Chromebooks. But my idea is to never put information
on this little gadget that I would care about protecting. As I said, this
is just to have a machine to take on a trip to Europe.
Best Regards, Patrick
On Sun, 30 Jun 2019, bill lam wrote:
Patrick,
I'm not familiar with chromebook. What is the CPU in your CB? Is
it 64-bit x86_64? Or does it have avx?
Perhaps you can get from output of
$ cat /proc/cpuinfo
For Qt, apparently Qt lib has not installed. You may try
$ sudo apt install qt5-default
Sun, 30 Jun 2019, J. Patrick Harrington написал(а):
I'm taking a trip out of the US and don't want to take my good computer
along, but I'd like something for email & looking at photos I take.
I found that Chromebooks are really cheap: I picked up a Dell 11.6"
Chromebook at Best Buy for $129.00. The neat thing is that you can load
Ubuntu linux by using a special key combination to put it into "developer
mode"; then you can switch back and forth with the Chrome OS with just one
keystroke. You have to do a bit of work, like replacing the horrid "Netsurf"
browser with Firefox, installing openssh, installing gimp to process your
pictures, etc.
But ... of course I had to install J. j64-807 does install, but still has
problems. Jconsole works fine for numerical stuff, but plot fails with sh:
1: : Permission denied. Viewmat almost works. But jhs does work,
so I can get plots there. Unfortunately, jqt will need some work: it fails
with libQt5Core.so.5: No such file or directory. Still, these problems may
have a solution, and if so, this is a really inexpensive way to run J. I've
not seen Chromebooks mentioned here -- anyone else used one?
Regards, Patrick
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