I am confirming this issue. My laptop is DELL Vostro 3550. BIOS A11. I am using
ZorinOS since version 6, now I have installed version 7. I still have this
issue. I am finding though that the issue is worse by far if I use AMD GPU than
if I use Intel GPU. I switch between them with AMD CCC, howev
Public bug reported:
My laptop is DELL Vostro 3550. BIOS A11.
If I use external monitor and extend my desktop to both the built-in laptop
display and the external LCD, the display settings are auto-changed by the
system. This may include:
- Resetting to "mirrored" displays at 1024x768
- Resettin
OK, I've installed ubuntu 13.04 since that's the version that ZorinOS 7 is
built on (raring) and I ran the command ubuntu-bug xorg.
I've subscribed you, Christopher M. Penalver (penalvch) to that bug report.
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1293425
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Lee Willis, I was having the very same issue with fglrx - corrupted display,
barely usabe, clicking didn't work, even after barely possible to target what
you wanted to click, etc.
However, I came to this fix that works - run Terminal with keyboard CTRL+ALT+T
and do sudo su and then xrandr --out
I am now using Ubuntu 14.04 from the link above. At the time of starting this
bug report I was using 13.04 (raring) and then also 13.10 (saucy) but the
problem was the same with both. Will see how will it be with 14.04.
So far I have noticed one difference though! If I did cat
/sys/kernel/debug/
It just happened on 14.04 - my internal laptop monitor got disabled and now I
am writing with only external monitor enabled...
Let's see how AMD drivers do.
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It just happened on 14.04 - my internal laptop monitor got disabled and
now I am writing with only external monitor enabled...
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https://bugs.launchpad.net/bugs/907381
Title:
Reportin first test with AMD drivers. With AMD GPU enabled, I have massive
screen corruption if I enable both monitors. If I only enable one, corruption
is no longer present, however spontaneous switching/mirroring occurs.
Will now switch to Intel GPU and report back.
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OK, spontaneous switch just happened with Intel GPU.
user@DELL-Vostro-3550:~$ uptime
13:09:48 up 2:43, 2 users, load average: 0,22, 0,14, 0,08
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I have found a possible workaround.
For two days now I haven't had spontaneous monitor/resolution swithing, here's
what I have done.
Immediately after boot I launch terminal and do the following:
Vostro-3550:~$ xinput
⎡ Virtual core pointer id=2[master pointer (3)]
Lee Willis, could you please try my possible workaround
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1293425 and report
if you find the same results?
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Found a related bug IMHO:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1063658
With that one 'xinput disable x' was also workaround.
If you go and read that bug report, you can see that it really is about the
same thing, only that the user didn't use external monitor for a while and when
Workaround seems to work. It's been a week and the
switching/mirroring/turning off of monitors hasn't happened.
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Title:
[Dell Vostro 3550] D
Lee Willis, have you had time to test if disabling Video Bus (2×) and Dell WMI
hotkeys with xinput disable is working for you?
I haven't had a single incident for a whole week since I use that.
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I think the workaround can almost be confirmed, I no longer have issues
described in this bug report. I am only waiting for Lee Willis to
confirm that it works the same for him and IMHO then the workaround can
be official.
I have made a script (path-to-my-script) with contents:
xinput disable 7
xi
Lee Willis - that's very nice to hear!
Yeah, it would be interesting to know the actual issue, so I would also
like the developers to further investigate it. If it were purely
hardware error, the switching would occur in Windows (7 in my test case)
too, but it doesn't.
However, I am very glad tha
Has anyone tried adding radeon.dpm=1 to your grub?
Try:
edit /etc/default/grub and add the 'radeon.dpm=1' to the
GRUB_CMDLINE_LINUX_DEFAULT line, so it would look something like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.dpm=1"
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After you save/quit the text editor, update grub:
sudo update-grub
REBOOT
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https://bugs.launchpad.net/bugs/1304912
Title:
Ubuntu 14.04 laptop uses lot of power
Lars, is this improvement just after going from 14.04 to 14.10 or did
you try adding radeon.dpm=1 to grub?
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Title:
Ubuntu
Just reporting back after a while... Workaround works. Not one single
incident since the last time I wrote here.
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Title:
[Dell Vostro 3550]
I have found that Dell WMI hotkeys id=17 [slave keyboard (3)] doesn't
need disabling. Even more, if disabled, login fails when no external
monitor is connected.
I will try if disabling only id=8/id=7 is enogh for workaround and I'll
report back.
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So far, it seems that disabling JUST id=8 works fine. If both are
enabled, the original problems remain (as expected). If I only disable
id=7, problems are the same.
I will test this a few more days to confirm further. It would be very
good if Lee Willis can reproduce this and confirm also.
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Y
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