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#1 2015-07-25 04:26:53
- jdevelop
- Member
- Registered: 2014-04-18
- Posts: 48
ThinkPad T540p - garbage on screen on each cold start
Hi!
I got Arch on ThinkPad T540 with dual Intel/Nvidia discrete chip.
BBSWITCH is set to OFF by default.
Kernel "Linux devbox 4.1.2-2-ARCH #1 SMP PREEMPT Wed Jul 15 08:30:32 UTC 2015 x86_64 GNU/Linux"
On a cold boot the screen shows some garbage (a huge block of RGB dots) that gets erased slowly from top to bottom, then it renders GRUB boot menu slooooowly.
After that everything works well, but I'm a bit worried if it's some glitch and i should replace the laptop while it's on warranty.
Please advice.
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#2 2015-07-26 22:46:29
- nixmd
- Member
- From: Earth
- Registered: 2013-03-19
- Posts: 11
Re: ThinkPad T540p - garbage on screen on each cold start
Is this like this?
https://bbs.archlinux.org/viewtopic.php … 9#p1548069
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#3 2015-07-26 22:53:14
- jdevelop
- Member
- Registered: 2014-04-18
- Posts: 48
Re: ThinkPad T540p - garbage on screen on each cold start
Not really, it happens only on boot, after that systems works fine.
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#4 2015-07-26 23:33:36
- nixmd
- Member
- From: Earth
- Registered: 2013-03-19
- Posts: 11
Re: ThinkPad T540p - garbage on screen on each cold start
What about the screen? is that llike this?
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#5 2015-07-26 23:41:52
- jdevelop
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- Registered: 2014-04-18
- Posts: 48
Re: ThinkPad T540p - garbage on screen on each cold start
No, the white noice doesn't cover the entire screen, only some part of it (~90% or so), and the white noice block is erased slowly from the bottom to top.
After it gets erased - the GRUB menu is rendered, then the video driver is loaded (so screen becomes blank for a moment) and then the boot completes normally
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#6 2015-07-27 19:34:02
- conradk
- Member
- Registered: 2015-07-27
- Posts: 4
Re: ThinkPad T540p - garbage on screen on each cold start
I think I might be having the same problem on a Thinkpad W541. Here's a video of the laptop booting up so you can see exactly what's going on:
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#7 2015-07-27 19:40:36
- jdevelop
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- Registered: 2014-04-18
- Posts: 48
Re: ThinkPad T540p - garbage on screen on each cold start
conradk ⇒ EXACTLY my case
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#8 2015-07-27 21:51:12
- jdevelop
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- Registered: 2014-04-18
- Posts: 48
Re: ThinkPad T540p - garbage on screen on each cold start
for the record - I tried to set
GRUB_GFXPAYLOAD_LINUX=text
to /etc/default/grub
and run grub-mkconfig
as a result, the glitch is still there, but after choosing the boot option - the display is switched to text
so perhaps the glitch is not associated with GRUB explicitly
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