https://bugzilla.kernel.org/show_bug.cgi?id=47351
Summary: [KMS: Mobility Radeon HD 6620G] Blank screen on boot Product: Drivers Version: 2.5 Kernel Version: 3.5.3 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: spesialstyrker@gmail.com Regression: No
Booting without nomodeset in the kernel parameters results in a blank screen using 3.5.3 kernel, and same behavior on mainline kernel version as well.
https://bugzilla.kernel.org/show_bug.cgi?id=47351
Alex Deucher alexdeucher@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |alexdeucher@gmail.com
--- Comment #1 from Alex Deucher alexdeucher@gmail.com 2012-09-10 20:19:08 --- Possibly a duplicate of bug 47321. Do you have the firmware installed and accessible in your initrd? Also possibly related: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=... or: http://lists.freedesktop.org/archives/dri-devel/2012-September/027545.html
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #2 from Michael Walton spesialstyrker@gmail.com 2012-09-10 20:26:09 --- Actually I didn't see when I looked before filing the report, but this looks like my exact situation including the suspend issues. Sorry for the duplicate report!
https://bugzilla.kernel.org/show_bug.cgi?id=46241
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #3 from Michael Walton spesialstyrker@gmail.com 2012-09-10 20:29:17 --- I don't know if it's the same as bug 47321 Mr. Deucher because the system will boot with KMS enabled, but the screen just stays blank.
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #4 from Alex Deucher alexdeucher@gmail.com 2012-09-10 20:35:35 --- (In reply to comment #2)
Actually I didn't see when I looked before filing the report, but this looks like my exact situation including the suspend issues. Sorry for the duplicate report!
That bug is for a blank screen on resume not boot. Do you only get a blank screen on resume, but not boot? Also, is this a regression? I.e., did previous kernels work? If so, can you bisect?
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #5 from Nick ka.nick@mail.ru 2013-04-29 12:01:07 --- Created an attachment (id=100251) --> (https://bugzilla.kernel.org/attachment.cgi?id=100251) lspci -vv output
I have the same behaviour on my HP 4545s laptop if I try to use discrete video card (HD7500/7600). I managed to get it work (more or less) on integrated 7240G, but I get blank screen having tried to switch to discrete video. Can I provide any additional information to help to resolve the issue?
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #6 from Alex Deucher alexdeucher@gmail.com 2013-04-29 14:20:38 --- (In reply to comment #5)
I have the same behaviour on my HP 4545s laptop if I try to use discrete video card (HD7500/7600). I managed to get it work (more or less) on integrated 7240G, but I get blank screen having tried to switch to discrete video. Can I provide any additional information to help to resolve the issue?
Most hybrid laptops are mux-less meaning there are no displays physically connected to the discrete GPU. For display you have to use the integrated GPU. The discrete GPU can only be used for offscreen rendering. Do display that rendering, it has to be copied to the integrated GPU. There is limited support for this in newer xservers (1.13.x and newer).
https://bugzilla.kernel.org/show_bug.cgi?id=47351
Nick ka.nick@mail.ru changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |ka.nick@mail.ru
--- Comment #7 from Nick ka.nick@mail.ru 2013-04-30 11:39:28 --- Yes, I'm quite sure my laptop is mux-less, so I guess the card actually works but cannot output anything... I've 1.13.4 installed (and 1.14.1 is available in portage softmasked). Is there any chance I could make use of this?
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #8 from Alex Deucher alexdeucher@gmail.com 2013-04-30 12:57:39 --- (In reply to comment #7)
Yes, I'm quite sure my laptop is mux-less, so I guess the card actually works but cannot output anything... I've 1.13.4 installed (and 1.14.1 is available in portage softmasked). Is there any chance I could make use of this?
You can use xrandr to configure it using the -setprovideroutputsource and -setprovideroffloadsink parameters
https://bugzilla.kernel.org/show_bug.cgi?id=47351
--- Comment #9 from Nick ka.nick@mail.ru 2013-04-30 13:18:22 --- Thank you!
https://bugzilla.kernel.org/show_bug.cgi?id=47351
Alan alan@lxorguk.ukuu.org.uk changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |alan@lxorguk.ukuu.org.uk Resolution|--- |DOCUMENTED
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