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I'm running Xubuntu on a laptop with 1366x768 resolution and Radeon 4330 card, default radeon driver. I've never made any manual config changes, everything ran smoothly for a couple of months after installing Xubuntu.

Suddenly after a system restart the resolution of display dropped to 1024x768 and xrandr output now says:

xrandr: Failed to get size of gamma for output default Screen 0:
minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768 default
connected 1024x768+0+0 0mm x 0mm
1024x768    0.0*

So it now calls the output "default" and the only available resolution is wrong.

Before the problem occurred, xrandr output used to contain "LVDS" with a list of correct resolutions.

I did not make any configuration changes or install any new software lately.

Zanna
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astreltsov
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1 Answers1

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This fixed it:

sudo apt-get install --reinstall linux-image-3.13.0

Turned out drivers stopped loading for display and some other devices. I noticed it and tried to reload the module

modprobe -r atl1c
modprobe atl1c

but it gave the following error

 modprobe: ERROR: ../libkmod/libkmod.c:556 kmod_search_moddep() could not open moddep file '/lib/modules/3.13.0-24-generic/modules.dep.bin'

I investigated that, and found this question with the solution

"Could not open moddep file '/lib/modules/3.XX-generic/modules.dep.bin'" when mounting using a loop

this solution also installed a pile of old kernels which I had to delete afterwards, but it worked

Community
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astreltsov
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