I have been given a replacement monitor for my CentOS-6.3 KVM test platform. It is an LG E2251 22in letterbox format screen whereas the unit it replaces was a 17" standard format display. The console messages now look as through they were output on Silly Putty. The display itself displays a message to set the resolution to 1920 x 1080. I have found references to using the vga option in the grub.conf file. However, I can find no comprehensive list of what value to use. The references I have found actually say "see the source code in the Linux kernel tree", which does not strike me as particularly "user friendly" shall we say. How do I do this or am I condemned to rubber band output. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB at Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3
On Tue, 11 Sep 2012, James B. Byrne wrote:> To: centos at centos.org > From: James B. Byrne <byrnejb at harte-lyne.ca> > Subject: [CentOS] How to? Set boot up display resolution > > I have been given a replacement monitor for my CentOS-6.3 KVM test > platform. It is an LG E2251 22in letterbox format screen whereas the > unit it replaces was a 17" standard format display. The console > messages now look as through they were output on Silly Putty. > > The display itself displays a message to set the resolution to 1920 x > 1080. I have found references to using the vga option in the > grub.conf file. However, I can find no comprehensive list of what > value to use. The references I have found actually say "see the > source code in the Linux kernel tree", which does not strike me as > particularly "user friendly" shall we say. > > How do I do this or am I condemned to rubber band output.This might be what you are looking for James: http://www.kernel.org/doc/Documentation/svga.txt HTH Keith ----------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------
On 09/11/2012 02:21 PM, James B. Byrne wrote:> I have been given a replacement monitor for my CentOS-6.3 KVM test > platform. It is an LG E2251 22in letterbox format screen whereas the > unit it replaces was a 17" standard format display. The console > messages now look as through they were output on Silly Putty. > > The display itself displays a message to set the resolution to 1920 x > 1080. I have found references to using the vga option in the > grub.conf file. However, I can find no comprehensive list of what > value to use. The references I have found actually say "see the > source code in the Linux kernel tree", which does not strike me as > particularly "user friendly" shall we say. > > How do I do this or am I condemned to rubber band output.Are you talking about a CLI display boot resolution or a GUI display setting in X? If CLI, use this table: http://wiki.antlinux.com/pmwiki.php?n=HowTos.VgaModes -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 262 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20120911/b3ca4ad7/attachment-0003.sig>
So, I located the Kernel source documents or something approximating same: http://www.kernel.org/doc/Documentation/svga.txt>From this I gather that I probably have to reboot the system todiscover what mode to use. Is there another way of getting this info once the system is started? http://www.kernel.org/doc/Documentation/fb/vesafb.txt>From this I read:Advantages: * It provides a nice large console (128 cols + 48 lines with 1024x768) without using tiny, unreadable fonts. Now, I would really like to get back to an 80x24/26 cli console display, preferably centered on the new monitor. Is this possible? I would also like the font to be a bit larger, how is this done? Is it true, as I have been told, that one can no longer purchase a 'standard' form factor flat panel monitor? That they only make widescreens now? Really??? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB at Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3